Catfish Species and genealogy
If you had four (4) resistors (100 ohms each) in a series circuit with a voltage source of 25 VDC, what should be the current in that circuit?
625 mAmps DC.
2.5 mAmps DC.
6.25 mAmps DC.
16 Amps DC.
1.6 Amps DC
What would happen to a circuit, that has 4 resistors (125 ohms each) in series, and one of the resistors were to open up?
The circuit would open.
The circuit voltage would decrease.
The circuit voltage would increase.
The circuit current would increase.
The circuit current would decrease.
Which answer is INCORRECT, when using a multi-meter to measure for resistance you should?
Make sure that the circuit being checked is de-energized.
Make sure that the circuit being checked is energized.
Set the range selector to either X1 or X100.
Connect leads together and push the "Push for Ohms" button.
Adjust meter to read zero ohms with leads connected together.
What setting is the code function selector of a Triplett meter set on to indicate the code on the track?
On time
Rate
Norm
Hold
Follow
The purpose of a transformer is to;
Change VAC to VDC
Change VDC to VAC.
Step-up or step-down VAC voltage.
Step-up or step-down VDC voltage.
Change steady energy to coded energy.
Which of the following is INCORRECT?
A trickle charge is a continuous input of current to a storage battery to compensate for internal losses only.
A trickle charge is a continuous input of current to a storage battery.
Batteries connected directly across rectifiers and the load are under floating charge.
Answers "A" and "C" only.
Answers "B" and "C" only.
When checking for a negative ground on a set of batteries, the first check you should make is to set your meter;
To VDC - with the negative lead on the negative buss and the positive lead to ground.
To VDC - with the negative lead to ground and the positive lead to the positive buss.
To DC amps - with the negative lead on the negative buss and the positive lead to ground.
To DC amps - with the negative lead to ground and the positive lead to the positive buss
To VDC - with the negative lead to the negative buss and the positive lead to the positive buss.
What is the purpose of cross-megging a cable?
To determine if any of the conductors are going to ground.
To determine if the conductor is continuous to the other end of the cable.
To tag the cable properly.
To determine if any conductors are grounded to any other conductors.
To determine if any conductors are open.
What is the minimum allowable resistance to earth on low voltage working signal Conductors?
1 milliamp.
200,000 ohms.
500,000 ohms.
1 meg ohm.
Not more than 1 meg ohm and less than 500,000 ohms.
When making AMT 27 Test 18, what must you be concerned about?
Taking a voltage reading when a train is approaching.
Get time from the Operator/Dispatcher when taking current readings to ground.
Any ground .001 ampere or greater on low voltage energy sources.
Answers 'B' and 'C' only.
Answers 'A', 'B' and 'C' only.
When drawn on a circuit plan, what is the normal position of magnetic stick contacts in a GRS relay?
Up.
Down.
Left.
Right.
None of the above
Who authorizes you to apply jumpers to a relay or bridge relay contacts?
Operator or Dispatcher.
Division Engineer.
CADE C&S, Supervisor C&S or Asst. Supervisor C&S.
Foreman C&S.
Inspector C&S.
Which statement is INCORRECT?
DC neutral relays are designed to respond to direct current without observing polarity.
Magnetic stick relay contacts are either in the normal or reverse position.
When a DC code responsive relay has no energy applied to its coils, the contacts will stay in the last position they were in.
A magnetic stick relay contacts will remain in the last position it was poled.
None of the above.
What is the purpose of capacitors/condensers placed across the contacts of coding Relays?
To correct the 'on-time percentage' of the relay.
To make the relay pick-up faster.
To make the relay drop-away slower.
To reduce arcing and burning of the contacts.
To effect the timing characteristics of the relay.
Define "Signal Indication"?
A fixed signal used to govern the approach of a train to a home signal.
A fixed signal displayed to trains at the entrance of a block to govern use of that block.
The required action conveyed by the aspect of a signal.
The signal appearance, which conveys an indication.
None of the above.
Define "Signal Aspect"?
A fixed signal used to govern the approach of a train to a home signal.
