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Metro Traineeship > Comeng Faults EMU test (119 of 155 from EMU quiz) > Flashcards

Comeng Faults EMU test (119 of 155 from EMU quiz) Flashcards

1
Q

True or false:
Isolation of the rheostatic brake to determine a cause of breaking faults can only be done on a car-by-car basis.

A

True

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1
Q

By what method can the rheo brake be isolated on the entire train?

A

Tripping the EP circuit breaker

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2
Q

If there is a fault in the train cable between the first and second cars which affects the A, B and C wires from the brake controller, what will be effect be on the train?

A

EP breaking will not operate on all of the trailing cars

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3
Q

If EP brake operates in step one and two, but fails to operate in step 3, what is the likely cause?

A

Failure of the B wire from the brake controller

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4
Q

If the EP or rheo brake is erratic in its performance, what steps must a driver take? (3)

A
  • Trip EP circuit breaker
  • Run train on Auto Air Brake
  • Submit TMM
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5
Q

How will a second BVICS open present itself in the lead cab?

A

The blue Doors Open light will flash continuously

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6
Q

If brakes are sticking on a trailing car, what indication will a driver receive in the lead cab?

A

Wheelslip light may or may not illuminate

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7
Q

True or false:
Main res pressure will not be monitored whilst the EP circuit breaker is tripped and low pressure flag is raised.

A

True

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8
Q

What is the maximum allowed speed of a train that is running with deflated air suspension?

A

50% of track speed to a maximum of 30km/h

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9
Q

What should a driver do if the brake controller handle is moving to a more released position without driver input? (4)

A
  • Cut out EP circuit breaker
  • Run on air brake
  • Isolate local rheo brake
  • Submit TMM
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10
Q

What does a steady air con fault light indicate?

A

No more than one HVAC has failed on each trailing motor or trailer car

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11
Q

What does a flashing air con fault light indicate?

A

Both HVAC units have failed on one or more car

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12
Q

If a driver observes flashing Air Con fault light but all HVACS appear to be operating, what else can the driver check?

A

Air Con alarm circuit breaker above No. 3 door in all cars

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13
Q

A Wheelslip fault light illuminated whilst the train is in motion indicates what approximate difference of speed between the axles?

A

15km/h

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14
Q

What does an illuminated wheelslip light indicate when a train is stationary?

A

A fault in the wheelslip unit and its associated equipment

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15
Q

The control circuit on a Comeng train supplies current for which equipment? (8)

A
  • Master controller
  • Reverser
  • Remote panto raise
  • Remote panto lower
  • Traction equipment reset
  • Electric demand circuit breaker
  • Speedo
  • Control gov
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16
Q

If a train is failing to power and still not powering after testing a second master controller, what is the next step in the fault finding procedure?

A

Declare the train disabled

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17
Q

What is the correct procedure if marker lights and headlights fail during darkness and it is not possible to reverse units to eliminate the faults?

A

Train must be removed from service at first opportunity

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18
Q

If normal brake pipe pressure can’t be maintained, how could a driver ascertain the cause of the fault?

A

By closing the Brake Valve Isolating Cock. If brake pipe pressure remains steady the regulating valve is defective. If it falls rapidly, the brake pipe is leaking

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19
Q

How many turns are required to manually apply spring park brakes on a tread-brake Comeng after it has been manually released?

A

40-60

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20
Q

What must the driver of a comeng do if the brake pipe hose bursts between the centre motors and no competent employee is available?

A
  • Close the brake pipe cocks between centre motors
  • open BVICS of rear portion of the train
  • run on EP brake
  • Isolate VICERS in trailing centre motor
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21
Q

If train has failed and trip, switches, gauges and cocks have been checked, what is a driver’s next step in fault finding?

A

See if the train will power in reverse

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22
Q

How many anti-clockwise turns are required to manually release the spring park brake on a Comeng disc break train?

A

It cannot be manually released

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23
Q

What is the effect of a Lock-Out Magnet Valve being defective in the closed or energised position?

