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Kayla Sewell > Comeng Faults > Flashcards

Comeng Faults Flashcards

1
Q

If the dc light is extinguished and you’ve proven that it is not working by pressing the test button. What are two ways you can prove you have dc supply?

A

Bell
Lp flag hasn’t raised

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2
Q

Why do we do a brake pipe reduction test apart of the robbds test?

A

To ascertain if the control governor is causing the train to fail to power.
Fault may have been dirt caught inbetween the control governor contacts

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3
Q

What does the local light mean?

A

Overload in the traction equipment

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4
Q

Can an overload reset fix an over speed in the ma?

A

No

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5
Q

What fault light would you get if you had a control res rupture?

A

Line switch

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6
Q

Your local, line switch and this car fault light have appeared. While in running and you apply the brake you also get a rheo fault light.
How do you get rid of the fault lights

A

Motors to all out
Rheo toggle switch to isolate

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7
Q

The main isolation switch has been isolated, you’ve found it in a prep in the isolation position, can you put it back?

A

No you can’t touch

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8
Q

What equipment runs on 1500vdc?

A

Motors
Motor alternator
Air compressors

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9
Q

If you’ve got no comms, and power had been restored, at what intervals will an up train move?

A

30 second mark on a clock

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10
Q

If you’ve got no comms, and power had been restored, at what intervals will an down train move?

A

60 second mark

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11
Q

How do you power to the next section after power has been restored?

A

Series

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12
Q

Can you ever assume that the over head is out?

A

No

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13
Q

How long will the batteries last on a comeng?

A

2 hours

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14
Q

What does the lsm do?

A

Protects the substation from faulty equipment on your train

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15
Q

What does the dc output on your train cable need to fall to for the lsm to actually work?

A

95vdc for 2 continuous seconds

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16
Q

After the lsm has activated and all your pantos have dropped. What two things will you still have available to use?

A

Pa and emy lighting

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17
Q

Your train is moving at approx 110km/h, the lsm has activated what will be the affect of your pantos?

A

Nothing the will remain up as you are travelling too fast.

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18
Q

The train is stationary, your lead bivics is open. The lsm has activated, what will happen to the train after 4 mins?

A

All pantos will drop
Ma contactors will remain open

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19
Q

The train is stationary, your lead bivics is open. The lsm has activated, what will happen to the train before 4 mins is up?

A

All pantos except lead will drop
Lead will remain on the wire
Lead ma contactor will remain closed rest will open

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20
Q

If we have a loss of overhead after how many minutes will the vicers time out?

A

5 mins

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21
Q

When your stationary and your wheel slip light illuminates, what does that indicate?

A

Fault in the wheel slip unit

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22
Q

What is the axle speed variation in order for wheel slip light to illuminate?

A

15km/h

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23
Q

If the disabled train has an electrical fault can the rescuing and disabled train be coupled electrically?

A

No

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24
Q

If a comeng is pushing a disabled train out of the section, how must the cab of the assisting train be set up?

A

Turn the Red ec cock
Raise our trip
Set the foot
Press c.g bypass

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25
Q

What key switches must be isolated when performing a rescue?

A

Door loop and vicers

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26
Q

If the trains have been coupled non electrically what brake would you use?

A

Auto air

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27
Q

Where is the saloon lighting circuit breaker within the carriage?

A

Door 3

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28
Q

What would be the likely cause if we had a regular sequence of lighting out?

A

Circuit breaker has tripped

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29
Q

What would be the likely cause if we had a irregular sequence of lighting out?

A

The tube is out

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30
Q

If saloon lighting is inoperative throughout the entire train and no emy lighting is available. Is the train able to remain in service?

A

Yes but only in hours of daylight.
Cannot enter murl or wrt

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31
Q

What are some potential causes of fdcl?

A

Defective door
Tripped control circuit breaker
Bvic open in a trailing motor

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32
Q

If fdcl cannot be rectified what must be isolated to get traction?

A

Door loop bypass

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33
Q

If only one door is defective on the train, what is the likely cause?

A

Mechanical

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34
Q

If all doors on a carriage are defective, what is the cause?

A

Pneumatic

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35
Q

If all doors on an entire train are defective which circuit breaker is the cause?