A fixed signal displayed to trains at the entrance of a block to govern use of that block.
The required action conveyed by the aspect of a signal.
The signal appearance, which conveys an indication.
None of the above.
What signal is associated with 120 code?
Slow Clear.
Medium Clear.
Limited Clear.
Clear.
Answers "B" and "C" only.
Which answer is CORRECT?
With a Medium Approach Signal there will be an Approach Medium Cab Signal.
When making a diverge move over a #20 switch and the ADR relay is energized, you would expect to have Medium Clear Signal at the Interlocking.
When making a diverge move over a #20 switch and the ADR relay is energized, you would expect to have a Limited Clear Signal at the Interlocking.
With a Slow Clear Signal there will be a Clear Cab Signal for the entire train move.
With a Slow Clear Signal there will be a Clear Cab Signal after the train passes the switches.
What is the purpose of the RCSR relay?
To request a signal.
To check the route in the interlocking only.
To check the route in and outside the interlocking.
Indicates you have a Stop Signal.
Indicates reverse indication of a switch
According to the AMT 27 Test 24C, what is the minimum allowable axle current on the entering end of a track circuit?
2 amps.
2.5 amps.
2.8 amps.
12 amps.
20 amps.
In accordance with the AMT 27 Test 24B, what is the minimum all track circuits MUST shunt at?
25 ohms.
15 ohms.
10 ohms.
.06 ohms.
20 ohms.
When testing insulated joints, at what level or meter reading do you condemn the Joint?
.020 amperes.
.06 ohms.
Minimum 2 amps.
.15 amperes.
Visual inspection only.
With a clear signal displayed in a interlocking, how do you measured axle current when making AMT 27 Test 24C?
Take a reading with a voltmeter across the rails of the entering (relay) end.
Take a reading with an ammeter across the rails of the entering (relay) end.
Take a reading with a voltmeter across the rails of the leaving (feed) end.
Take a reading with an ammeter across the rails of the leaving (feed) end.
Answers B and 'D' only.
Which of the following could be a possible cause for a TOL?
A requested signal that has been canceled and is in time.
If you find one broken side lead on an impedance bond.
A broken bond wire on a shunt fouling circuit.
A current reading across a non-insulated joint.
A voltage reading across an insulated joint.
Which AMT 27 Test do you check for track circuit polarity?
AMT 27 Test 24A.
AMT 27 Test 24B.
AMT 27 Test 24C.
AMT 27 Test 24D.
AMT 27 Test 24E.
On a TRU II track circuit with an ammeter across the track fuse, with the fuse removed, what reading should be obtained?
1.0 to 1.3 amps.
2.5 to 3.0 amps.
2.0 amps minimum.
1.7 to 1.9 amps.
None of the above.
On a TRU II track circuit, what reading should be obtained on the TRU OUT + and TRU OUT -?
12 to 16 VAC steady.
12 to 16 VDC steady.
110 VAC steady.
5.8 to 6.5 VAC steady.
1.7 to 1.9 amps.
With the track circuit occupied, what reading should you find across the local input terminals of a TRU Il unit?
12 to 15 VAC coded.
12 to 15 VDC coded.
110 VAC coded.
10 VAC steady.
110 VDC steady.
The TRU OUT relay reading must not exceed what voltage with 3-amp fuse Removed?
12 VDC.
6 VDC.
2.5 VDC.
3 VAC.
3 VDC.
A relay designed to respond to direct current without observing polarity is?
DC magnetic stick relay.
DC neutral relay.
DC biased neutral relay.
DC polar relay.
DN11 relay.
What type of track circuit is a TRU Il circuit?
Steady VAC
Steady VDC
Coded VAC
Coded VDC
None of the above.
What type of relay is a TRU Il track relay?
Magnetic stick.
DC.
AC
Polar.
DC quick pick-up.
Insulated joints are used to:
Separate rectifier energy.
Separate track circuit energy.
Separate house cable energy.
Answers "A" and "B" only.
Answers "B" and "C" only.
