DADS DY (PPD)
The counter reading reads 100255 revolutions and after 4 hours the reading became 123055 revolution. Find the average RPM of your engine.
93 rpm
95 rpm
97 rpm
100 rpm
What position of misalignment are checked in crankshaft deflection?
Horizontal misalignment only
Both horizontal and vertical misalignment
Vertical misalignment only
Either horizontal and vertical misalignment
By seeing your indicator diagram, if both the compression and firing pressures are high, water are the possible causes?
Fuel pump leaking and injector nozzle blocked
Overload of the engine and exhaust valve opening too late
Leaking exhaust valve and burnt piston crown
Low scavenge pressure and overload of the engine
If your main engine is experiencing fuel pump leaking, what happened to your compression and firing pressures?
Compression pressure is high but firing pressure is low
Compression pressure is normal but firing pressure is low
Compression pressure is low but firing pressure is normal
Compression pressure is normal but firing pressure is high
Which device is needed to supply enough air to 4 stroke diesel engine?
Blower
No need extra device
Induced fan
Forced fan
During combustion, which part of the piston received the expansion of gases that stands to force the piston to moved downward?
Piston ring
No answer is correct
Piston skirt
Piston pin
The following types of scavenging, which is more efficient in terms of removing all combustion products?
Loop flow
Uniflow
Cross flow
Either cross flow or uniflow
Which type of engine governor is the most advance in construction?
Mechanical
Electronic
Hydraulic
Electro-hydraulic
In order to have a combustion in marine steam boiler, which of the element are necessary? I.Oxygen in the air II. Diesel oil. III. Electric spark in the burner.
Only or iii are correct.
All I, ii and iii are correct.
Only I and ii are correct.
Only ii and iii are correct.
Your Main 2-Stroke diesel engine is running at Full ahead in 4 hours. Determine the Average RPM if the Initial and Final Readings are 976000 and 000900 revolutions respectively.
95 rpm
No answer is correct.
98 rpm
100 rpm
What is the result of your indicator diagram for a leaking exhaust valve?
Compression pressure is low but firing pressure is high.
Both compression and firing pressures are low.
Both compression and firing pressures are high.
compression pression is high but firing pressure is low
Which type of scavenging is commonly used for MC and ME Engines?
crossflow
Uniflow
loop flow
Valveless
Which of the following statements is/are correct about Modern Large Marine 2- strokediesel engines? I.They are considered slow type engines. ii. They cannot produce enough air during suction of the piston. iii. Compression of air is the source of heat for combustion.
All I, ii, and ill are correct
Only I and iii are correct.
Only ii and I are correct.
In what event can a chief engineer manipulate the engine governor?
Any time
Only during emergency
During dry dock
During severe storm
On board the vessel, diesel engines can be started by which of the following device?
Lead acid battery
All answer are correct
Hydraulic accumulated pump
Compressed air
Part of the main diesel engine which seals the combustion products and the lubricating oil?
Piston skirt
None of the answer mention
Piston grooves
Piston crown
In large 4-stroke diesel engine, which part connects the piston and crank shaft?
Crosshead
Connecting rod
Piston rod
Piston pin
In modern large ships using large 2 stroke diesel engine, blowers should be in which mode during maneuvering?
I. Manual
Ii. Automatic
Either I or ii is correct
On board the vessel, Engine governors are used for which of the following purposes?
I. Regulate engine fuel consumption.
All answer are correct
Iii. Achieve high efficiency.
Ii. Control engine speed
On board the vessel, diesel oil and clean HFO are stored in which of the following fuel tanks?
Settling tank
Service tank
Storage tank
Double bottom tank
Reducing the friction between engine moving parts is the main function of which system?
All answers written are correct
Lubrication system
Cooling system
Fuel oil system
In machiner space, which of the following are the main function of engine cooling system?
I. It removes excess heat from the engine
All answers written are correct
Ii. .it maintains the engine operating temperature where it works most efficiently.
Iii. .it brings the engine up to the right operating temperature as quickly as possible.
During one hour notice for departure, which of the following systems must be in normal operation?
I. Cooling System
All answers written are correct
Ii. Fuel oil system
Iii. Lubrication system
In Modern Ships, which of the following Main Diesel Engine is considered Cam less?
I. MC engines
Ii. ME engines
Either I or ii is correct.