A

the Auto Air break will only operate in Emergency

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24
Q

If the compressors run continuously, after the Compressor Governor Circuit Breaker has been isolated, what is the driver’s next action?

A

Restore circuit breaker to normal position, then isoalte the compressor governor circuit breaker on next motor

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25
Q

If there was a fault somewhere on the rheo demand circuit of a Comeng, which circuit breaker would trip?

A

Control Circuit Breaker

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26
Q

Consider the following scenario on a Comeng train:

a) Master Controller is closed
b) Reverser is in FWD, neutral or reverse
c) Brake controller is in applied position
d) EP circuit breaker is set

If the control circuit breaker will not remain set, what is the likely cause of fault?

A

Short circuit in the rheo brake demand wire of train cable or local rheo brake controller cable on any M car

(the lack of commas make this difficult to comprehend but I copied it straight from the EMU and don’t get the concept so I can’t clarify)

(cut out local rheo and see if that’s the issue)

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27
Q

If Auto Air brake becomes inoperative on lead car and no competent employee is available, what must be done?

A

Declare the train disabled

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28
Q

True or false:
The rheo brake will operate normally when the EP brake is isolated

A

False

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29
Q

At 80km/h whilst in step 7 of rheo breaking, what amperage should a driver observe?

A

200 amps

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30
Q

At 80km/h, in step 7 of theo braking, at what amperage would a driver book a “low amps rheo breaking” fault?

What would a driver then need to do?

A

160 amps or fewer.

Driver needs to book fault and isolate rheo in lead motor

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31
Q

With maximum EP brake pressure in step 7, what extra braking force is provided if the handle is moved to emergency?

A

10%

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32
Q

What valve provides for the extra braking force when moving from step 7 EP breaking to Emergency?

A

Restricted Application Limiting Valve & Ball Check Valve

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33
Q

What does a raised “low pressure” flag indicate to a driver? (2)

A
  • Pressure in main res is below a safe level (500kPa)
  • EP brake is inoperative due to failure or isolation of power supply
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34
Q

True or false:
The LP flag will be vertical if the EP main res isolating cock has been isolated

A

True

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35
Q

If an EP fault occurs, does the “low pressure” flag continue to monitor main res pressure?

A

No

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36
Q

What is the function of the Panto Isolating Switch in the driver’s cab?

A

Electrically isolates the pantograph EP valve on that car, preventing it from being raised

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37
Q

If the local panto isolate switch is in the isolate position in the rear cab, and a driver attempts to raise all pantos remotely from the lead car, what will happen to the rear cab panto?

A

It won’t raise, as panto raise motor has been isoalted

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38
Q

If 1500v overhead supply is weak, Metrol may instruct drivers in affected area to leave how many MAs operating?

A

One

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39
Q

When the rheo brake isolating switch in the driver’s cab has been placed to isolate, what will be the effect on the train?

A

Isolates rheo brake in that motor car only

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40
Q

The Aux isolating switch in the driver’s cab performs what function?

A

Isoaltes Aux EP valve on that motor car only

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41
Q

If Aux Isolating Switch in trailing cab was in Isolate position, and a driver pressed Aux Start in leading cab, what would occur?

A

MA on trailing motor would not start as MA start valve has been electrically isolated

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42
Q

The LSM performs which functions when the train is running? (4)

A
  • Detect reduction of DC voltage
  • Stop remote MAs
  • Lower remote pantos if train under 8km/h
  • Trips EP circuit breaker to run air brake if total loss of power
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43
Q

If a comeng is stationary with pantos raised, what functions does the LSM provide?

A
  • Detect reduction of DC voltage
  • Stop ALL MAs
  • Lower remote pantos
  • Trips out EP circuit breaker if total loss of power
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44
Q

When preparing train for service and pantos will not remain raised, what can a driver isolate to ascertain if that equipment is causing the fault?

A

LSM power switch

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45
Q

When preparing train for service and MAs will not start, what can a driver isolate to ascertain if that equipment is causing the fault?