What effect can a broken bond wire have on a track circuit?
It can cause the circuit to show occupied.
It can cause the circuit to show occupied sometimes.
It can cause a loss of the cab signals.
It can drop the input voltage to the track relay.
All of the above.
With both series fouling wires broken, what could happen to the track circuit?
It would cause a TOL.
It could cause a TOL.
It would cause a TOL when the switch is reverse only.
The track circuit voltage and current would lower.
None of the above.
Select the CORRECT response:
The train always enters the track circuit at the relay end first.
The train always enters the track circuit at the feed end first.
The TRU II track relay (TR) will energize with coded energy.
The TRU Il track relay (R) will energize with only steady energy.
None of the above.
When a TRU Il is used in coded track circuit territory, what equipment must be Added?
LOS-5.
Reactor.
RC network.
DC network.
Code Reset Module.
In accordance with the AMT 27 Test 24B, when is it necessary to report the minimum shunting sensitivity of a TRU II track circuit to the Supervisor C&S?
More than .25 ohms.
More than .15 ohms.
More than .10 ohms.
More than .06 ohms.
More than .20 ohms.
With the track circuit clear, what reading should you find across the local input terminals of a TRU II unit?
12 to 15 VAC coded.
12 to 15 VDC coded.
110 VAC coded.
110 VAC steady.
110 VDC steady.
When measuring DC current, the multimeter should be connected in what way?
In series observing proper polarity.
In parallel observing proper polarity.
In series without needing to observer polarity.
In parallel without needing to observe polarity.
None of the above.
How many input(s) and output(s) does a TRU Il track circuit have?
1 input / 2 outputs
2 inputs / 1 output
2 inputs / 2 outputs
2 AC inputs / 2 DC outputs
1 input / 1 output
What voltage would you expect to find on the local input of a US&S Phase Selective Unit?
5.8 to 6,5 VAC steady.
110 VAC steady.
110 VAC coded.
5.8 to 6.5 VAC coded.
12 to 15 VAC coded.
On a GRS Phase Selective track circuit, what voltage is the Phase Reference output and what terminals would you find them on?
110 VAC on terminals REF+ and REF-.
5.8 to 6.5 VAC on terminals REF+ and REF-.
1.2 to 1.8 VDC coded on terminals R and R-.
5.8 to 6.5 VAC steady on terminals R to R+
1.2 to 1.8 VDC coded on terminals R to R+.
What are the phase output terminals on a GRS Phase Selective Unit?
R and R-.
R and R+.
R- and R+.
Reft and Ref-.
-IN and +100.
What is the normal output voltage of a GRS Phase Reference Transformer?
1.2 to 1.8 VDC coded.
1.5 to 2.3 VDC coded.
110 VAC steady.
5.8 to 6.5 VAC steady.
12 to 15 VAC coded.
What reading should you find on the track input terminals of a GRS Phase Selective Unit?
1.2 to 1.8 VDC coded.
1.5 to 2.3 VDC coded.
110 VAC steady.
5.8 to 6.5 VAC steady.
12 to 15 VAC coded.
What is the purpose of series fouling wires in a crossover?
Cab pick-up
Extension of the track circuit into the turnout.
Broken rail protection.
Answers 'B' and 'C' only.
Answers 'A' & 'B'and 'C'.
In order to energize the TIFBPR, which of the following conditions must exist?
TBPR energized and TFPR de-energized.
1BPR and TFPR poled normal.
TBPR de-energized and TFPR energized.
TBPR and TFPR de-energized.
TBPR and TFPR energized.
What relay(s) changes the direction of traffic within the GRS Phase Selective track Circuit?
AFR/BFR.
ADR/BDR.
CTR.
TBPR.
TFPR.
What are the track output terminals on a US&S Phase Selective track circuit?
1 and 2.
4 and 5.
11 and 10.
None of the above.
9 and 10.
What size fuse is located on the W-400 track transformer feeding the TRU If unit?
1 amp.
3 amp.
6 amp.
15 amp.
30 amp.
