How is engine operation being maintained between the low and high pressure system of the F110 engine?
By controlling speed of low pressure rotor by regulating high pressure rotor speed.
By controlling speed of high pressure rotor by regulating low pressure rotor speed.
By controlling speed of low pressure rotor by regulating high pressure turbine speed.
By controlling speed of high pressure rotor by regulating low pressure turbine speed.
How many main shaft engine bearings are used to support the two separate rotating systems in the F110-GE-129C engine?
6
5
4
3
Which of the following components uses impingement cooling?
HPT Nozzle
Stage 1 LPT Blade
Stage 2 LPT Nozzle
All are correct.
How is the forward sump pressurized?
By 3rd stage bleed air
By 5th stage bleed air
By 9th stage bleed air
Not pressurized.
How the No.2 and No.3 carbon seals are pressurized?
They are pressurised by third stage seal leakage air.
They are pressurised by fifth stage seal leakage air.
They are pressurised by ninth stage seal leakage air.
They are pressurised by aircraft ECS systems.
What does the mid sump house?
No.1 roller bearing
No.5 roller bearing
Accessory gearbox
Inlet Gearbox
What separates air seals from oil seals?
Pressurization chamber
Oil sump
Containment chamber
Air oil separator
What is the function of the rabbets provided on both disks for LPT shaft, seals, spacer seal, and blade retainer flanges?
To maintain rotor balance by preventing rotor shifting
To maintain shaft balance by preventing component shifting
To prevent component shifting by maintaining shaft imbalance
To maintain rotor concentricity by preventing component shifting
How many bearings are there in the F110-GE-129C engine?
3
4
5
6
Where is the T2 sensor mounted?
Front frame at approximately the 5 o'clock position with the sensor element projecting into the airstream between the IGVs.
Front frame at approximately the 7 o'clock position with the sensor element projecting into the airstream between the IGVs.
Fan frame at approximately the 7 o'clock position with the sensor element projecting into the airstream between the IGVs.
Fan frame frame at approximately the 5 o'clock position with the sensor element projecting into the airstream between the IGVS.
What are the material used for the fabrication of Stage four and five compressor stator vanes?
Titanium alloy
René N5
Inconel alloy
Waspaloy
What type of Oil seals are found in the F110-GE-129C engine?
Carbon & Rotating type
Carbon & Labyrinth type
Rotating & Labyrinth type
Carbon & Air type
The F110 engine is a ________dual-rotor engine consisting of a high pressure system, a mechanical independent low-pressure system.
Mechanically coupled
hydraulically
aerodynamically coupled
Hydromechanically coupled
In the F-15SG, bleed air extracted from the engine______stage bleed ports are for airframe use.
Third
Fifth
Ninth
Fifth and Ninth
The F110-GE-129 Increased Performance Engine or (IPE) has a rated of thrust of_____lbs in maximum afterburner
19,000
25,000
29,000
31,000
What material is used in the high and low pressure turbines, which provide exceptional high- temperature strength and oxidation resistance for long life?
Mono-crystal Rene N5
Directionally Solidified Rene N5
Mono-crystal Waspalloy
Directionally Solidified Waspalloy
What type of engine is the F110-GE-129C?
is a low bypass, low compression ratio, dual spool, and a mixed flow augmentor.
Is a high bypass, high compression ratio, dual spool, and a mixed flow augmentor.
Is a high bypass, low compression ratio, dual spool, and a mixed flow augmentor.
Is a low bypass, high compression ratio, dual spool, and a mixed flow augmentor.
What is the function of the mid gutter-ring found in the flameholder?
Directs the hot gases out of the exhaust
Provides structural support to the flameholder
spreads the flame to the radial gutters of the flameholder
All are correct
The F110-GE-129 engine is made up of____ assemblies
19
20
21
22
What is the difference between Roller bearing and Ball bearing in the engine?
Roller bearing is to absorb axial and radial loads while a Ball bearing is designed to absorb radial loads only.
Ball bearings is designed to absorb axial loads only while a Roller bearing is designed to absorb radial loads only.
Roller bearings is designed to absorb axial loads only while a Ball bearing is designed to absorb radial loads only.
Ball bearings is designed to absorb axial and radial loads while a Roller bearing is designed to absorb radial loads only.
How is power from the compressor rotor is transferred from the inlet gearbox assembly to the accessory gearbox?
Through a axial drive shaft
Through the PTO assembly
Through a radial drive shaft
Through the axial drive shaft and bevel gear assembly
Which of the following sumps has the lowest pressure?
Forward
Mid
Aft
Mid and Aft Sump
What is the secondary air in the combustion zone used for?
To mix with the hot gases delivered from the primary zone to provide uniform turbine temperatures
to mix with the hot gases delivered from the tertiary zone to provide uniform turbine temperatures
To stabilise the combustion process
For the cooling of the inner walls of the combustor case
What happen to the anti icing valve during engine starts?
It opens to bleed the compressor thus preventing stalls during start-up.
It closes to prevent loss of bleed pressure during start-up.
It remains close until 61% rpm to to prevent loss of bleed pressure during start-up.
It opens to bleed the fan thus preventing stalls during start-up.
Compressor bleed air extracted from the____is utilised for de-icing and low pressure cooling function.
Combustor case
Ninth stage
Third stage
Fifth stage
What is the function of the engine anti-icing control system?
Prevents the formation and accumulation of ice on the fan rotor and the forward centrebody
Prevents the formation and accumulation of ice on the fan frame struts, the forward centerbody, and the IGV flaps
Prevents the formation and accumulation of ice on the fan stator, the forward centrebody and the IGV flaps
Prevents the formation and accumulation of ice on the front frame struts, the forward centerbody, and the IGV flaps
What is the overall compression ratio for F110-GE-129C engine?
23 to 1
15 to 1
30 to 1
10 to 1
Which of the following sump is not pressurised?
Aft Sump
Mid Sump
Forward Sump
Forward sump and Mid sump
How does the Inlet Ice Detector detects ice?
By sensing a frequency shift in the magnetostrictive oscillating probe
By sensing a frequency shift in resistance thermal device
By sensing a voltage change in the magnetostrictive oscillating probe
By sensing a voltage change in resistance thermal device
What is the function of the ENG Heat Switch "TEST" position?
to test the Inlet Ice Detector output stage and the Ice detector warning light circuit
To test the Inlet Ice Detector output stage and the Anti icing valve indication circuit
To test the Inlet Ice Detector output stage and the Ice detector heating circuit
To test the Inlet Ice Detector output stage and perform wraparound test on Anti icing valve solenoid.
What are the conditions to turn "ON" the anti icing valve?
"ENG HEAT" switch is set to "OFF" position
The fifth stage bleed air is above 20 psi
Anti icing valve looses power (i.e. Solenoid de-energise)
All are correct
What is the purpose of venting mid and aft sumps overboard?
To maintain a low pressure inside the sumps
To maintain a high pressure inside the sumps
To purge off excess oil from the sumps
To maintain a low pressure and purge off excess oil from the sumps
Where is the ice detector mounted on?
On the left intake duct (approx 11 o'clock position, aft looking forward) close to the engine inlet.
On the left intake duct (approx 1 o'clock position, aft looking forward) close to the engine inlet
On the right intake duct (approx 11 o'clock position, aft looking forward) close to the engine inlet.
On the right intake duct (approx 1 o'clock position, aft looking forward) close to the engine inlet.
What is usable capacity of the oil tank at all attitudes?
1.0 gallons
1.1 gallons
1.2 gallons
1.3 gallons
What are the condition that will cause the oil level sensor in the oil tank will to illuminate Left or Right (L/R) OIL Quantity (QUANT) Caution?
