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MT Trainee > Faults Comeng - Revision > Flashcards

Faults Comeng - Revision Flashcards

1
Q

When rescuing a train and you’re pulling it out of section and it has no pantos up, what cock do you need to turn?

A

Techav (to remove trip)

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2
Q

???? Saloon lights - running emergency

A

Yes

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3
Q

Trips switches guages cocks, what’s next?

A

DC supply light

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4
Q

Hiw can you tell you have no DC supply

A

No bell
LP flag raised

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5
Q

What is the control res pressure

A

490kpa

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6
Q

Effect on train if you have control res rupture

A

Line breakers fail to close

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7
Q

If a control res has ruptured, what fault lights will you get?

A

Line switch

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8
Q

If you have a control res rupture how do you isolate motors?

A

Motors all out

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9
Q

What can you press in the cab if you have traction issues

A

Traction overload

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10
Q

Do we touch the main switch?

A

No

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11
Q

What 3 things are supplied by the 1500v DC

A

MA, compressors, traction motors

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12
Q

How many times does substation restart during overhead loss?

A

2x

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13
Q

During overhead loss what happens to doors?

A

Release

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14
Q

Overhead loss - what will all trains in section be asked to do?

A

Lower pantos

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15
Q

Overhead loss, with comms, at what time intervals will trains depart once overhead has been restored

A

One minute intervals

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16
Q

During overhead loss and trains begin to clear the section again, what notch of power should they use?

A

Series

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17
Q

AC power items (3)

A

Non-emergency saloon lights (normal lighting)
Van area cab light
Operation of headlights

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18
Q

Overhead loss and no comms, at which time of the clock will UP trains and DOWN trains move?

A

⬆️ 30 seconds
↕️ 60 seconds

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19
Q

Overhead loss, how long will battery backup last?

A

2 hours

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20
Q

Wheb overhead power is lost, what fault light will flash on drivers fault panel?

A

Battery charger (to indicate a reset of the emergency lighting is required)

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21
Q

What does the LSM do?

A

Protects the sub station from the train

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22
Q

LSM speed threshold for time delay?

A

8km

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23
Q

Overhead loss, LSM activates when the output of MA’S drops below what voltage?

A

95vDC for 2 continuous seconds

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24
Q

During overhead loss what two things are still available?

A

Emergency lighting
PA systrm

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25
Q

LSM operation - train moving over 8km/h, BVICS open overhead lost, timers WITHIN 4 minutes - what does LSM do to train?

A

Lowers all trailing pantos
Shuts down local MA
Trips EP CB

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26
Q

Overhead loss - to locate defective train, Train Control will request drivers to do what?

A

Raise each panto individually
Start each MA locally

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27
Q

Overhead loss - how many minutes until vicers times out?

A

5 minutes

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28
Q

Will traction overload button work if MAs have oversped

A

No

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29
Q

How to isolate rheo brakes?

A

Toggle switch

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30
Q

What does a steady air con light indicate

A

1 AC in 1 car down

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31
Q

What does a flashing aircon light indicate

A

More than 1 AC in 1 car down

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32
Q

Where is the fault if the wheel slip fault light illuminates while stationary?

A

Wheel slip unit

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33
Q

Wheel slip axle km difference

A

15km

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34
Q

What is part of the control CB

A

MRBOPC
Master controller
Reserver
Rheo brake
Traction overload
Panto raise and lower
Control govener

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35
Q

What happens to train if control CB trips?

A

Fail to power

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36
Q

If you’re leading panto fails to raise, how will you get your pantos up?

A

Raise individually

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37
Q

If your pantos won’t lower what happens to train?

A

Out of service

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38
Q

If control cb trips in trailing cab, what indication will you get in lead?

A

FDCL

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39
Q

???? Scenario based question about locating control CB trip cause

A

Reverser is the cause

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40
Q

???? Scenario based question about locating control CB trip cause

A

Rheo demand wire is the cause

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41
Q

How to isolate rheo train lined?

A

Flip EP CB

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42
Q

???? What is the lowest % of traction motors (isolated bogies?) can you continue driving with

A

50%

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43
Q

???? (Forget how the question was worded)
Is 110v train lined?

A

Yes

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44
Q

How many MA’S need to be running for full saloon lighting?

A

All

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45
Q

1 MA running effect on train

A

Half saloon lighting each car
Half AC each car
Local rheo brake will be inoperative

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46
Q

Effect on train if no DC supply

A

Disabeld

47
Q

Effect on MA If compressor governers fail in closed position

A

Run continuously

48
Q

Effect on compressor governor if compressor governor cb tripped?

A

Isolates local compressor govoner

49
Q

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

A

Compressor runs continuously

50
Q

Compressor running continuously what CB can we check and isolate?

A

Check and isolate local compressor govoner

51
Q

Auxiliary circuit breaker components

A

BADSCARS
Bell
Auxiliary start
Doors release and close
Saloon lights on and off
Couple and uncouple
Aircon #1 control
Local rheo brake
Shcfenberg self centring

52
Q

What connects to MR air

A

Picture

53
Q

brakes available if MR ruptured in lead?

A

Emergency

54
Q

MR ruptured in motor car, what do you need to do / isolate

A

Local Panto electrically and pneumatically
Comp gov
Motors all out
Mr end cocks
Release SPB

55
Q

Mr rupture in trailer car, what have you lost/what needs to be isolated

A

Doors
Air suspension
End cocks

56
Q

MR rupture in lead, do you need a competent employee?

A

Yes

57
Q

brakes available if MR ruptured in lead centre

A

Air brake

58
Q

What cocks to turn if MR tank ruptured?

