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Comeng faults Flashcards

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1
Q

Train fails to power procedure

A
  1. Trip
  2. Switches - BVICS, door closed light, control, aux control and DC supply circuit breaker, motor isolation switch
  3. Gauges - main, control res and brake pipe
  4. Cocks - BVICS, red EC/TECHAV
  5. DC supply - supply light, LP flag lowered, bell works + AC supply saloon lights on
  6. Reverser
  7. Overload (traction equipment reset) while in direction
  8. Brake pipe reduction (hand pilot/cg test)
  9. Bypass C.G.
  10. Door loop bypass
  11. Second master controller

If still carked, train is disabled

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2
Q

Main res getting to 775 and safety valve blowing off

A
  1. Trip out lead compressor governor and monitor main res
  2. When changing ends, try tripping it in centre cabs to see if it stops rising to 775
  3. If get back to other end and the problem is fixed with the new lead compressor governor, just leave it instated and let compressors run continuously (otherwise train lined park brakes won’t release)
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3
Q

Main res rupture

A

Turn both MR end cocks on the two cars

Manually release spring park brake

Isolate local panto, VICERS, motors to all out

Kick passengers out of the problem car since doors will have no air to keep doors closed

Trip out EP and run on air brake

Release train lined park brakes

Trip compressor governor out

If lead motor is where ruptured main res is,

Close BVICS in lead motor, and competent employee open it in another motor

Since emergency brake only available in lead, max 15km/h

If in any other motor or trailer,

. ½ track speed to a maximum of 30km/h

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4
Q

When your train has failed to power and you have ensured your trip, switches, gauges and cocks are all okay, what is the next thing you need to check for?

A

DC Supply - bell and LP flag
AC supply - headlights and saloon light

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5
Q

If the DC supply light was extinguished what are some other ways to indicate that DC power is available

A

Bell
Low pressure flag lowered

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6
Q

What is the purpose of doing the brake pipe reduction during a ROBBDS test

A

Test if the control governor opens and closes, no dirt between contactors

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7
Q

What cock needs to be turned to introduce the secondary safety circuit

A

Red EC cock

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8
Q

What does a local fault light indicate to the driver

A

Indicates overload of an electrical nature

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9
Q

The control reservoir holds what amount of compressed air

A

490kpa

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10
Q

If there was a rupture in the control reservoir, what would be the effect on the motor carriage

A

No traction or rheo

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11
Q

If you had a control reservoir rupture, what fault light indicator should you have whilst powering

A

Line SW

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12
Q

If the traction motors on the lead driving motor weren’t operating, how would you isolate this

A

Motor iso cock and rheo switch
( 1&2 or 3&4 or all out)

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13
Q

If you needed to isolate just one pair of traction motors, what key is required to operate the traction motor cut out switch

A

Controller key

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14
Q

If an overload had tripped on the train, causing your motors to drop out, which button would you press to rest them

A

Traction overload reset

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15
Q

On a prep you found the main switch isolated, would they be able to reinstate this

A

No, contact fleet

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16
Q

What equipment runs off 1500vDC
(5 answers)

A

Pantos, MA’s, air compressors, traction equipment and associated circuits

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17
Q

What equipment runs on 415vac

A

Air con

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18
Q

What equipment runs on 240v AC

A

Saloon lights and headlights

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19
Q

What equipment runs on 110v AC

A

Control trip circuit

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20
Q

What power does the traction equipment run off

A

1500 v DC

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21
Q

After a loss of overhead, how many times does the overhead system attempt to reset itself

A

2 times

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22
Q

If the overhead power is lost , what will happen to the doors on the train

A

No doors

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23
Q

If overhead power has been unable to be restored, metrol will contact all drivers in the affected area and advise them to do what

A

Check mirrors to confirm that the LSM has lowered all trailing pantos
Press local MA EP stop valve
Press local panto EP stop valve

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24
Q

Once overhead has been restored, at what minute intervals will metrol instruct drivers to move

A

1 min intervals

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25
Q

What notch of power will a driver need to operate in once overhead has been restored

A

Series

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26
Q

Can a driver ever assume there has been a loss of overhead?