Oil level drops below 1.1 gallons for 15 seconds
Oil level drops below 1.1 gallons for 10 seconds
Oil level drops below 1.5 gallons for 15 seconds
Oil level drops below 1.5 gallons for 10 seconds
Where is the master chip detector located?
oil scavenge line between the oil tank and the tri-cooler
Oil scavenge line between the lube and scavenge pump and the tri-cooler
Oil supply line between the oil tank and the lube and scavenge pump
The lube and scavenge pump
The Tri-cooler reduces the temperature of the scavenge' and hydraulic oil by using medium.
Oil
Hydraulic
Fuel
Air
What is the main purpose of the oil filter service shutoff valve?
To prevent oil from draining from the system during oil scavenge screen inspection
To prevent air from entering the system during oil filter replacement.
To prevent oil from draining from the system during oil filter replacement
To prevent air from entering the system during oil scavenge screen inspection.
How does excess cavity air in the forward sump being removed?
Air is vented to the mid sump
Air is vented to the fan flow path
Air is being scavenged back by the lube and scavenge pump
is vented to the accessory gearbox.
The auxiliary oil supply subsystem provides a temporary oil supply to the bearing in the event that normal oil supply to that bearing is interrupted.
No. 2
No. 3
No. 4
No. 5
How is the mid sump being vented?
through the oil tank de-aerator
Hrough the aft centerbody into the engine flowpath
Through the Oil tank pressurizing valve
Through the Lube & scavenge pump
How many lubrication sumps are there in F110-GE-129C?
5
4
3
2
What does the oil pressure transmitter measures?
Lube pump output pressure
Scavenge oil return pressure
Differential pressure between the vent and lube pump output pressure
Differential pressure between the scavenge discharge pressure and lube pump output pressure
The Engine Oil System is a self-contained, that provides oil for lubricating and cooling the engine main shaft bearings, oil seals, gearboxes and accessories.
Dry sump, un-pressurised lubrication system
Wet sump, un-pressurised lubrication system
Wet sump, pressurised lubrication system
Dry sump, pressurised lubrication system
If the oil level drops below 1.1 gallons for 15 seconds, the in the MPD will illuminate.
L/R OIL TEMP Caution
L/R OIL PRESS Caution
L/R OIL QUANT Caution
L/R OIL LOW Caution
What are the conditions required for the MEMSC to trigger the high oil level fault?
oil quantity is equal or greater than 3.0 gallons at takeoff.
Oil quantity is equal or greater than 3.0 gallons at trend point.
Oil quantity is equal or greater than 3.3 gallons at takeoff.
Oil quantity is equal or greater than 3.3 gallons at trend point.
What does the "green zone" of the oil tank sight gauge indicates?
Oil quantity is between 41 and 47 units
oil quantity is between 39 and 45 units
Oil quantity is less than 3.0 gallons
Oil quantity is more than 2.8 gallons
How are the oil tank lube and hydraulic compartments connected?
through a 0.06 inch diameter vent hole between the compartments
Not connected to each other
Through an eductor located between the compartments
Through the hydraulic vent orifice located at the top of the hydraulic tank.
Choose the most correct statement describing the Main Engine Control (MEC).
A hydromechanical fuel flow regulator that is mounted on the rear face of the main fuel pump
An electrically operated fuel flow regulator that is mounted on the rear face of the main fuel pump
A hydraulically operated fuel flow regulator that is mounted on the rear face of the main fuel pump
An electro-hydromechanical fuel flow regulator that is mounted on the rear face of the main fuel pump
Choose the most correct statement describing the main fuel pump.
A positive displacement; single element pump mounted on the aft left hand pad of the accessory gearbox
a positive displacement; dual element pump mounted on the aft left hand pad of the accessory gearbox
A positive displacement; single element pump mounted on the aft right hand pad of the accessory gearbox
A positive displacement; dual element pump mounted on the aft right hand pad of the accessory gearbox
During non afterburner mode, fuel is circulated through the ______manifolds.
Local and Core
Core and Fan
Local, Core and Fan
Not Circulated
What is the main purpose of the engine driven fuel boost pump?
To provide a positive inlet pressure to the MEC and AFC
To provide a positive inlet pressure to the DEC and MEMSC
To provide a positive inlet pressure to the MFP and AFP
To provide a positive inlet pressure to the AFP and MEC
What does the fuel flow transmitters measures?
Main engine fuel flow and have a range of 0 to 10,000 pph
total engine fuel flow and have a range of 0 to 10,000 pph
main engine fuel flow and have a range of 0 to 100,000 pph
Total engine fuel flow and have a range of 0 to 100,000 pph
Where does the augmenter fuel control mounted to?
To the rear face of the augmenter fuel pump
To the rear face of the fuel boost pump
On the lower outer duct at approximately seven o'clock position
N the lower outer duct at approximately five o'clock position
How is the Engine fuel boost pump installed?s
Flange mounted to the aft right hand pad.of the accessory gearbox and secured with a V band clamp
Flange mounted to the aft left hand pad of the accessory gearbox and secured with a V band clamp
Flange mounted to the aft right hand pad of the accessory gearbox and secured with 5 self locking nuts
Flange mounted to the aft left hand pad of the accessory gearbox and secured with 5 self locking nuts
Augmenter manifold circulation fuel is provided by the _____ during non afterburning operation.
Main Fuel Pump
Augmenter Fuel Control
Augmenter fuel pump
Fuel Boost Pump
How is the augmenter fuel pump mounted?
Flange mounted to the forward right hand pad of the accessory gearbox and secured with a V band clamp
Flange mounted to the forward left hand pad of the accessory gearbox and secured with a V band clamp
Flange mounted to the forward right hand pad of the accessory gearbox and secured with 5 self locking nuts
Flange mounted to the forward left hand pad of the accessory gearbox and secured with 5 self locking nuts
Which of the following is NOT a function of the MEC.
Turn off all augmenter fuel flow in event of an electrical failure
Main fuel pump unloading during fuel shutoff conditions.
Core speed scheduling in hybrid and secondary modes.
Positive fuel shutoff in PLA off position
Which of the following is NOT a function of the AFC.
Directs fuel flow to local, core and fan discharge ports to circulate fuel through local, core and fan manifolds.
Provides a signal for augmenter pump on/off through electrical solenoid
Regulates fuel flow in response to CDP (PS3C) and DEC inputs
Limiting of min and max CDP in hybrid and sec mode.
How are the core VSV and fan IGV actuators actuated?
Using high pressure fuel from Engine boost pump
Using high pressure fuel from Main fuel pump
Using high pressure fuel from Main engine control
actuated using high pressure fuel from Augmenter fuel pump
The on/off solenoid, (normally closed) on the_____is energized with 28 vdc from the DEC during augmentation
AFC
MEC
MFP
AFP
What is the purpose of circulating the fuel through the augmenter fuel manifolds during non Augmentation power settings?
To keep the manifold full and thus help insure fast smooth augmenter light offs
To keep the manifold full and thus help to prevent air lock
To keep the manifold full and thus help to pressurise the fuel lines and provide atomised fuel spray pattern
All are incorrect
What must be performed before draining fuel from the engine fuel feed manifold?
Select the fuel master switches to 'OFF' position.
Apply external electrical power supply and close the fuel shut off valve
Open the fuel shut off valve and fuel flow indicator circuit breakers
Apply external electrical power supply, when draining the fuel
Which of the following parameters is provided to the EMD by the DEC?
EGT and RPM
EGT, RPM and Oil Pressure
EGT, RPM, A8 and Oil Pressure
EGT, RPM/A8, Fuel Flow and Oil Pressure
Which of the following sensor is used to detect a successful light off in the augmenter
T4B
T5.6
Flame sensor
Ultra violet detector
The quartz window, located in the mounting face of the flame sensor housing is aimed at the through openings in the augmenter duct and liner.
Igniter Fuel Tube
Mixing Duct
AB Igniter plug
Flameholder
What is the function of T5.6 sensor?