A

LSM power switch

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46
Q

When preparing a comeng for service and the EP circuit breaker trips continuously, what can a driver isolate to ascertain if that equipment is causing the fault?

A

LSM power switch

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47
Q

What function does the horn isolate cock serve?

A

Isolates main res air to the train horn on that motor car only

48
Q

What function does the Uncouple Isolate Cock serve?

A

Isolates flow of main res air to pneumatic uncouple buttons

49
Q

What function does the Panto EP Isolating Cock serve? (2)

A

Isoaltes flow of main res air to the local Panto EP Raise valve

AND

Allows air within the panto line to pass to atmosphere causing the panto on that motor car to lower

50
Q

What function does the Motor Alternator EP Isolating cock serve? (2)

A

Isolates flow of main res air to the local motor alternator EP valve

AND

Prevents motor alternator from starting via the auxiliary start button from any other motor car

51
Q

What function does the Trip Gear Isolating Cock serve? (2)

A
  • Isolates flow of control res air to the trip latching lever, rendering it ineffective
  • When isolated, trip will lower irrespective of the position of the trip latching lever
52
Q

What function does the brake pipe sensor isolating cock serve?

A

Isolates flow of brake pipe air to the Scharfenberg uncoupling governor allowing uncoupling to occur regardless of brake pipe pressure

53
Q

What does the Panto & MA Isolating cock serve? (2)

A

Isolates flow of main res air to local Panto Raise EP valve

AND

Isolates flow of main res air to local Motor Alternator Start EP valve

54
Q

What function does the Low Pressure Flag Isolating Cock serve? (2)

A

Isolates main res air from the stop flag.

Low pressure flag will raise due to spring tension, and monitoring function of stop flag will be lost

55
Q

For a comeng to run, how many DC circuit breakers need to be cut-in?

A

One

56
Q

If all of the DC Supply circuit breakers were to trip, what would be the effect on the train?

A

It would fail

57
Q

What happens to the train if the Control Circuit Breaker trips in the leading cab?

A

Train will fail

58
Q

What happens to the train if the Control Circuit Breaker trips in a rear cab?

A

Flashing Door Closed Light

59
Q

Which electrical items are affected if the Aux Control Circuit Breaker is tripped?

A

BADSCARS

Bell
Aux Statt
Doors Control
Saloon lights control
Couple/Uncouple
Air con #1 control
Rheo (local)
Self-centring device

60
Q

If Aux Circuit Breaker is tripped whilst doors are open/released, what is the effect on the train?

A

Train will fail

61
Q

If Compressor Governor Circuit Breaker trips in lead car, what is the effect? (2)

A
  • Compressor Governor on that motor will no longer monitor main res pressure
  • Park Brake ON and OFF buttons will not operate in this cab (they are also on this circuit. I think they were running out of circuits)
62
Q

What is the purpose of the Compressor Governor circuit breaker?

A

To electrically isolate the local compressor governor

63
Q

True or false:
The compressor sync circuit breaker is train-lined

A

True

64
Q

What will the effect be on the train if a Compressor Sync Circuit Breaker trips? (2)

A

Local compressor will be operated by local compressor governor only

AND

Remaining compressors will not be affected by compressor governor

65
Q

If Cab Lights and Battery Charger circuit breaker is tripped, what would be the effect? (3)

A
  • 240V AC cab lights will fail
  • 240V AC van area lights will fail
  • 240V AC Battery charger circuit will fail
66
Q

If the PA and Radio Circuit breaker is tripped, and an announcement is made from another motor car, what will the result be to the train?

A

Announcement will not be heard in the car with the tripped circuit breaker

67
Q

What will happen to the train if the DTRS circuit breaker trips?

A

The DTRS would operate on battery backup

68
Q

Which isolating cocks are located above the trip apparatus?