A

No,
Driver to inspect trip, switches, gauges and cocks

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27
Q

What item would a driver need to check to ensure AC power was available
(3 answers)

A

Normal saloon lighting
Van area cab light
Headlights

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28
Q

If overhead has been restored and there is no communication at what intervals can UP trains proceed

A

30 sec

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29
Q

If overhead has been restored and there is no communication at what intervals can DOWN trains proceed

A

60 sec

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30
Q

After a loss of overhead, how long will the emergency lights stay on for

A

2h

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31
Q

What indication would you get on your fault panel that the emergency lights needs to be reset?

A

The battery charger light will flash on the fault panel

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32
Q

What is the purpose of the LSM

A

Protect the overhead system from defective 1500 v DC train equipment from high demand after overhead start up

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33
Q

What is the speed threshold connected to the LSM

A

8 km

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34
Q

What voltage does the DC output need to drop below for 2 continuous seconds for the LSM to activate

A

95v

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35
Q

If the LSM has activated what brake will be available on the train

A

Over 8km
Air brakes

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36
Q

If the train is stationary in the yard and the LSM has activated as it has detected a loss of overhead. What equipment will be available on the train

A

No equipment will be operational on the train

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37
Q

If the train Is moving at approximately 90 kmh and the LSM has activated what would be the effect on the pantos

A

Pantos remains raised

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38
Q

If the train is stationary and the LSM has activated what will happen to the trains MA contactors if
1. BVICS open
2. BVICS closed

A
  1. Lead MA contactor ON, all others off (since trailing pantos will drop)
  2. All MA contactors OFF, all pantos down
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39
Q

When the power has been restored after a loss of overhead and Electrol have advised that, it’s due to a defective train. Metrol will contract drivers one by one and advise them to do what first

A

Request each driver to raise all Pantos and start MAs, when overhead is lost the defective train has been ID

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40
Q

When there has been a loss of overhead, after how many minutes with the VICERS activation valve activate

A

5mins
Without power VAV will open and exhaust BP

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41
Q

Will the traction overload reset button work to reset an MA that has oversped

A

No

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42
Q

How do you locally isolate a defective rheo brake

A

Rheo brake toggle switch

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43
Q

What does a steady aircon light indicate to the driver

A

One air con has failed on one or more carriages

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44
Q

What does a flashing aircon light indicate to the driver

A

Both air cons have failed on one or more carriages

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45
Q

What does a steady wheelslip light indicate to the driver if the train is stationary

A

Faulty wheel slip unit

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46
Q

What is the axel speed variation that will cause a wheelslip light to come on when the train is in motion

A

15km

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47
Q

What equipment is connected to the control C/B (5 answers)

A

Master controller & reverser
Traction equipment reset button
Remote panto lower and raise button
Rheo brake demand circuit
Train cable

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48
Q

If the control C/B tripped in the lead driving cab, what would be the effect on the train

A

Master controller inoperative and no train lined signals can be sent to the traction equipment
Speedometer will lose power

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49
Q

If the control C/B tripped when the remote panto raise button was pressed, what action would the driver need to do to raise their Pantos

A

Reset C/B
raise each panto locally
Submit TMM - faulty panto raise button

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50
Q

If the control C/B trips when the remote panto lower button is pressed and you are unable to locate the defective panto, can the train enter service

A

No

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51
Q

If the control C/b trips when the remote panto lower button is pressed, what must be done when the defective panto has been located

A

Reset the control circuit breaker
Electrically isolated EP valve with the switch
Press the remote panto lower button

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52
Q

If the control circuit breaker trip with the master controller closed (0 position), the reverser in OFF, the panto raise or lower button or traction equipment reset button Not being pressed and the brake controller handle is in the release position, where is the fault between

A

Short circuit between circuit breaker and master controller

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53
Q

What would be the effect if the control C/b tripped on the trailing motor

A

Flashing door close light

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54
Q

After 2 h of emergency lights being on how do you reset the lights

A

Turn Market switch

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55
Q

How do you isolate the rheo train lined

A

EP circuit breaker and run on air

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56
Q

You have taken a train from flinders street and upon arrival at Richmond you have noticed That all the compressors on the train are operating continuously, as time does not permit for Full fault finding procedures, what would you do to attempt to rectify this fault?