To provide actual exhaust gas temperature to DEC for fuel scheduling purposes
To provide EGT indication to the cockpit
To provide redundancy for T4B
To provide critical parameter for engine operations
How is the Digital Electronic Control (DEC) is a cooled?
The DEC is cooled by a fuel circulation loop supplied directly from the aircraft fuel Boost System
The DEC is cooled by a fuel circulation loop supplied directly from the engine fuel boost pump
The DEC is cooled by a fuel circulation loop supplied after the Tri-cooler
The DEC is cooled by a fuel circulation loop supplied directly from the MEC
During normal operation, how is the DEC being powered?
Powered by 28Vdc
Powered by 115Vac
Powered by Engine Alternator
powered by Aircraft Generator
The T5.6 thermocouple is a _____junction type, one leg of which is chromel (non magnetic) wire and the other alumel (magnetic) wire.
Open
Close
Double
Single
What are the main components of the Engine Ignition System?
Alternator, Ignition Exciter
Main Igniter Lead, Main Engine Spark Igniter
Augmenter Spark Igniter
All are correct
What are the three ignition circuits that is housed in the ignition exciter?
Low energy main circuit, high energy redundant circuit and Augmenter ignition circuit
High energy main circuit, low energy redundant circuit and high energy Augmenter ignition circuit
High energy main circuit, low energy redundant circuit and Augmenter ignition circuit
High energy main circuit, low energy redundant circuit and low energy Augmenter ignition circuit
What would loss of T2 signal from one of the sensor will result in?
FDT signal will be used by the DEC
The other sensor being used
Loss of T2 signals to the DEC
A default value of 635 degrees R is being used
How is the pyrometer being cooled?
Cooled by fuel through circulation loop tee off after the aircraft main fuel shutoff valve and returned to the feed tank.
By fuel through circulation loop tee off from the engine fuel boost pump outlet and returned to the boost pump inlet
Cooled by fuel through circulation loop supplied directly from the aircraft boost system and returned to the feed tank.
Cooled by fuel through circulation loop tee off from the MEC outlet and returned to the boost pump inlet
Which of the following signal from the engine is NOT used by the DEC for engine control?
A8 LVDT
Core VSV LVDT
T2.5 RTD Signal
A8 synchro
What type of device is the fan inlet temperature sensor?
An eddy current device that senses changes in air temperature and provides a frequency change
An ultraviolet device that senses changes, in air temperature and provides a frequency change
A dual element thermocouple that senses changes in 'air temperature and provides a voltage change.
A dual element resistance thermal device that senses changes in air temperature and provides a resistance change.
The main high energy igniters come on at____ core speed of the engine.
5 percent rpm
10 percent rpm.
15 percent rpm
20 percent rpm
What are the 2 signals necessary for augmenter ignition?
Augmenter initiation signal (NG more than 85 percent and PLA more than 100 degree) must be present and WFR/PS3C must be below 25 ratios unit for more than 1.5s
Augmenter initiation signal (NG more than 90 percent and PLA more than 90 degree) must be present and WFR/PS3C must be below 20 ratios unit for more than 1.5s
Augmenter initiation signal (NG more than 85 percent and PLA more than 90 degree) must be present and WFR/PS3C must be below 25 ratios unit for more than 1.5s
Augmenter initiation signal (NG more than 85 percent and PLA more than 90 degree) must be present and WFR/PS3C must be below 20 ratios unit for more than 1.5s
When will the low energy ignition be enabled?
L/R Engine Control Switch is positioned to "OFF" position (Secondary mode)
Engine control is in secondary mode (automatic or manual selection)
Engine control is in secondary mode (automatic or manual selection) and the aircraft is "OFF" the ground (i.e Airborne Condition).
L/R Engine Control Switch is positioned to "OFF" position (Secondary mode) and the aircraft is "OFF" the ground (i.e Airborne Condition).
What type of device is the Turbine Blade Temperature sensor (T4B)?
is an optical pyrometer that is flanged mounted to the outer duct at approximately 7 o'clock and sights through an aperture into HPT flow path.
is an optical pyrometer that is flanged mounted to the outer duct at approximately 7 o'clock and sights through an aperture into Stage 1 LPT flow path.
is an optical pyrometer that is flanged mounted to the outer duct at approximately 5 o'clock and sights through an aperture into HPT flow path.
is an optical pyrometer that is flanged mounted to the outer duct at approximately 5 o'clock and sights through an aperture into Stage 1 LPT flow path.
How does the fan speed sensor (NF) operates?
A flanged ferromagnetic disk with a curved metal tube containing electrical leads, with two pickup sensor at one end of tube and two electrical connectors at the other end.
a curved metal tube containing electrical leads, with a pickup sensor at one end of tube and two electrical connectors at the other end.
A flanged ferromagnetic disk with a curved metal tube containing electrical leads, a pickup sensor at one end of tube and two electrical connectors at the other end.
A curved metal tube containing electrical leads, with a pickup sensor at one end of tube and one electrical connectors at the other end.
How are the nozzle actuators synchronized during operation?
Electrically by means of a worm gear in the actuator
Mechanically by means of a worm gear in the actuator
Electro-hydromechanically by means of a flexible torque carrying cable
Mechanically by means of a flexible torque carrying cable
What does the A8 LVDT provide for during engine operation?
To provide a demand signal for A8 control to the DEC
To provide a feedback signal of the A8 position to the DEC
To provide a feedback signal of the A8 position to the EMD
To provide a feedback signal of the A8 position to both the DEC and EMD
Which component provides excitation voltage for the A8 synchro?
By the DEC
By the alternator
By aircraft 26 VAC
By aircraft 28 vdc
The variable exhaust nozzle is a three-flap minimize drag.
Convergent/convergent
Convergent/divergent
Divergent/divergent
Divergent/ convergent
What is the function of the two-sided spool hydraulic de-torquing valve during engine start?
Allow buildup of hydraulic pump discharge pressure
Prevent buildup of hydraulic pump discharge pressure
For backup overpressure protection
Prevent excess heat and pressure buildup in the rod port supply line
How does the engine nozzle throat area reduced?
Retracting the nozzle actuators which pulls in a synchronization ring that closes the exhaust nozzle primary flaps and seals
extending the nozle actuators which pulls in a synchronization ring that closes the exhaust nozzle primary flaps and seals
Retracting the nozzle actuators which pulls in a synchronization ring that opens the exhaust nozzle primary flaps and seals
Extending the nozzle actuators which pulls in a synchronization ring that opens the exhaust nozzle primary flaps and seals
Where is A8 LVDT transducer is located?
On the exhaust nozzle duct between the top 2 actuators
At the left hand of the exhaust nozzle duct
On the right of the augmentor assembly
On the exhaust nozzle duct between the bottom 2 actuators
Which of the following is NOT part of the Exhaust Nozzle Control system?
Hydraulic Pump
Nozzle Actuators
Nozzle Flaps
Position Feedback Transducers
How is the hydraulic pump being controlled?
Controlled by an electrical demand signal from the DEC.
controlled by an mechanical demand signal from the lube and scavenge pump.
Controlled by an hydraulic demand signal from the lube and scavenge pump.
Controlled by a main electrical demand signal from the DEC and a backup hydraulic demand signal from the lube and scavenge pump.
There F110-GE-129C exhaust nozzle actuation system comprise___nozzle actuators and___LVDT
3, 1
4, 2
4, 1
3,2
How does the excess heat from the hydraulic pump removed?
By a continuous flow of oil from the cooling port through the oil cooler and to the engine oil tank.
By a continuous flow of oil from the engine oil tank through the oil cooler then to the oil pump
By a continuous flow of oil from the cooling port through the oil cooler and to the hydraulic oil tank..
By a continuous flow of oil from the hydraulic oil tank through the oil cooler then to the oil pump.
What is the function of an A8 synchro signal?