Neither I nor ii is correct.
Modern large Diesel engine during full load, the air going inside the cylinder is supplied by which means?
Ii.Blower
I. Turbo charger
Either I for ii is correct.
Neither I nor ii is correct.
Which of the following Modern Marine Diesel Engine is bigger in construction with same power?
I.ME engine
II. MC engine
They are the same
They are not the same
Which of the following is NOT correct about ME engine?
Can used either diesel or fuel oil.
Fuel is injected by means of cam shaft.
More complex than ME engine
It uses uniflow type of scavenging
Power Chief is commonly used by which of the following Large Marine Diesel Engine?
MC engine
Either I or ii is correct.
ME engine
Neither I nor ii is correct.
Which position of the piston when the Timing of injection is made?
I. Top dead center
III. Before Top dead center
II. Bottom dead center.
All I, ii, and iii are correct.
In correcting injector adjustments, which of the following is the most reliable source?
I. Internet.
Ii. Instruction manual
Either I or ii it is correct.
Neither I nor ii is correct.
Correct Adjustment of injection timing will result to which of the following?
I. Higher cylinder pressure.
All I, ii, and iii are correct.
Ii. Lower exhaust temperature.
Iii. Increased fuel efficiency.
Does gas turbine perform compression stroke in order to create heat for combustion?
Yes
No
If your main 2 stroke diesel engine is experiencing early ignition, what will be the outcome of your firing and compression pressures?
Compression pressures low but firing pressure high
Compression pressures normal but firing pressure high
Both high
both low
Determine the daily consumption in cu.m of the main engine in which is running at full speed where the fuel meter reading at 1200 is 1453 cu. M after 24 hours it became 1847 cu.m
18.75
16.42
17.58
15.29
The Indicated power of your DG1 in 255 hp. Find the actual power produced if the engine mechanical efficiency is 75%
200.15 hp
191.25 hp
187 25 hp
194. 35 hp
Turning gear serves as an interlock of our Main Engine when it is engaged. Which of the following is/are correct about the interlocking of the Turning gear?
I. It prevents the engine from being started.
Both I and ii are correct
Ii. It allows the starting air to reach the engine.
Both I and ii are incorrect
Which of the following types of protection were installed in a Modern Main propulsion?
I. Alarm
All I,ii, and iii are correct.
Ii Slow down and shut down
Iii. Starting interlock
Shipboard marine diesel engine parameters are the following, EXCEPT?
specific fuel consumption
Engine maker
indicated mean effective pressure
Compression ratio
Which of the following were Engine Performance Parameters?
I. Power
All I, ii and iii is are correct.
Iii. Specific fuel consumption
Ii. Torque
Which of the following device is used to determine the indicator diagram of each cylinder?
Ii. Pressure indicator
I. Engine indicator
Either I or ii is correct.
Neither I nor ii is correct
Which instrumental is commonly used for measurement of crankshaft deflection?
Vernier caliper
Dial gauge
Micrometer
All answers mention are correct
Your diesel generator has an actual power of 1250 horsepower find its equivalent in kilowatts?
944.8
932. 5
940.7
935.4
The MEP of your diesel engine is 120 bars find for its equivalent in kilogram per square centimeter?
127. 2
122.4
124.5
125.7
Solve for the lhp if the main diesel engine has a friction loss of 12% of bhp and the bhp is 12,728 hp.
14,255.4 hp
14,728.2 hp
13, 152.8 hp
13, 475.8 hp
Why modern 2 stroke diesel engine is better than 4 stroke diesel engines
I. Less maintenance
All I, ii, and iii are correct
Ii. reliability
Iii. efficiency
As cadet in the engine room what is the first thing you will do when you hear an alarm because of malfunction?
shout that there is alarm
Acknowledge the alarm
rectifies the malfunction
Look for 1st engr.
The AUTO system of SW is running in normal condition but suddenly an alarm sounded because of main SW pump failure, what is the FIRST event to happen?
SW temperature will rise
Standby pump will run automatically
SW temperature will become low
All answers are correct
Deflections of main diesel engine are measured by detecting the misalignment of which of the following parts?
Main bearings
Crankshafts
Piston rods
connecting rods
What is the characteristic of gasoline?
Flammable
all of the above
Low flash point
Inflammable
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