A

Isolate compressor governor electrically in the leading motor car

57
Q

What is the minimum amount of the traction motors required to keep a train in service

A

50%

58
Q

Is the 110vdc trainlined

A

Yes

59
Q

What equipment is connected to The auxiliary control C/b (7 answers)

A

Bell
Aux Start
Doors controls
Saloon lighting
Couple - Uncouple
Number 1 air con
Self centring

60
Q

How many MAs do you need operational to have full saloon lighting on a 6 car

A

All

61
Q

How many MAs do you need operational to supply the train with 110vDc power

A

1

62
Q

What power does the MA convert the 1500v DC down into

A

415vac

63
Q

What would be the effect if 1 MA failed on a 3 car consist (5 answers)

A

Half saloon lights
Half air cons
Half headlights
Lose console light
Lose rheo brake

64
Q

If all 4 DC circuit breakers trip and you are unable to reset any of them, what would be the effect on the train

A

Train disabled

65
Q

What is the main reservoir operating range

A

585-725kpa

66
Q

If you were unable to rectify compressors operating continuously on the train whilst in Running, what would be the effect on the train?

A

Safety valves would be blowing

67
Q

What would be the effect on the compressors train lined if one compressor governor had it’s contacts permanently close

A

All compressors will run continuously,
Until the safety valve will blow at 775kpa

68
Q

What equipment is connected to the Main reservoir system? (10)

A

• Door system
• Pantograph
• Motor alternator contractors
• Air suspension system
• Brake pipe charging
• Compressor Governor
• EP braking system
• Control res system
• SPB
• Whistle

69
Q

If you had a main reservoir pipe rupture on a leading motor what brake would be available To use?

A

Emergency brake

70
Q

The compressor governor c/b also powers what other button

A

The train-lined spring park brake buttons

71
Q

The compressor governor c/b also powers what other button

A

The spring park brake button

72
Q

What would be the effect on the train if you pneumatically isolate a compressor governor via the isolating cock

A

Governor contacts close and compressors will run continuously

73
Q

If you had a main reservoir tank rupture what cock would you need to isolate

A

Main res delivery cocks
Compressor governor c/b in cab
Turn off compressor contactor switch in cab also

74
Q

If you had a main res tank rupture why would you need to isolate the compressor governor on that motor car

A

To stop the compressor from continuously running

75
Q

If you had a deflated air suspension and were driving in a 50km area, what is the max speed you can travel at

A

25km

76
Q

What is the rule regarding speed with defective or deflated air suspension

A

Half- track speed to a max of 30km/h

77
Q

If you had a rupture in your control reservoir, why would it need to be isolated

A

All switches will remain open and there will be no traction power

78
Q

What equipment would need to be isolated if you had a control reservoir rupture

A

Iso control res IN cock
Motors to ALL OUT
Stops fault lights
TMM

79
Q

If you had a whistle operating continuously, what would be the first thing you would do to rectify the fault

A

Up and down on the lever several times
If no good, isolate cock in the driver’s foot well

80
Q

What speed restrictions apply when you have an inoperative whistle

A

Cautiously at reduced speed
15km max - stations, yards, around persons working near line

81
Q

Can a train remain in service with a low sounding whistle tone

A

Yes

82
Q

What is the first thing a driver should check when they notice a loss of brake pipe pressure

A

Check if the train has derailed

83
Q

What would be the cause of the brake pipe depletion if after placing the brake controller to the run and release position it recharges

A

Trip activated

84
Q

If there is a brake pipe rupture on car 1,2, or 3 can the train be driven from the lead motors

A

Drive from 4
CE in lead
Driver on air

85
Q

If the brake pipe has been ruptured on car nr 3, where must the competent employee sit

A

Lead motor

86
Q

What brake will be available in the lead if the brake pipe rupture is located under car Number 1?