It is used by the control system in secondary mode
It is only used by the control system when the A8 LVDT is invalid
It is not used by the control system regardless of the engine control mode or DEC status
It is used for display of A8 area in the MPD
Where the oil for the operation of the hydraulic actuators does comes from?
The hydraulic compartment of the oil tank.
The engine supply compartment of the oil tank
The hydraulic compartment of the oil tank after routing through the tri-cooler
the engine supply compartment of the oil tank after routing through the tri-cooler
What is the main function of the Engine Exhaust System?
It schedules nozzle position to control fan stall margin by through varying nozzle throat area (A8)
It schedules nozzle position to control the expansion ratio of engine exhaust gases for optimum performance through the entire range of engine operations.
It schedules nozzle position to control fan speed is as a function of PLA andT2
It schedules nozzle position to control fan stall margin by through varying nozzle throat area (A8) and control the expansion ratio of engine exhaust gases for optimum performance through the entire range of engine operations.
What is the function of the A8 LVDT transducer ?
Provides electrical signals proportional to exhaust nozzle exit area to DEC
Provides electrical signals proportional to exhaust nozzle exit area to MEMSC
Provides electrical signals proportional to exhaust nozzle throat area to DEC
Provides electrical signals proportional to exhaust nozzle throat area to MEMSC
Hydraulic pressure required for the control of the servo valves in the hydraulic pump is provided by
Gerotor pump in the hydraulic pump
Vane pump in the hydraulic pump
Gear element pump in the hydraulic pump
Pump in the hydraulic pump
How is A8 roof controlled during augmenter operation?
Function of PLA but trimmed by Delta P/P, NF and T2
Function of Augmenter metering valve position but trimmed by Delta P/P and NF
Function of PLA and augmenter metering valve position but trimmed by Delta P/P and NF
function of PLA and augmenter metering valve position but trimmed by Delta P/P, NF and T2
How is A8 roof and floor set during non-augmented operation?
By DEC as a function of Delta P/P
By DEC as a function of Delta P/P and PLA
by DEC as a function of PLA
By DEC as a function of PLA and Augmenter metering valve position
What happened when an augmenter fault is detected during AB operation?
The DEC will lock the A8 roof/ floor schedule
The AFC will "held" fuel flow at the minimum afterburner level until fault is cleared
The DEC will turn off the Augmenter pump
All are in correct
The DEC, while in Primary mode, has full authority over____control loops.
3
4
5
6
What would loss of DEC electrical power or position feedback signals result in?
Fan inlet guide vane being positioned at its last position
Fan inlet guide vane being positioned full close
Fan inlet guide vane being positioned full open
Fan inlet guide vane being positioned 10° from full close
When does the DEC controls the operation of the IGV flaps?
When the engine is operating in Primary mode
When the engine is operating in Hybrid mode
When the engine is operating in Secondary Mode
When the engine is operating in Primary, Hybrid and Hybrid VSV modes
Where are the variable geometry vanes of the compressor located?
In the inlet guide vanes and the following three stages of core stator vanes
in the first four stages of core stator vanes
in the inlet guide vanes and the following two stages of core stator vanes
In the inlet guide vanes and the following four stages of core stator vanes
Where is the Fan Discharge Temperature (FDT) mounted to?
A single element device that is mounted in the engine front frame
A dual element device that is mounted in the engine front frame
A dual element device that is mounted in the engine fan frame
A single element device that is mounted in the engine fan frame
What does the hydromechanical section of the FDT sensor contains?
Nitrogen filled, sensing coil that converts air temp into a proportional fuel pressure signal to the MEC
Nitrogen filled sensing coil that converts air temp into a proportional pneumatic pressure signal to the MEC
Helium filled sensing coil that converts air temp into a proportional pneumatic pressure signal to the MEC
Helium filled sensing coil that converts air temp into a proportional fuel pressure signal to the MEC
How does the MEC receives the equivalent of engine speed?
Through the driveshaft located in the MFP, 'any change in speed will translate position of the Accel/VSV 3D cam axially
Through the driveshaft located in the MFP, any change in speed will change the angular position of the Accel/VSV 3D cam
Through the driveshaft located in the MEC, any change in speed will translate position of the Accel/VSV 3D cam axially
Through the driveshaft located in the MEC, any change in speed will change the angular position of the Accel/VSV 3D cam
When will the VSVS be electrically scheduled by the DEC?
When the engine is operating in Primary mode
When the engine is operating in Primary and Hybrid Mode
When the engine is operating in Primary and Secondary mode
When the engine is operating in Primary and Hybrid VSV Mode
When will the VSVS be hydro-mechanically scheduled?
When the VSV mode select solenoid is energised and hydraulic pressure is removed from spool in the VSV transfer valve.
When the VSV mode select solenoid is de-energized and hydraulic pressure is removed from spool in the VSV transfer valve.
When the VSV mode select solenoid is energized and hydraulic pressure is supplied to the spool in the VSV transfer valve.
When the VSV mode select solenoid is de-energized and hydraulic pressure is supplied to the spool in the VSV transfer valve.
When the VSV mode select solenoid is de-energized and hydraulic pressure is supplied to the spool in the VSV transfer valve.
The signal is provided electrically to the DEC via a LVDT in the throttle quadrant
The signal is provided electrically to the DEC via a RVDT in the throttle quadrant
The signal is provided electrically to the DEC via a RVDT in the MEC
The signal is provided electrically to the DEC via a LVDT in the MEC
What is the position of the throttle for the insertion of the rigging pin to the rigging pin hole in the MEC?
0 deg and 87.5 deg
16.5 deg and 87.5 deg
0 deg and 94.7 deg
16.5 deg and 130 deg
What is the control mode of the engine when the engine is operating Primary mode steady-state condition?
The engine is in the core speed scheduling mode
The engine is in the T4B scheduling mode
The engine is in the fan speed scheduling mode
The engine is in the T5 scheduling mode
How is the fan speed scheduled in primary mode?
Function of PLA and is modified by FDT and aircraft airspeed
function of PLA and is modified by T2 and airspeed
Function of PLA and is modified by FDT and aircraft Mach number (Mn)
Function of PLA and is modified by T2 and aircraft Mach number (Mn)
How is the ground and flight defined by the DEC in Primary mode?
Function of PLA
Function of PLA and Mach Number
Function of Airspeed
Function of Mach Number
What is the function of the minimum core speed schedule?
To assure sufficient core speed for compressor stall avoidance during slow decel
To assure sufficient core speed for compressor stall avoidance during rapid decel
To ensure sufficiently high idle core speed required to provide minimum shaft speed for aircraft boost pump
All are incorrect
What are the conditions that will result in the engine reaching the maximum core speed limit before the fan speed schedule?
Damaged compressor
Slightly mis-scheduled core VSVs angles
Damaged fan rotor
Damaged compressor and slightly mis-scheduled core VSVs angles
What is the function of hydroclone filter in the MEC?
It is used to provide clean fuel to operate the servo systems by creating a vortex in the flow stream.
It is used to provide clean fuel for the fuel nozzles by creating a vortex in the flow stream.
It is used to provide clean fuel to operate the servo systems by maintaining a constant pressure differential in the flow stream.
It is used to provide clean fuel for the fuel nozzles by maintaining a constant pressure differential in the flow stream.
In Hybrid mode, the DEC de-energize the____solenoids
Mode select and VSV select solenoids
Mode select, IGV transfer and VSV select solenoids
Mode select and IGV transfer solenoids
VSV select and IGV transfer solenoid
How is power for the secondary mode fan speed limiter being provided?
Engine alternator winding, independent of the one powering the primary mode.
Aircraft Vdc power from the Battery Bus No. 2.
Engine alternator winding, independent of the one powering the primary mode and by aircraft- produced 28 Vdc power from the ENG CONT/ESS 28 VDC bus.
Aircaraft IDG Vdc from IDG battery Bus No.2.
Which of the following failures will result in an automatic transfer to Secondary Mode?