What is the position of the contacts in a GRS Phase Selective interlocking track relay when the circuit is occupied?
50 code.
75 code.
Normal.
Reverse.
Down.
What are input(s) and output(s) of a TRU II track circuit?
Local VAC steady input / track and local VDC outputs.
Local VAC steady input / local VDC output.
Local VAC coded and track VAC coded inputs / local and track VDC outputs.
Local VAC steady and track VAC coded / VDC steady relay output.
None of the above.
How many inputs) and outputs) will you find on a US&S Phase Selective Unit?
1 input / 1 output.
2 inputs / 2 outputs.
1 input / 2 outputs
2 inputs / 1 output.
None of the above.
On a GRS Phase Selective track circuit, what voltage should you have on the track output terminals?
1.2 to 1.8 VDC coded.
1.5 to 2.3 VDC coded.
110 VAC steady.
5.8 to 6.5 VAC steady.
12 to 15 VAC coded.
On a US&S Phase Selective Unit, what voltage do you expect to find on the track output terminals?
1.2 to 1.8 VDC coded.
1.5 to 2.3 VDC coded.
1.25 to 2.5 VDC coded.
5.8 to 6.5 VAC steady.
12 to 15 VAC coded.
Which of the following is not a standard cab signal code rate?
75.
120.
180.
50.
None of the above.
What are input(s) and output(s) of a TRU II track circuit?
Local VAC steady input / track and local VDC outputs.
Local VAC steady input / local VDC output.
Local VAC coded and track VAC coded inputs / local and track VDC outputs.
Local VAC steady and track VAC coded / VDC steady relay output.
None of the above.
How many inputs) and outputs) will you find on a US&S Phase Selective Unit?
1 input / 1 output.
1 input / 2 outputs.
2 inputs / 1 output.
2 inputs / 2 outputs.
None of the above.
On a GRS Phase Selective track circuit, what voltage should you have on the track output terminals?
1.2 to 1.8 VDC coded.
1.5 to 2.3 VDC code.
110 VAC steady.
5.8 to 6.5 VAC steady.
12 to 15 VAC coded.
On a US&S Phase Selective Unit, what voltage do you expect to find on the track output terminals
1.2 to 1.8 VDC coded.
1.5 to 2.3 VDC coded.
1.25 to 2.5 VDC coded.
12 to 15 VAC coded.
5.8 to 6.5 VAC steady.
The GRS Transformer can be utilized as;
Track Transformer.
Signal Lighting Transformer.
Phase Reference transformer.
Auto Transformer.
All of the above
On a US&S Phase Selective track circuit, what transformer do you adjust when making AMT 27 Test 24?
Auto Transformer.
Feed Track transformer.
Relay Track transformer
Phase Reference transformer.
Line Step transformer.
On a GRS Phase Selective track circuit, which transformer is used to adjust axle Current?
Track Transformer.
Phase Reference XFMR.
Line Step Transformer.
SC XFMR.
Track XFMR.
What are the track output terminals on a GRS Phase Selective Unit?
R and R-.
R and R+.
R- and R+.
Reft and Ref-.
-IN and +100.
How many wires are needed for the phase reference between track circuit locations in ABS territory?
2 cable wires.
4 cable wires.
6 cable wires.
8 cable wires.
57 composite cable.
US&S Phase Selective track circuit uses what type of relay for its track relay?
DC biased relay.
DC neutral relay.
DC code following relay
AC neutral relay.
None of the above.
Define "Distant Signal"?
A block signal that is activated either by track circuit or in conjunction with interlocking or controlled point circuits.
A signal located in the engine control compartment and which indicates track occupancy or condition.
A fixed signal displayed to trains at the entrance of a block to govern use of that block.
A roadway signal used to govern the approach to another signal.
A fixed signal used to govern the approach of a train to a home signal.
A railroad employee assigned to control and issue orders governing the movement of trains on a specific segment of railroad track in accordance with the operating rules of the railroad that apply to that segment of track is an?
Control Operator.
ADE C&S
Supervisor C&S
Train Dispatcher.