A

Spring park brake

87
Q

If the brake pipe rupture is underneath car number 4, is a competent employee required to run the train in the original direction of travel?

A

No because we can use EP brakes to drive

88
Q

What brake is the driver required to use from the lead motor if the brake pipe rupt car number 5?

A

EP if no competent worker
Air if competent worker available

89
Q

What additional cock may be turned if there has been a rupture in the brake pipe Underneath cars 4 and 5?

A

Van Area cock if required (by competent employee in trailing motor)

90
Q

At what speed must a six car train be driven after a leak in the brake pipe between the brake pipe to brake Unit isolating cock and the triple valve of one carriage has been stopped?

A

15km/h

91
Q

what position is the brake controller handle if the charging valve closed ?

A

Emergency

92
Q

What is the max permissible speed required to run the train when it has a defect affecting continuity of the brake pipe

A

15km

93
Q

If the brake pipe fails to charge with the brake controller handle in run and release and the BVIC is open, which cock should the driver ensure is in the open position

A

Main res to brake handle

94
Q

If the driver is unable to rectify a charging valve defect, can the train be run without a competent employee

A

No

95
Q

If the charging valve defect where the driver can’t charge the brake pipe from the leading cab and a competent employee is available to charge the brake pipe from a different cab. What is the max speed the train can run at

A

15km

96
Q

What is the effect of a lockout magnet valve becomes defective in the close or energised position

A

Air brake will not engage in the event of overhead loss, so must drive to next station at 15km/h using EP/rheo then detrain and shunt.

ie. if overhead is lost, there will be no brakes except emergency

97
Q

What is the effect of a lock out magnet valve being defective in the open position

A

EP / rheo and air brake will all apply at the same time ( superbrake)
Fix: trip EP drive air only

98
Q

What controls the operation of the emergency application valve

A

Hand and foot pilot

99
Q

What are some potential causes of a FDCL? (6 answers)

A

• An open circuit in the train cable
• A marker light switch in the last motor cab being in the wrong position
• A coupler sensor being defective
• An Auxiliary circuit breaker in the last motor cab has tripped
• A Control circuit breaker has tripped in the last motor car.
• BVICS open in the last motor car

100
Q

If the emergency application valve is defective what can you do

A

Run on secondary safety apparatus

101
Q

If a flashing door close light cannot be rectified, what must be isolated for the train to regain traction power?

A

Door Loop Bypass

102
Q

How often does the control governor bypass button need to be pressed

A

30 sec

103
Q

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

A

Mechanical or obstruction

104
Q

What is the purpose of the release prevention valve

A

Prevents air brakes from releasing

105
Q

If all doors on one carriage become defective, what would be the most likely cause?

A

Door cocks could be isolated
Electrical circuit breakers above door number 3

106
Q

If all doors on the entire train become defective, which circuit breaker should be checked?

A

Auxiliary circuit breaker

107
Q

If the release prevention valve is defective, which brake should the train be run on

A

EP/ rheo

108
Q

How many MA’s need to be operational on a 6 car train to have FULL saloon lighting?

A

All 4

109
Q

Where is the saloon lighting circuit breaker located within the carriage?

A

Door 3

110
Q

What would be the likely cause if the saloon lighting was defective in a regular sequence?

A

A lighting circuit breaker has tripped or a switch it turned to the off position

111
Q

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

A

Charge BP, close BViC, if BP drops rapidly a BP leak is present.

If BP remains steady. Apply EMY brake, open BViC and charge BP. If BP charges to the same pressure as previous, regulating valve is defective

112
Q

If the brake pipe charges to between 425-550 kpa, can the train stay in service

A

Yes as normal

113
Q

What would be the likely cause of the saloon lighting was defective in a IRREGULAR sequence?