Failures detected Fan IGV Torque Motor
Failures detected in both T2 sensors
A severed throttle cable
All are correct
What is the main purpose of the Automatic Thrust Departure Prevention System (ATDPS)?
is an automatic system that precludes relying on aircrew response to prevent yaw departure due to a sudden thrust loss on one engine during takeoff
Is an automatic system that precludes relying on aircrew response to prevent yaw departure due to a sudden thrust loss on one engine in flight
is an automatic system that precludes relying on aircrew response to prevent dutch roll due to a sudden thrust loss on one engine during takeoff
Is an automatic system that precludes relying on aircrew response to prevent dutch roll due to a sudden thrust loss on one engine in flight
What are the conditions where the F-15SG ATDPS system is not available?
Takeoff until 20 seconds after airborne
Takeoff until 20 seconds after the gear handle is moved to the up position
Landing until 20 seconds after the gear handle is moved to the down position
Landing until 20 seconds after landing gear is lowered
What are the conditions for the initiation of the F-15SG ATDPS system?
The ATDPS is enabled whenever the DEC commands a hybrid mode transfer and aircraft in critical region
The ATDPS is enabled whenever the "Engine Control Caution" is illuminated
The ATDPS is enabled whenever the DEC commands a hybrid VSV mode transfer and aircraft in critical region
The ATDPS is enabled whenever the DEC commands a hybrid or hybrid VSV mode transfer and aircraft in critical region
Which of the below mentioned is not part of the engine indicating and monitoring system?
Engine caution lights
Avionics status panel
MEMSC
MDEC
What are the two engine parameters that are available during engine start?
Nozzle position and Fuel Flow
RPM and temperature
Oil pressure and temperature
RPM and Fuel Flow
What is the function of MEMSC?
Sends and stores parameter digital data from the DEC for performing diagnostic logic
Downloads and sends parameter digital data from the DEC for performing diagnostic logic
Receives and stores parameter digital data from the DEC for performing diagnostic logic
Extract and save parameter digital data from the DEC for performing diagnostic logic
What the the five engine parameters that the DEC monitor?
T2.5, T4B, A/C PLA, Flame sensor
NG, T4B, A8 Synchro, A/C PLA, T5.6
Cooling fuel temperature, A/C PLA, T5.6, T4B, MEC PLA
T4B, NG, MEC PLA, Flame Detector, and cooling fuel temperature
What does the recorded data from the SFDR DAS are used for?
Mishap investigations
Individual Aircraft Tracking Recording
Engine use Data
All are correct
The MEMSC receives and stores parameter digital data from the ____ for performing diagnostic logic.
MEC
EMD
DEC
CETS
What are the primary components for the SFDR/DAS systems?
Aileron Transducers
Data acquition unit
Enhanced Crash Survivable Memory Unit
All are correct
Where is the Avionic Status Panel (ASP) is located?
In the Right Main wheel well.
In the Left Main wheel well.
In the Nose wheel well.
In the cockpit.
Fault, exceedances, trend data, part life tracking data, and operator initiated data saves are stored in the MEMSC memory. The data can be downloaded to a _____ for use by maintenance personnel
Engine Transfer Computer System
Common Engine Transfer System
Transferable Engine Computer System
Common Engine System Terminal
Which of the following engine parameters is only available in MPD/MPCD?
Blade temperature
Oil quantity
Engine control mode
All are correct
Where is the remote download receptacle for the MEMSC data located?
Door 113
Door 117
Door 122
Door 154
Which of the following is not a capability of the CETADS?
provide fault isolation trees for the troubleshooting of trend events
Rankings showing engine-usage distribution based on EOT or other engine-life parameters
Fault reports show fault codes that have occurred on selected engines over a selected time period
Plotted transient data showing parameter relationships for engine events
How to improve the efficiency of air induction system at speeds greater than approximately Mach 1.4?
Speeds greater than Mach 1.4 the use of normal shock wave compression with a variable inlet duct is required.
Speeds greater than Mach 1.4 the use of incipient shock wave compression with a variable inlet duct is required.
Speeds greater than Mach 1.4 the use of oblique shock wave compression with a variable inlet duct is required.
Speeds greater than Mach 1.4 the use of expansion shock wave compression with a variable inlet duct is required.
What parameters were used by EAIC functions of the ADP?
Total pressure, Static Pressure, AOA, Total temperature, Inlet throat total pressure, Inlet throat static pressure,First ramp position and third ramp position
Total pressure, Static Pressure, AOA, Total temperature, Inlet throat total pressure, Inlet throat static pressure, First ramp position and Diffuser ramp position
Total pressure, Static Pressure, AOA, Total temperature, Inlet throat total temperature, Inlet throat static pressure,First ramp position and Diffuser ramp position
Total pressure, Static Pressure, AOA, Total temperature, Inlet throat total temperature, Inlet throat static pressure,First ramp position and third ramp position
What is the primary purpose of the bypass door?
Prevent inlet buzz
Increase ram air
Slow the air down
Increase swirl flow
The Bypass Doors located on top of the Inlet Ducts controls the inlet duct airflow and maintains a____to correspond with the variable inlet duct ramps for the most efficient engine airflow.
High pressure
low pressure
Constant pressure
Static pressure
What does an F-15SG engine air induction system comprise of?..
Comprise of a one-dimensional, external compression variable capture area (first ramp), second. ramp, third ramp, and diffuser ramp.
Comprise of a two-dimensional, internal compression variable capture area (first ramp), second ramp, third ramp, and diffuser ramp.
Comprise of a two-dimensional, external compression variable capture area (first ramp), second ramp, third ramp, and diffuser ramp.
Comprise of a one-dimensional, external compression variable capture area (first ramp), second ramp, third ramp, and diffuser ramp.
Which of the following reduce boundary layer air the first ramp (inlet), second ramp and third ramp?
Airflow bypass door
Diffuser ramp
Foreign objects screens
Bleed air exit louvers
What is static position of the inlet ramps, when the aircraft is on ground is?
First Ramp full down, Diffuser Ramp full up, Bypass doors open.
First Ramp full down, Diffuser Ramp full down, Bypass doors closed
First Ramp full up, Diffuser Ramp full down, Bypass doors open
First Ramp full up, Diffuser Ramp full up, Bypass doors closed
What would loss of electrical signal to the first ramp actuator will cause?
The first ramp actuator to extend
The first ramp actuator to retract
The first ramp actuator to stay at its last position
The first ramp actuator to retract only when the airspeed is below Mach 1.5
What is the travel limit for the first ramp?
minus 4 degrees (full up) to plus 11 degrees (full down)
Minus 11 degrees (full up) to plus 4 degrees (full down)
Minus 4 degrees (full up) to plus 27.5 degrees (full down)
minus 27.5 degrees (full up) to plus 4 degrees (full down)
When would the final reduction to subsonic flow occurs in the F-15SG intake?
Oblique shock wave positioned at the inlet duct lip
Oblique shock wave positioned at the first ramp lip
Normal shock wave positioned at the inlet duct lip
normal shock wave positioned at the first ramp lip
How is the actuator lock in retract position when electrical power to the first ramp actuator shutoff valve is removed?
Hydraulically locked by the anti cavitation valve
Hydraulically locked by the inlet check valve.
Mechanically locked by the lock piston.
Mechanically locked by spring loaded mechanical fingers.
What is the position of the inlet ramp when the engine rpm approaches 56-58%?
The first ramp moves to the full up position, the diffuser ramp remains full up, and the bypass door remains opened
The first ramp moves to the full up position, the diffuser ramp remains full up, and the bypass door remains closed
the first ramp moves to the full down position, the diffuser ramp remains full down, and the bypass door remains opened
The first ramp moves to the full down position, the diffuser ramp remains full up, and the bypass door remains closed
What is the effect of ramp and bypass door movement in the F-15SG inlet system?