A

Auxiliary circuit breaker

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36
Q

What component of the brake unit is used to assist in preventing sticking brakes?

A

Dump valve

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37
Q

What indication would a driver have of sticking brakes?

A

Wheel slip light
Smoke
Retardation

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38
Q

First step when you have sticking brakes in running what do we do?

A

Trip ep circuit breaker and full service application of the air

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39
Q

When encountering sticking brakes while stationary, what are the correct procedures to follow?

A

Perform a rapid succession of the ep brake from release to step 7 to release
Apply minimum power to see if the train moves freely

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40
Q

If a brake block has passed the 10mm line is the brake blocks till serviceable?

A

Yes (still got more left/hasn’t passed the line elsewhere)

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41
Q

If the metal backing of the brake block is making contact with the wheel what must a driver do?

A

Isolate and book

42
Q

What position of the brake controller handle is the charging valve closed in?

A

Emy

43
Q

What is the maximum permissible speed when the train has a defect affecting the continuity of the brake pipe?

A

15km/h

44
Q

If you open your bvic and it fails to charge what cock are you checking?

A

Mr to brake controller

45
Q

If a driver is unable to rectify a charging defect can a train be run without a c/e?

A

No

46
Q

If there is a charge valve defect where the driver cannot charge the brake pipe from the leading cab and a competent worker is available to charge from an intermediate location what is the maximum permissible speed?

A

15km/h

47
Q

How should a driver react if the lock out magnet valve becomes defective in the closed or energised position?

A

Check if the emy brakes work
Run it at a speed of 15km/h

48
Q

How should a driver react if the lock out magnet valve becomes defective in the open or de-energised position?

A

Ep and rheo will work simultaneously

49
Q

What components operate the application of the emergency valve?

A

Hand and foot pilot valve

50
Q

If there was a defective operation of the emergency valve how would we run the train?

A

On secondary circuit (turn red ec)
Set the foot pilot valve
Press c.g bypass every 30 secs

51
Q

What’s the purpose of the release prevention valve?

A

Prevents the release of your brake

52
Q

If we had a defective release prevention valve, how would we run the train?

A

Ep/rheo brake

53
Q

How would a driver ascertain if the brake pipe isn’t charging correctly due to a regulating valve defect or brake pipe leak?

A

Close bvic
If brake pipe pressure drops its brake pipe leak
If it stays the same then it’s the regulating valve set at wrong number

54
Q

If the brake pipe charges between 425-550 how would we operate the train?

A

ep/rheo and monitor

55
Q

If the brake pipe can’t be charged above 425kpa and can’t be run without a c/e what happens to the train?

A

Disabled

56
Q

If the brake controller moved to the release position involuntarily, how would we run the train?

A

Run on auto air and submit tmm

57
Q

If we’ve noticed a loss of brake pipe what is the first thing we check?

A

Derailed

58
Q

After we’ve noticed a brake pipe depletion, put it into emy and back to run and release, what does that mean has happened?

A

A trailing trip has activated

59
Q

On a 6 car train, if there is a brake pipe rupture on cars 1,2 or 3 can the train be driven from the lead motor?

A

No

60
Q

If a brake pipe rupture has occurred on car 3 of a 6 car where would the c/e sit?

A

In the lead and we sit in the middle

61
Q

Now when being rescued what brake would be available in the lead motor if the brake pipe rupture is located under car one?

A

Spring park brake

62
Q

On a 6 car train if the brake pipe rupture is under neath car 4, is the c/e required to run the train in the original direction of travel?

A

No
Your driving it from the lead
(Longest portion of brake pipe)

63
Q

On a 6 car train if the brake pipe rupture it’s under neath car 4, what brake will you run on?

A

Ep and rheo

64
Q

On a 6 car train if the brake pipe rupture it’s under neath car 4, what other cock will we turn so the brakes don’t come on on that car?

A

Mr to 7 step

65
Q

If we had a brake pipe leak and it is located on the branch pipe between the isolating cock and the triple valve of one car, at what speed must the train be driven in once it is isolated?

A

10km/h less than track speed for speeds above 60km/h
Track speed for below 60km/h

66
Q

Main res operating range?

A

585-725kpa

67
Q

If one compressor governor had its contacts closed permanently what happens to the compressor?