None of the above.
Which one of the following is the correct signal aspect associated with its code rate.
Clear - 180 code, Approach Medium - 120 code, Medium Approach - 75 code.
Clear - 180 code, Medium Approach - 120 code, Approach - 75 code.
Clear - 180 code, Limited Clear - 180 code, Medium Clear - 120 code, Approach Slow - 75.
Clear - 180 code, Approach Limited - 120 code, Slow Approach - 75 code.
Clear - 180 code, Advance Approach - 120 code, Approach Medium -75 code.
The purpose of AMT 27 Test 24 is to;
Insure that the track circuit is not over energized.
Insure that the track relay is in its most restrictive state when the circuit is occupied.
To insure that ALL track circuit connections are secure and tight.
Answers "A" and "B" only.
Answers "A", "B" and "C" only.
How can you test an impedance bond to determine if it is properly balanced?
Use a clamp on ammeter on the (east or north) side leads and then on the neutral leads, compare the two readings, they should equal.
Use an AC voltmeter to measure the voltage from both sides of the impedance bond side leads to the neutral leads, they should be equaled.
Check the on-time percentage of the track relay.
Answer 'A' & 'B' only.
Answer 'A' & 'B' and 'C' only.
How are cables read from the CIH to the function end and for express cables from location to location?
CIH is read clockwise and function end is counterclockwise, express cables are read clockwise on the north (east) end and counterclockwise on the south (west) end.
CIH is read counterclockwise and function end is clockwise, express cables are read clockwise on the north (east) end and counterclockwise on the south (west) end.
CIH is read clockwise and function end is counterclockwise, express cables are read clockwise on the south (west) end and counterclockwise on the north (east) end.
CIH is read counterclockwise and function end is clockwise, express cables are read clockwise on the south (west) end and counterclockwise on the north (east) end.
The CIH is read always clockwise whether it is express or not.
Which test would you use to check for permitted insulation resistance to ground or between conductors'?
AMT 27 Test 18.
AMT 27 Test 23.
AMT 27 Test 27.
AMT 27 Test 2.
AMT 27 Test 4.
What is the purpose of megging a cable wire with the other end of the wire open?
To determine if the conductor is going to ground.
To determine if the conductor is continuous to the other end of the cable.
To tag the cable properly.
To determine if any conductors are grounded to any other conductors.
To determine if the conductor is open.
What would have to happen to cause the TRU II track circuit to reset.
A train made a move with a Stop and Proceed Signal displayed.
A train made a move with a Clear Signal displayed.
A train made an incomplete move through the interlocking.
A train made a complete move through the interlocking.
None of the above.
Which statement is CORRECT about the feed and relay end track transformers?
The feed end track transformer is set at a 10 to 1 ratio and the relay end track transformer is set at a 1 to 10 ratio.
The feed end track transformer is set at a 1 to 10 ratio and the relay end track transformer is set at a 10 to 1 ratio.
The feed end track transformer and the relay end track transformer are set at a 10 to 1 ratio.
The feed end track transformer and the relay end track transformer are set at a 1 to 10 ratio.
The feed end track transformer and the relay end track transformer are only transformer you adjust.
What condition(s) must exist for the VSR relay to energize?
A code-qualifying signal displayed.
The interlocking track circuit occupied
The track circuit outside of the interlocking must be occupied.
Answers "A" and "B" only.
Answers "A", "B" and "C" only.
How does a phase selective track circuit normally reset?
Steady energy causes the TR to pickup.
Steady energy causes the TR to pull normal and energize the TFPR.
Steady energy causes the TR to pull reverse and energize the TFPR.
Steady energy causes the TR to pull normal and energize the TBPR.
Steady energy causes the TR to pull reverse and energize the TBPR.
When a phase selective track circuit is occupied:
The TBPR is de-energized and the TFPR is energized.
The TBPR and the TFPR are de-energized.
The TBPR is energized and the TFPR is de-energized.
The TR is coding at the detection code rate
The TR is coding at the cab signal code rate.
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