Ramp and bypass door movement control the velocity and pressure of air in the inlet causing a static pressure rise or compression of the air coming in before it is put into the engine.
Ramp and bypass door movement control the temperature and pressure of air in the inlet causing a static pressure decrease or expansion of the air coming in before it is put into the engine.
Ramp and bypass door movement control the velocity and temperature of air in the inlet causing a static pressure rise or compression of the air coming in before it is put into the engine.
Ramp and bypass door movement control the velocity and pressure of air in the inlet causing a static pressure decrease or expansion of the air coming in before it is put into the engine.
The____ senses aircraft pitot/static pressures, duct pitot/static pressures, angle of attack, total temperature and varying ram position signals.
Inlet Controller (ILC)
Flight Control Computer (FCC)
Flight Data Processor (FDP)
Air Data Processor (ADP)
What is the function of the first ramp (inlet) actuator lock?
Keeps each first ramp locked at the full down position when the aircraft is on the ground and the systems respective engine is shut down.
Keeps each first ramp locked at the full up position when the aircraft is on the ground and the systems respective engine is shut down.
keeps each first ramp locked at the 0 degree when the aircraft is on the ground and the systems respective engine is shut down
keeps each first ramp locked at the full down position when the aircraft is on the ground and the systems respective engine is starting up
What does the F-15SG secondary power system consists of ?
Central Gearbox (CGB)
Left and right AMAD and two AMAD Power Take-Off (PTO) Shafts.
Jet Fuel Starter (JFS)
All are correct
What prevent a pressurized accumulator from bleeding down to a depressurized accumulator?
Check Valve
One way relief valve
One way restrictor
Pressure and vent valve
Describe the JFS gas generator.
A two stage axial turbine driving a single stage centrifigual
A single stage axial turbine driving a single stage axial compressor
a single stage axial turbine driving a single stage centrifigual compressor
A two stage axial turbine driving a single stage axial compressor
What type of combustion chamber used in the F-15SG JFS?
Straight flow, annular type system.
Reverse flow, can-annular type system.
Straight flow, can-annular type system.
Reverse flow, annular type system.
What are the containment provisions incorporated to compressor to prevent damage to the aircraft or personnel in the event of a burst failure of the compressor?
Containment provisions build into shroud and diffuser of the JFS
Special containment rings
A wheel catcher
Containment provisions build into shroud and diffuser with Special containment rings around the JFS
What is the function of the thermal relief in the JFS fuel supply system?.
The valve opens and allowing fuel to flow back to the fuel tank.
The valve opens and allowing fuel to flow back to the JFS tank.
The valve opens and allowing fuel to flow back to the JFS tank.
The valve opens and allowing fuel to flow back to the CFT tank.
How is fuel supply to the JFS being controlled?
By a normally open solenoid operated type JFS Fuel shutoff valve.
By a normally closed solenoid operated type JFS Fuel shutoff valve that is energized open by a low DC voltage supplied during the start cycle by the GCU
By a normally closed solenoid operated type JFS Fuel shutoff valve that is energized open by a low DC voltage supplied during the start cycle by the PMG
By a manually operated fuel shut off valve
How is the JFS fuel accumulator charged?
Manually operated hand pump after each JFS operation.
a electrically operated fuel pump operated from the cockpit after each JFS operation.
JFS boost pumps which operate whenever JFS is running.
Aircraft boost pumps which operate whenever an engine is.running.
Choose the most correct statement describing the high pressure fuel pump for the JFS fuel system.
positive displacement gear type element located in the JFS Fuel Control Unit.
Positive displacement gear type element located in a housing adjacent to the JFS fuel control unit
Positive displacement vane type element located in a housing adjacent to the JFS fuel control unit
Positive displacement vane type element located in the JFS Fuel Control Unit
What is the function of the governor valve in the JFS FCU?
to meter fuel during steady state operation to maintain the JFS at 60 or 100 percent gas generator speed
To meter fuel during steady state operation to maintain the JFS at 60 or 100 percent power turbine speed
To meter fuel during steady state operation to maintain the JFS at 50 or 100 percent gas generator speed
to meter fuel during steady 'state operation to maintain the JFS at 50 or 100 percent power turbine speed
How is the STARTER-READY light indicating to the operator that the JFS is ready for an engine start activated?
By the JFS two way switch at 60 percent gas generator speed.
By the JFS two way switch at 50 percent gas generator speed
By the JFS two way switch at 60 percent power turbine speed.
By the JFS two way switch at 50 percent power turbine speed
With a modified improved JFS ignition control circuit, how much more ignition time is available and how is it being controlled?
The ignition stays longer for approximately 1.5 seconds due to the incorporation of the JFS control timer in the JFS run relay.
The ignition stays longer for approximately 1.5 seconds due to the incorporation of the JFS control timer in the ignition circuit
The ignition stays longer for approximately 0.8 seconds due to the incorporation of the JFS control timer in the JFS run relay.
The ignition stays longer for approximately 0.8 seconds due to the incorporation of the JFS control timer in the ignition circuit
How is JFS start cycle being initiated?
Is initiated by setting the STARTER Switch on the Engine Control panel to "ON" and pulling the Jet Fuel Starter control handle.
Is initiated by pulling the Jet Fuel Starter control handle and pulling the Jet Fuel Starter control handle.
Is initiated by lifting the L/R engine finger lift and pulling the Jet Fuel Starter control handle.
Is initiated by setting the STARTER Switch on the Engine Control panel to "ON" and lifting the L/R engine finger lift
How is Acceleration from 60 to 100 percent Gas Generator Speed being initiated?
initiated by de-energizing the acceleration control valve solenoid.
Initiated by energizing the acceleration control valve solenoid
Initiated by de-energizing the acceleration schedule valve solenoid
Initiated by energizing the acceleration schedule valve solenoid.
Which of the following would result in an termination of JFS operation?
Gas generator exceeding 110 percent of normal operating speed
Automatically after starting the LH engine
Automatically after starting the RH engine
Turbine generator exceeding 110 percent of normal operating speed
How is the starting torque from the JFS power turbine transmitted to the CGB during engine starting?
Transmitted through a bevel gear set to a wet friction clutch from where it is transmitted through a spur to the isolation decouplers
Transmitted through a bevel gear set to a dry friction clutch from where it is transmitted through a spur to the isolation decouplers
is transmitted through a spur gear set to a wet friction clutch from where it is transmitted through spiral bevel gears to the isolation decouplers
Is transmitted through a spur gear set to a dry friction clutch from where it is transmitted through spiral bevel gears to the isolation decouplers
What is the function of the fan assembly in the CGB?
To provide air flow only to cool the CGB oil cooler
To provide air flow only to cool the CGB clutch assembly
To provide air flow to cool the JFS/ CGB compartment
To provide air flow to cool the lubricating oil and portions of the CGB and JFS housings
What is the CGB clutch assembly consist of?
Is a dry multiple disk type and is controlled by the hydraulic clutch control valve
Is a wet multiple disk type and is controlled by the hydraulic clutch control valve
Is a dry single disk type and is controlled by the hydraulic clutch control valve
Is a wet single disk type and is controlled by the hydraulic clutch control valve
Describe the starter clutch assembly.
A disk type clutch assembly that couples the hydraulic starter assembly to gas generator splined shaft during JFS start
A sprag-type overrunning clutch assembly that couples the hydraulic starter assembly to gas generator splined shaft during JFS start
A disk type clutch assembly that couples the hydraulic starter assembly to the spur gear during the initial phase of the JFS start cycle
A sprag-type overrunning clutch assembly that couples the hydraulic starter assembly to the spur gear during the initial phase of the JFS start cycle
What is the function of the overrunning clutch in the isolation de-couplers?
It is to allow power from the CGB to be transmitted to the AMAD's but do not allow power to be transmitted from the AMADs to the CGB.
It is to allow power from the AMAD to be transmitted to the CGB's but do not allow power to be transmitted from the CGBs to the AMAD.