A

Runs continuously

68
Q

What’s the purpose of the compressor governor circuit breaker?

A

It will isolate the local compressor from the rest of the compressors that are train lined

69
Q

What would be the affect on the train if you pneumatically isolated a compressor governor by its isolating cock?

A

Run continuously

70
Q

You’ve taken a train from flinders, upon arriving at Richmond you’ve noticed all the compressors are running continuously, you don’t have time for rectification what do you do?

A

Isolate yours and see if that fixes it

71
Q

What equipment is connected to the main res system?

A

Pantos
Air suspension
Spring park brakes
Doors
Control res
Compressor gov.

72
Q

If you had a main res rupture in the lead motor what brake would you have available to use?

A

Emy only

73
Q

What would you need to isolate if you had a main res rupture on any motor car other than the leading?

A

Pantos
Compressor gov.
Motors all out
Main res end cocks
Manually release spring park brakes

74
Q

If you had a main res rupture on a trailer car what equipment would be lost?

A

Doors
Air suspension

75
Q

If you had a main res rupture in the lead motor could the train be moved from the section without the presence of a c/e?

A

No

76
Q

What brake would the driver be required to use if there was a main res rupture on the leading centre?

A

Air brake

77
Q

What speed restrictions apply to a train with a main res rupture on a t car?

A

1/2 track speed to a max of 30km/h

78
Q

If you had main res rupture what cocks would you need to isolate?

A

Main res delivery

79
Q

If you had main res rupture why would you need to isolate the compressor gov on that motor car?

A

To stop the compressor from running continuously

80
Q

If we had deflated air suspension and driving in a 50km/h section what is max speed you can travel at?

A

25km/h

81
Q

What would be the affect of the train if there was a rupture in the control res tank?

A

Insufficient air pressure to close the Line breakers

82
Q

What would need to be isolated on that motor car with a control res rupture?

A

Motors all out

83
Q

If you had a whistle operating continuously what would be the first thing you would do?

A

Depress the lever (slap it)

84
Q

What will a driver check to see if we have ac power available?

A

Non Emy saloon lights
Van area light

85
Q

What fault light will be present if emy lighting needs to be reset?

A

Battery charger flashing

86
Q

What’s the speed threshold connected to the lsm?

A

8km/h

87
Q

If the lsm has been activated what brake will be available?

A

Auto air

88
Q

If main res and brake pipe pressure simultaneously fall. How do we ascertain if it’s brake pipe or main res failure?

A

Charge brake pipe
Immediately close the bvics
If main res falls then its main res
If brake pipe falls and main res remains steady then its brake pipe

89
Q

If your control circuit breaker tripped in the third car what would be the affect on the train?

A

Nothing

90
Q

If you press your train lined panto and your control circuit breaker trips what will you have to do?

A

Locally raise your pantos and re instate the switch

91
Q

If you are doing a prep and press pantos down and control circuit breaker trips can the train remain in service?

A

No

92
Q

If you press panto down in running and control circuit breaker trips, what do we do?

A

Locally lower and isolate panto
Lower train lines pantos if that works run how it is

93
Q

Control circuit breaker trips with the mc in the closed position (coast),
Reverser off, panto lower or traction equip button hasn’t been pressed, brake handle is in released position. What is the fault

A

Mc and reverser to the circuit breaker

94
Q

Mc is closed, reverser is in fwd, neutral or reverse, brake handle is applied, ep circuit breaker is set, rheostatic brake toggle switch is in the normal position. What is the fault?

A

Rheostatic brake

95
Q

How do you isolate the rheo brake across the whole train?

A

Flip out ep and run on air

96
Q

What is the minimum amount of traction motors needed to have to keep the train in service?

A

50%

97
Q

Is the 110vdc train lined?

A

Yes

98
Q

What equipment is connected to aux circuit breaker?

A

Bell
Aux start
Doors
Saloon lighting
Couple/uncouple
Aircon
Rheo
Self centring device

99
Q

How many ma’s will you need to have to have full saloon lighting?

A

All

100
Q

How many ma’s will you need to have 110vdc?

A

1

101
Q

What voltage does an ma produce?

A

415vac

102
Q

How many dc siupply circuit breakers do I need to run a train ?

A

1

Kayla Sewell (27 decks)

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