A

Inoperative tube

114
Q

If the brake pipe cannot charge above 425kpa due to regulating valve defect, can the train be operated without a competent employee

A

No will be disabled

115
Q

If the brake controller handle moved involuntarily to a lease position, what would be the safest way to operate the train

A

Trip EP c/b and use the air brake

116
Q

If the saloon lighting is inoperative throughout the entire train, and no emergency lighting is available, can the train remain in service?

A

Not During hours of darkness or in the MURL

117
Q

How long does the emergency lighting last for in the Comeng train before needing to be reset?

A

2 hours

118
Q

What component of the brake unit is used to assist to prevent sticking brakes

A

Release ensuring valve
Dump valve

119
Q

What indication would a driver have If sticking brakes (4 answers)

A

Retardation of the train
Smoke and odour
Observation of the brake cylinder gauge
Illuminated wheel slip fault light

120
Q

What are some methods of communication that can be used during training rescue?

A

Bell codes
Whistle codes
DTRS
Any other safe form of communication

121
Q

If the train had an electrical fault, can the disabled and rescuing train be coupled up electrically?

A

No

122
Q

What must be done when 2 trains have been coupled up to perform a train rescue?

A

Continuity

123
Q

What is the first step a driver must do when encountering sticking brakes during running

A

Have to feel the train. Lack of power, not rolling freely or wheel slip light

124
Q

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

A

The driver of the assisting train will:
• Remain in the attached cab
• Ensure the Train-lined Park brake is applied
• Isolate the VICERS key switch
• Isolate the Door Loop Bypass key switch
• Raise the Trip
• Apply and isolate the Automatic Air Brake
• Turn the Red EC cock
• Set the Foot Pilot Valve
• Press the Control Governor Bypass button as required

125
Q

What 2 key switches must also be isolated on the Comeng train when performed a train rescue?

A

VICERS
Door loop bypass

126
Q

If the trains have been coupled non electrically during a train rescue, what brake would be used to operate the 2 Comeng trains through the section?

A

Air brake

127
Q

When encountering sticking brakes, with the train being stationary, what procedure do you follow

A

Check air pressure
Step 7 and to release
Apply min power
Let train roll to check
Stop at suitable location

128
Q

If a driver has had to isolate 2 bogies on a 6 car train, and track speed for the area was 95km what is the max speed you can operate

A

85km

129
Q

If a driver has had 4 bogies isolated on a 6 car train and track speed for the area was 80 km what is the max speed

A

Extreme caution

130
Q

If the train has had more than 50% of it’s bogies isolated, how can the train be operated

A

Disabled. Needs to be rescued

131
Q

What is the max permissible speed a train can be run at with locked axel/ skidding wheel on a trailing car

A

5km

132
Q

What is the maximum permissible speed a train can be run at with locked axel/skidding wheel on the lead bogie

A

Disabled

133
Q

After. A train with skidding wheels has cleared the section, what speed can the following trains proceed over the track until it has been certified

A

15km

134
Q

If the brake block has passed the 10mm line, is the brake block still serviceable

A

Yes but needs to be reported as worn

135
Q

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

A

Brake block is unserviceable and bogie needs to be isolated

136
Q

What are the piston travel settings for a comeng train

A

30 to 65mm

137
Q

After a bogie has been isolated, what additional requirements must a driver do after booking the fault with TC

A

Fault warning notice must be filled out
Fault warning stickers must be placed at both ends

138
Q

What is the general speed rule with bogies isolated

A

Below 60km no speed reduction. Track speed over 60km must be reduced by 10km

139
Q

If the control circuit breaker trips with the master controller closed ( O position), reverser in FORWARD, NEUTRAL or REVERSE, the brake controller handle in the applied position (1-7), The EP circuit breaker is set and the Rheo brake isolate switch in the NORMAL position, what is the most likely cause of the fault?

A

Short circuit between circuit breaker and master controller
A short circuit on the electric brake demand wire in the train cable
A fault in the rheostatic brake control equipment on any motor car in the train.

Train Driving (91 decks)

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