It is to allow disengagement when a torque of 575 ft. Lb is reached
It is to prevent the rotating extension of an isolation decoupler
Which of the following is NOT part of the CGB lubrication system?
Oil reservoir
fuel-oil cooler
Differential speed pump
Sump scavenge pump
What is the function of the pump rotor set (Lube pressure) in the CGB?
The pump rotor set (Lube pressure) provides oil for cooling and lubricating JFS and CGB components
The pump rotor set (Lube pressure) provides oil for operation of the hydraulic clutch control valve
The pump rotor set (Lube pressure) provides oil for operation of the de-couplers
All are correct
How is the hydraulic clutch control valve torque motor positioned during a RH engine start?
The torque motor repositions the flapper to close the right hand nozzle, which restricts the flow to the left end of the director valve.
The torque motor repositions the flapper to close the left hand nozzle, which restricts the flow to the right end of the director valve.
The torque motor repositions the flapper to close the right hand nozzle, which restricts the flow to the right end of the director valve..
The torque motor repositions the flapper to close the left hand nozzle, which restricts the flow to the left end of the director valve
The ________that prevents both isolation decouplers from being pressurized simultaneously
Primary shuttle valve provides a hydraulic interlock
Primary shuttle valve provides a mechanical interlock
Director valve provides a hydraulic interlock
Director valve provides a mechanical interlock
How does the power turbine switch assembly prevent overspeed in JFS/AMAD control system?
By opening the normally closed 110 percent switch whenever JFS power turbine speed exceeds 110 percent
By closing the normally open 110 percent switch whenever JFS power turbine speed exceeds 110 percent
By opening the normally closed 110 percent switch whenever JFS gas generator speed exceeds 110 percent
By closing the normally open 110 percent switch whenever JFS gas generator speed exceeds 110 percent
Where does the power for the JFS ignition system and electrically controlled JFS and aircraft fuel system comes from during JFS start cycle?
From the low voltage load winding of the JFS mounted PMG
From the high voltage start winding of the JFS mounted PMG
From the low voltage load winding of the CGB mounted PMG
from the high voltage start winding of the CGB mounted PMG
Which of the following sub-systems are powered by the JFS hydraulic system?
Engine Starting
Emergency landing gear extension
Emergency brakes
All are correct
Where does the energy required to turn the hydraulic start motor during JFS start is available from?
By two 215 cubic inch self displacing accumulatore that store nitrogen under pressure
by two 215 cubic inch self displacing accumulatore that store hydraulic fluid under pressure
By one 215 cubic inch self displacing accumulatore that store nitrogen under pressure
By one 215 cubic inch self displacing accumulatore that store hydraulic fluid under pressure
When would double bottle starts be necessary?
When the ambient temperature is below 0 degree F
When the ambient temperature is below minus 10 degrees F
When the ambient temperature is below minus 20 degrees F
When the ambient temperature is between minus 30 degrees F to minus 40 degrees F
Which of the following component is NOT mounted to the AMAD?
PC Hydraulic pump
Utility hydraulic pump
Generator Control unit
Integrated drive generator
What is the function of the layshaft in the AMAD system gear train during engine start?
Transmits the input rotational power from the pawl carrier in the CGB to the AMAD/engine driveshaft on the outboard end of the gearbox
Transmits the input rotational power from the pawl carrier in the CGB to the AMAD/engine driveshaft on the inboard end of the gearbox
Transmits the input rotational power from the pawl carrier in the AMAD to the AMAD/engine driveshaft on the outboard end of the gearbox
transmits the input rotational power from the pawl carrier in the AMAD to the AMAD/engine driveshaft on the inboard end of the gearbox
How is slight misalignment between the engine and the AMAD being provided for?
Through a diaphragm type flexible coupling on aircraft end of the shaft only, that permits 1 degree 40 minutes of continuous misalignment
Through a diaphragm type flexible coupling on engine end of the shaft only that permits 3 degrees 34 minutes of continuous misalignment
Through a diaphragm type flexible coupling on both ends of the shaft that permits 1 degree 40 minutes of continuous misalignment
Through a diaphragm type flexible coupling on both ends of the shaft that permits 3 degrees 34 minutes of continuous misalignment
How can double bottle starts be performed on the JFS accumulator?
By pulling the starting handle to the first detent
By pulling the starting handle to the second detent
By rotating the handle 45 degrees counter-clockwise and pulling the handle.
By rotating the handle 45 degrees clockwise and pulling the handle.
What are the systems that are NOT powered by the JFS/ESS 28VDC bus?
AMAD/ JFS Bay fire warning and extinguishing system
Engine Bay fire warning and extinguishing system
Ground Intercom system
Utility flood light
What is the RPM to advance the throttle to Idle during engine starts?
15 percent RPM
18 percent RPM
23 percent RPM
30 percent RPM
What is the recommended engine rpm for engagement of the JFS in the air and why?
Less than 30 percent, this is to prevent damage to the isolation decoupler
Less than 40 percent, this is to prevent damage to the isolation decoupler
less than 30 percent, this is to prevent damage to the AMAD layshaft
Less than 40 percent, this is to prevent damage to the AMAD layshaft
What is the most important design factor in the Fire Protection System?
Extinguishment
Detection
Containment
Prevention
What helps make the fuel lines fire safe?
Carbon fibre protection
Heat shields
Titanium shrouds
Kevlar
What are the design objectives of the fire detection system?
To provide fire warning detection for JFS/AMAD Fire Zone.
To provide fire warning detection for Left Hand Engine Fire Zone
To provide fire warning detection' for Right Hand Engine Fire Zone
All are correct
What are the differences in fire warning indications between the forward and aft cockpit?
There is no difference between both cockpits..
Both cockpits have left and right main engine fire lights. Only the aft cockpit has a fire light for the AMAD/JFS bay.
Both cockpits have left and right main engine fire lights. Forward cockpit has a fire light for the AMAD/JFS bay, while aft cockpit has a fire light for AMAD bay only
Both cockpits have left and right main engine fire lights: Only the forward cockpit has a fire light for the AMAD/JFS bay.
How do JFS compartment fires be extinguished using fire extinguisher?
By discharging fire extinguishers into the JFS inlet
By discharging fire extinguishers into the JFS exhaust
By discharging fire extinguishers into the JFS fire access door
By discharging fire extinguishers into either engine fire doors.
What are the factors that reduced the danger of fire?
Observation and Prevention
Material component and environment
Design of the shape and Material
Prevention, Detection, Containment, Extinguishment
What type of material is used for heat exchanger cooling air ducts so as to resist engine compartment fire?
Stainless steel
Titanium
Aluminium
Tungsten
What is the sequence audio warning when the the spring loaded fire extinguisher discharge switch is selected to "TEST".
WARNING - AMAD FIRE, a short pause, repeat: WARNING - ENGINE FIRE - RIGHT, short pause, repeat: WARNING - ENGINE FIRE - LEFT, a short pause, repeat.
WARNING - ENGINE FIRE - LEFT, a short pause, repeat: WARNING - ENGINE FIRE - RIGHT, a short pause, repeat. WARNING - AMAD FIRE, a short pause, repeat:
WARNING-AMAD FIRE, a short pause, repeat: WARNING-ENGINE FIRE - LEFT, a short pause, repeat: WARNING - ENGINE FIRE-RIGHT, a short pause, repeat.
WARNING - ENGINE FIRE - RIGHT, a short pause, repeat: WARNING - ENGINE FIRE- LEFT, a short pause, repeat. WARNING-AMAD FIRE, a short pause, repeat:
What are the conditions that would cause the right Multipurpose Display (MPD) to display a FIRE SENSOR warning to the pilot?
Loss of detection capability due to the loss of gas pressure on all six responder that results in the integrity switch opening.
Loss of detection capability due to the loss of gas pressure that results in the integrity switch opening .