A
  • EC Cock
  • TECHAV Cock
  • Main Res to brake controller isolating cock
69
Q

What functions is the EC cock used to perform? (3)

A
  • Isolates safety apparatus on leading motor
  • Introduces Secondary Circuit
  • Allows train to be driven should primary safety apparatus component fail
70
Q

What is the function of the TECHAV cock? (2)

A
  • Used to isolate safety apparatus on trailing motor
  • Allows train to be driven from opposite end, should primary safety apparatus fail
71
Q

What function does the Main Res to Brake Controller isolating cock serve?

A

In case of fault with brake controller, it allows isolation from this and the rest of the main res system

72
Q

To test the PEIs throughout the train, what button would a driver press on the DDU?

A

CCTV function

73
Q

If there has been loss of power/closed BVICS for less than 3 minutes, what must a driver do to ensure the PIDS are operational?

A

Nothing (OVER 3 minutes is when action is needed)

74
Q

If there has been loss of power/closed BVICS for more than 3 minutes, what must a driver do to ensure the PIDS are operational?

A

Re-enter TDN into the DDU

75
Q

If an error is encountered after attempting to set a TDN into the DDU, what must a driver do on the journey?

A

Make PA announcements

76
Q

Which equipment forms the primary safety apparatus? (6)

A

TECHAV
Trip
Emergency Application Valve
Control Governor
Hand/foot pilot valves
Anti-neutralisation device
VICERS

77
Q

What is used to isolate the primary safety apparatus and allows the train to be operated on the secondary safety apparatus?

A

Red EC cock

78
Q

What must be done to enable a driver to operate a train on the secondary safety apparatus? (4)

A
  • Secure train
  • Turn red EC cock
  • Depress foot pilot valve
  • Press the control governor bypass button
79
Q

After setting the emergency circuit, how long until the control governor bypass button begins to flash?

A

30 seconds

80
Q

After setting the emergency circuit, how long will the control governor bypass button flash for until the penalty brake application is enforced?

A

10 seconds

81
Q

What is the TECHAV cock used for and what is the implication for a train when it is turned?

A
  • Used to isolate safety apparatus on non-driving motor car
  • Train cannot be driven from that car
82
Q

After arriving at a terminal location on the emergency circuit, what must a driver do before changing ends? (3)

A
  • The Red EC cock must be put back to normal
  • Yellow TECHAV cock must be turned across pipe
  • Fault Warning Notice placed in cab
83
Q

Name me a list of eight things that can cause a Flashing Door Closed Light

A
  • Door system fails
  • Control circuit breaker tripped in rear
  • Aux circuit breaker tripped in trailing cab
  • PLC circuit breaker tripped in trailing car
  • Rear motor tail lights in OFF position
  • Open circuit on train cable
  • Coupler sensing it is coupled (after decoupling)
  • Second BVICS open
84
Q

What must a driver do if they experience a FDCL that cannot be rectified?

A

Trip out PLC circuit breakers in each car

85
Q

True or False:
When the Door Systems have been by-passed or isolated, all passengers must be removed from the train and that train will be taken out of service

A

True

86
Q

The PLC circuit breaker is located above which door in each car?

A

3

87
Q

According to the EMU test, which items are connected to the PLC? (5)

A

Shut the Fucking Door Door Door

  • Secondary Release Feature
  • Foot pilot valve
  • Door chimes
  • Door close relay delay
  • Drivers door indicator lights
88
Q

If both headlights are non-operational during daylight hours, what areas of the network is the train restricted to operate at a slower speed? (2)
What is the speed?

A

MURL
West Richmond Tunnel

50km

89
Q

If headlights remain in the ON position after reverser has been set to OFF< what can a driver do to ensure the headlights are not left on after changing ends?

A

Place Headlights Circuit Breakers to OFF and submit a TMM

90
Q

If headlights do not operate automatically when reverser is placed to FWD, what can a driver do?

A

Manually turn headlights on using the panel switch, and submit a TMM

91
Q

After what timeframe will the parkbrake automatically apply if the reverser is set to Neutral?

A

60 seconds

92
Q

True or false:
The Spring Park Brake can be manually released from inside each cab when the reverser is in the OFF position

A

False

93
Q

What piece of equipment allows graduated power to be applied to the traction motors allowing slower acceleration?