A

MR delivery
Isolate compressor govener

59
Q

If isolated air suspension and you’re in a 50 track speed zone what speed do you need to do?

A

25km
( restriction = max 30 or half track speed)

60
Q

Effect on train if control res ruptures

A

Insufficient air to close line breakers

61
Q

Leak in control res effect on train

A

line breakers cannot close

62
Q

In addition to isolating control res cocks during a leak, what else must be isolated?

A

Motors all out

63
Q

Whistle defect

A

Depress multiple times

64
Q

If BP rupture, first thing we check

A

Derailed

65
Q

If you see a sudden decrease in BP pressure, and you put controller to emergency then back to run and release and BP charges…what has happened?

A

Back tripped - trailing trip gear activated

66
Q

BP rupture in cars 1,2 or 3 (on 6 car) can you drive from lead?

A

???? No lead driving

67
Q

BP rupture car 3 - where would comp emp sit?

A

Lead

68
Q

BP rupture in lead car 1 - during rescue what brakes do you have in the lead?

A

Spring Park brake

69
Q

BP car 4 - do you need comp emp?

A

Do not need a competent employee

70
Q

BP rupture car 5 and no competent employee, what brakes do you have?

A

EP

71
Q

BP rupture in car 4 or 5 and no comp emp, what can you isolate on brake unit?

A

MR -> 7 step relay

72
Q

BP leak in brake unit branch pipe between brake unit iso and trip valve iso speed restriction

A

10km less if above 60km (treat it as an isolated bogie)

73
Q

Charging valve is closed in what position?

A

Emergency

74
Q

???? Defect BP speed

A

15km

75
Q

BP is failing to charge when in Run and release and bvic open - what can we check?

A

MR to Brake controller

76
Q

Unable to free jammed charging valve do we need a competent employee?

A

Yes

77
Q

Speed if charging valve not charging in lead ????

A

15km ????

78
Q

Lockout magnet valve faulty in deenergise (open) positon brakes

A

Super brake - air ep and rheo working simultaneously

79
Q

What to do if lockout magnet valve defective in closed (energised)

A

Place Brake controller into emergency
Run EP/Rheo
Restricted to 15km

80
Q

Lock out magnet valve brakes when faulty in energised (closed) position

A

No brakes

81
Q

What is connected to the emergency application valve

A

Hand and foot pilot valves

82
Q

If defective EAV how must train be run?

A

Secondary circuit

83
Q

Control gov bypass timer

A

30 seconds

84
Q

Purpose of release prevention valve

A

Prevents release of auto air

85
Q

What do we run on if release prevention valve not working

A

EP and rheo

86
Q

How to ascertain BP not charging correctly due to regulating valve defect or BP leak?

A

Close bvic
If BP drops then BP leak
If doesn’t drop then -
EMY
Open BVIC
Release brake
If it only charges back to previously low pressue then its regulating valve at wrong number

87
Q

If BP is charging between 425kpa and 550kpa, what brake will we run on?

A

Ep and rheo and monitor BP

88
Q

If BP not charging above 425, what will we need

A

A comp emp to charge BP from trailing motor

89
Q

If brake handle releasing towards release positin what brake do we run on?

A

Air brake

90
Q

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

A

Dump valve

91
Q

How will we know if we have sticking brakes

A

Wheel slip fault light
Retardation of brakes
Smoke/smell

92
Q

LSM operation - all BVICS closed, speed is zero and timers have been reset (over 4 minutes) - What happens to pantos and MA’S?

A

All pantos will lower
MA contacts will set to OFF

93
Q

MR operating pressure

A

585-725

94
Q

If MR tank ruptured why would you isolate the compressor governor?

A

To stop compressor running continuously

95
Q

Train rescue - disabled train has electrical fault, will you couple up electrically?

A

No

96
Q

Train rescue - when pushing disabled train out of section what will I need to do in my cab?

A

Red ec cock
Raise trip
Control gov bypass
Set foot pilot valve
Door loop bypass
Isolate vicers

97
Q

If coupling non electrically, what brake have you got?

A

Air

98
Q

Saloon lights CB is located where?

A

Above door 3 in the saloon

99
Q

Saloon light failure in regular sequence cause?

A

Circuit breaker has tripped

100
Q

Saloon light failure in irregular sequence?

A

Tube is faulty/blown

101
Q

If there is a saloon light failure, no emergency saloon lighting and its daylight, can you still run train?

A

Yes

102
Q

Reasons for FDCL

A

Doors
Control CB tripped
BVIC

103
Q

If FDCL not rectified, what do you do?

A

Door loop bypass

104
Q

If 1 door is faulty is it likely caused by pneumatic, mechanical or electrical fault?

A

Mechanical

105
Q

If all doors In 1 carriage faulty what is cause?

A

Pneumatic issue

106
Q

If all doors on entire train faulty what is cause?

A

Auxiliary CB

107
Q

If you have sticking brakes in running, what do you do?

A

Trip EP CB
Make full service brake application

108
Q

If sticking brake while stationary what do you do?

A

-Step 7 -> run and release multiple times (to flush out obstructing)
-Release brake and go for power
-If train rolls freely, can go back in service

109
Q

Brake blocks - have deteriorated just past the 10mm line, is it still serviceable?

A

Yes

110
Q

If metal backing on break is touching brake what do we do?

A

Isolate bogie

111
Q

Piston travel mm’s

A

30 - 65mm

112
Q

If no continuous BP what is speed restriction?

A

15km

113
Q

Brake handle defective in release position, what brake do we run on?

A

EP/Rheo

MT Trainee (41 decks)

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