Loss of detection capability due to the loss of gas pressure that results in the integrity switch closing
Loss of detection capability' due to the loss of gas pressure on all six responder that results in the integrity switch closing
Which of the following is not one of the zone for fire detection?
JFS
AMAD
Left/Right Engine
CGB
What type of fire extinguishing agent is used for the on-board fire extinguisher for the F-15SG?
Carbon Dioxide Gas (CO2)
Dry Powder agent
Hydrazine
Halon
How is the operation of the on-board fire extinguisher being controlled?
The fire detection system discharges the extinguishant automatically
By the pilot through switches on the fire warning panel
By the DEC when it senses a high turbine blade temperature
By the AIU, together with the overtemperature voice warning
What type of gas does the outer core of the fire detection element are filled with?
Hydrogen
Helium
Halon
Nitrogen
What is the immediate action when an AB burn through is detected by the Left or Right AB Burn Thru detection element?
Shutdown the engine by placing the throttle in the "OFF" position
Press the L/R AB BURN THRU Push Light and put the fire extinguisher discharge switch to "Discharge"
Retarding the throttles out of AB range to extinguish the fire and allow the L or R AB BURN THRU detection element to cool turning off the L or R BURN THRU lights
Throttle to OFF and press the L/R AB BURN THRU Push Light and put the fire extinguisher discharge switch to "Discharge"
What happen when the "LH Engine" fire extinguisher discharge switch is select to "DISCHARGE"?
This action fires a squib in the discharge outlet port to rupture a frangible disc and release the extinguishing agent into the right engine bay.
This action fires a squib in the discharge outlet port to rupture a frangible disc and release the extinguishing agent into the left engine bay.
This action fires a penetrator to rupture a frangible disc and release the extinguishing agent into the right engine bay.
This action fires a penetrator to rupture a frangible disc and release the extinguishing agent into the Left engine bay.
What is the main function of the Aircraft Fuel System in the F-15SG?
To provide fuel to the Left engine only.
To provide fuel to the right engine only.
To provide fuel to both Left and Right engine only.
to provide fuel to both engine and Jet Fuel Starter.
Which is correct for Conformal Fuel Tanks.
Conformal Fuel Tanks are attached to the aircraft wings and is jettisonable
Conformal Fuel Tanks are attached to the aircraft wings and is not jettisonable
Conformal Fuel Tanks are attached to the aircraft fuselage and is not jettisonable
Conformal Fuel Tanks are attached to the aircraft fuselage and is jettisonable
When normal fuel transfer fails, how is fuel from the two wing tanks able to be transferred to the engine fuel feed tanks
By activating stand by fuel transfer pump.
By gravity transfer interconnect valves.
By Conformal Fuel tanks transfer pump.
By the other wing tank transfer pump.
Internal Fuel tanks are normally presurrized through air tapped from the ECS system. It will prevent ______.
Fuel boiling and vaporization
Fuel boiling and ignition
Fuel leaking and vaporization
Fuel contamination and leaking
Lubricating oil to both AMAD & IDG and hydraulic oil to Utility, PCI & PC2 is cooled by_____.
Fuel boiling and vaporization
Fuel/ Oil Heat exchanger
Fuel cooled Heat Exchanger
No cooling required
All primary flight control hydraulic power are provided by _____.
Power Control System 1
Power Control System 1 and 2
Power Control System 1, 2 and Utility 1 hydraulic system
Power Control System 1 & 2 and Utility 1 &2 hydraulic system
How does the Reservoir Level System (RLS) work when there is a leak in one of the aircraft hydraulic system?
Aircrew will identify the source of the leak and electrically switching the RSL to another hydraulic system from the cockpit,
Aircrew will identify the source of the leak and manually turn on the RSL on affected hydraulic system..
There is nothing the Aircrew can do but to declare an emergency.
The RSL system is automatic, no action is required from the Aircrew.
The Hydraulic fluid in the reservoir can be drained off along with free air by pulling the button next to the reservoir.
Drain
Bleed
Reset
Shut Off
The Utility System powers hydraulically -operated subsystems and automatically switches into Primary Fight control subsystem if____hydraulic power is lost
Power Control System 1 only
Power Control System 2 only
Power Control System 1 or Power Control System 2
Utility System 2
Both JFS accumulators are charged by the circuit B of aircraft _____system
Utility System
Power Control System 1.
Power Control System 2
Utility System 2
Bleed Air is extracted from left and right engine____ stage compressor discharge port for airframe use
Third
Sixth
Ninth
Tenth
The extracted bleed air is used for____.
Air source for ECS, downstream heating requirement and high pressure air for downstream auxiliary system
Air source for ECS, downstream cooling requirement and high pressure air for downstream auxiliary system
Air source for ECS, downstream cooling requirement and low pressure air for downstream auxiliary system
Air source for ECS, downstream heating requirement and low pressure air for downstream auxiliary system
When the TEMP switch on the Air Conditioning Control Panel is turn to OFF position
All air supply to the cockpit will be turn OFF
Avionics cooling will switch to RAM air
Canopy seal, fuel pressurisation, anti-G and windshield anti-ice will continue to operate
All are correct
What will happen to when the EMERG Vent handle is rotated 45 deg ccw, engine is running and aircraft is on ground?
There will not have air conditioning air flowing.
Normal air conditioning will still be in operation until the EMERG Vent handle is pulled.
ACMU cooling will ceased operation.
Both air conditioning and ACMU cooling will cease operation.
What are the 2 components mounted on the Airframe Mounted Accessories Drive that provides electrical power to the aircraft electrical system.
Generator Control Unit, Integrated Drive Generator
Constant Speed Drive, Integrated Drive Generator
Generator Control Unit, Permanent Magnet Generator
Constant Speed Drive, Permanent Magnet Generator
How does the aircraft Left and Right electrical generator being controlled in the cockpit?
The generator is activated automatically, no control is required.
The Left and Right generator is controlled by the Left and Right generator control unit.
The Left and Right generator is controlled by the GEN switch on the Engine Control Panel
The Left and Right generator is controlled by the Left and Right GEN switch on the Engine Control Panel
How does the aircraft Emergency Generator being powered to supply electrical power to essential equipment/system.
Hydraulic motor supplied by a Ram Air Turbine.
Hydraulic motor supplied by the aircraft Utility hydraulic pressure.
Hydraulic motor supplied by the aircraft hydrazine system
Aircraft mounted accessories drive
The Emergency Generator will automatically shut down after the first generator comes on line during a ground start without external power in_____seconds.
10
20
30
40
How does the cockpit Ground Power Switch function?
Controls electrical power to all the aircraft electrical system when the aircraft is on ground.
Controls a group of system and/ or instruments and prevents unnecessary operation of the systems/ instruments when using ground power.
controls power to the aircraft ground support equipment.
Controls all the aircraft instrument system only when the aircraft is on ground.
How to carry out a ADCP reset if the system stops working?
By turning OFF and ON the Emergency Generator power switch.
By turning OFF and ON the main battery switch:
By the ADCP reset switch on the Ground Power Switch.
By the ADCP reset switch on the Sensor Control Panel.
In which engine system/s where the ADCP performs a critical role?
Anti-ice System
Asymmetric Thrust Departure Prevention System
Digital Engine Control
All are correct
AIU 1 communicates with various engine system/ components to provide caution or warning to the pilot, it will also illuminate the_____and Engine Caution lights..
MASTER CAUTION
AIU CAUTION
ADCP CAUTION
MUX CAUTION
A Built-In Test can be performed by pressing a switch on the_____ in the BIT page.
Ground Power Switch
Engine Control Panel
ECS Control Panel
MPD/MPCD
Which function provides a more detailed checkout of a system than an initial BIT?
Pre-flight BIT (PBIT)
Maintenance BIT (MBIT)
Engine BIT (EBIT)
Auto BIT (ABIT)
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