A

resistor grids

94
Q

When time notching from the no 1 position, after what time period will the amps begin to step up automatically?

A

20 seconds

95
Q

If a running brake test proves unsatisfactory, what should a driver do? (4)

A
  • Operate the train on Automatic air brake
  • Conduct normal fault finding and report as per FMP
  • Train must be brought to a stand and examined
  • Train controller must be notified
96
Q

For what length of time must a driver press and hold either of the Park Brake buttons?

A

5 seconds

97
Q

What position must the reverser be in to ensure spring park brakes can be released? (3)

A

Forward
Neutral
Reverse

98
Q

Where are the Local Park Brake controls located?

A

In the van area

99
Q

True or false:
The local park brake buttons can be operated with pantos lowered, provided there is sufficient main res pressure.

A

True

100
Q

True or false:
The train-lined park brake buttons can be operated with pantographs lowered, provided there is sufficient main res pressure

A

False

101
Q

If a rupture occurs between the spring park brake isolating cock and the spring park brake cylinder, what actions would a driver take to rectify the fault? (2)

A
  • Close the Spring Park Brake isolating cock
  • Manually release the spring park brake on that bogie
102
Q

If a rupture occurs between the local spring park brake buttons and the spring park brake isolating cock, what actions would a driver take to rectify the fault? (3)

A
  • Turn both Spring Park Brake isolating cocks on that car
  • Manually release the spring park brakes on that car
  • Press the Local Spring Park Brakes ON button
103
Q

How many turns of the Knorr Knurled Knob to release the spring park brake?

A

1

104
Q

On a Westcode, how many turns of the hexagonal nut to release the spring park brake?

A

6-8

105
Q

If a single control res was isolated on a train, how could a driver isolate the lineswitch light from illuminating whilst powering?

A

By turning the traction motor cut-out switch on the affected motor to ‘all out’

106
Q

What happens to a train if there is insufficient control res air pressure?

A

The line breakers on that car may not close or may close slowly

107
Q

If a control res develops a rapid air leak, why must it be isolated? (2)

A
  • to prevent main res pressure from falling
  • to prevent continuous running of air compressors
108
Q

What happens to a train if a compressor governor isolating cock has been turned to isolate?

A

All compressors would run continuously

109
Q

What effect would a compressor governor with contacts permanently closed have on the air compressors?

A

All compressors would run continuously

110
Q

When power has been restored to a section after a loss, Metrol may instruct drivers to commence powering. When doing so, the Master Controller must be held in Series until traction falls below what amperage?

A

100 amps

111
Q

When power has been restored to a section after a loss, Metrol may instruct drivers to raise pantographs. At what intervals will Metrol ask each driver to do this?

A

60 second intervals

112
Q

What should a driver check (after levelling valve linkages and air bags themselves) if the air suspension on a car is found to be deflated?

A

Air Suspension Isolating Cocks are in open position

113
Q

True or False:
The trip must be in the lowered position to conduct the VICERS test

A

True

114
Q

What does the illumination of the RHEO BRAKE fault light indicate?

A

Rheo brake has failed to set up correctly on a motor car

115
Q

How can a driver attempt to reset a rheostatic brake fault?

A

With the Traction Equipment Reset button

116
Q

The control circuit supplies 110v DC for the operation of: (7)

A
  • Master controller and reverser
  • Traction equipment and reset button
  • Remote panto reset button
  • Remote panto lower button
  • Electric brake demand circuit
  • Speedo
  • Control governor
117
Q

What to do if the control circuit breaker trips after pushing the Panto Raise button? (2)

A
  • Raise pantos manually in each motor using the Local Panto Raise buttons
  • Send a TMM
118
Q

What to do if the control circuit breaker trips after pushing the Panto Lower button? (3)

A
  • Reset the control circuit breaker
  • electrically isolate the pantograph EP valve with the switch
  • Press the remote Panto Lower button

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