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Metro Traineeship > Traction: Comeng > Flashcards

Traction: Comeng Flashcards

1
Q

What three things do the LP flag on the driver’s console indicate when it is in the raised position?

A
  • Pressure in main reservoir is below a safe level (500 kPa)
  • EP brake is inoperative due to failure or isolation of power supply to the Lock Out Magnet Valve
  • Brake Valve Isolating Cock and Switch (BVICS) is closed
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2
Q

What faults can cause the FDCL (Flashing Door Closed Light) to flash despite the doors being closed? (8)

A
  • Control Circuit Braker tripped in a rear cab
  • Rear motor tail lights turned off
  • Auxillary Circuit Breaker tripped in another cab
  • PLC circuit breaker tripping in any trailing car
  • Door System Faults
  • Open circuit in the Train Cable
  • The train not registering a decoupling having taken place
  • Second BIVCS open
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3
Q

Where is the PLC located?

A

Above door no. 3 on all motors and trailers

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4
Q

What are the items related to the PLC?

A
  • Secondary release features
  • Foot Pilot Valve
  • Door Loop Bypass
  • Door Chimes
  • Door Closing Relay
  • Driver’s Door Indicator Lights
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5
Q

What applies and removes the spring park brake?

A

Applies: spring force
Removes: pneumatic/air force

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6
Q

How does a driver apply/release the train-lined Spring Park Brakes?

A

Apply: Press the red ON button for 5 seconds.

Remove: Press green OFF button for 5 seconds

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7
Q

After a Motor Alternator becomes energised, how long until Train-Lined buttons become available?

A

60 seconds

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8
Q

When do all spring park brakes automatically apply?

A
  • When reverser is moved to OFF
  • 60 seconds after reverser is placed in neutral
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9
Q

The spring park brakes will remain released if the train is travelling above what speed? (provided reverser is not in OFF)

A

8km/h

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10
Q

How many turns of the Knorr Knurled Knob to release the Spring Park Brake?

A

1

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11
Q

How many turns of the Knorr Knurled Knob to apply the Spring Park Brake?

A

none

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12
Q

How many turns to apply the Spring Park Brake on a Westcode?

A

40 - 60

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13
Q

How many turns to release the Spring Park Brake on a Westcode?

A

6 to 8

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14
Q

Can you manually apply a spring park brake while main res air is being supplied to the spring park brake cylinder?

A

No, you will fuck up the mechanisms.

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15
Q

What are the four positions of the Reverser?

A
  • Off
  • Forward
  • Neutral
  • Reverse
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16
Q

What are the five positions of the Master Controller?

A

0 Off (Coasting)
1 Shunt
2 Series
3 Series - Parallel
4 Weak Fields

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17
Q

What circuit breaker and power voltage are master controller and reverser connected to?

A

Control Circuit Braker - 110v DC

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18
Q

What are the two sub-units of the VICERS system?

A
  • Vigilance Control System
  • Event Recording System
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19
Q

What comprises the VICERS Vigilance Control System? (5)

A
  • Task linking of driver controls
  • Vigilance acknowledgement button
  • Vigilance audible buzzer
  • Vigilance fault indicator
  • Vigilance Activation Valve
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20
Q

What comprises the VICERS Event Recording System (2)?

A
  • VM40 Event Recorder
  • Roof-mounted antenna
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21
Q

What equipment on the Comeng is task-linked to the VICERS? (3)

A
  • Master Controller
  • Brake Controller
  • Whistle
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22
Q

What voltage powers the VM40 event recorder?

A

110v DC

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23
Q

What four steps are required to reset the VICERS application valve?

A
  • Reduce brake pipe below 25 kPa (but above 0 - brake into emergency)
  • Have speed at 0
  • Wait 10 seconds
  • Press Vigilance Acknowledgement button
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24
Q

What are the required conditions for performing a VICERS test?

A
  • Brake pipe above 500 kPa
  • Reverser in Off
  • Trip lowered and set
  • BVICS is open
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25
Q

What are the five steps to lowering the trip (cutting in)?

A
  • Open BVICS and charge brake pipe to 550 kPa
  • Flick Trip lever to DOWN
  • Brake controller into emergency (exhaust all air)
  • Brake controller into run and release (charge brake pipe)
  • Brake controller into Step 7 EP brake.
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26
Q

What are the two ways a trip can be reset?

A
  • Brake controller into emergency
  • Manual button on top of Trip Valve
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27
Q

What is the VICERS timing cycle?

A

Flashing light 5 seconds
Audible buzz further five seconds
(10 seconds total)

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28
Q

What does BVICS stand for?

A

Brake Valve and Isolating Cock Switch

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29
Q

How long after loss of power until a TDN will need to be re-inserted?

A

3 minutes

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30
Q

When should a driver answer a PEI call?

A

When safe to do so

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31
Q

How long until a PEI times out?

A

90 seconds

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32
Q

What should a driver do if the PEI times out?

A

Make a PA asking passenger to re-contact, when safe to do so

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33
Q

What positions of the reverser requires the application of the pilot valve?

A

Forward and reverse (not required in off or neutral)

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34
Q

At what brake pipe pressure does the control governor open to cut power to the master controller?

A

310 to 340 kPa

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35
Q

After the control governor has cut power to the master controller after a drop in brake pipe air, what pressure will cause it to close, thus restoring traction power?

A

400 to 430 kPa

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36
Q

What are the components of the Primary Safety Apparatus?

A
  • Trip
  • Emergency Application Valve
  • Control Governor
  • Hand/foot pilot valve
  • Anti-neutralisation device
  • VICERS activation valve
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37
Q

What are the components of the Secondary/Emergency Safety Circuit?

A
  • Foot activated pilot valve
  • Emergency pilot valve
  • Emergency control governor
  • Control governor bypass button
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38
Q

What are the five steps to enabling the emergency circuit?

A
  • Secure train (cab unattended)
  • Turn Red EC
  • Isolate VICERS using key switch
  • Activate foot pilot valve
  • Press red Control Governor Bypass button
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39
Q

When does the emergency control-governor bypass button begin to flash and how long will it flash for before commencing an emergency brake?

A

Flashes after 30 seconds, will flash for a further 10 seconds.

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40
Q

What will happen if a non-driving cab has the Red EC isolated?

A

Brake pipe will not charge (yellow TECHAV cock must be isolated instead)

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41
Q

A driver must make a running brake test when: (3)

A
  • Change of driver
  • Change of direction
  • Alteration of consist
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42
Q

When do we perform a low-speed running brake test

A

If we haven’t prepped train ourselves - in yard only

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43
Q

When must a driver perform a service brake test? (5)

A
  • Changing ends
  • Reliving a train
  • After attaching/dividing
  • Following defect/alteration of braking equipment
  • transitioning from dry to wet rail
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44
Q

What are the seven steps of Full Cab Unattended before the driver leaves the cab?

A
  • Make PA (if necessary)
  • Marker lights to White
  • Reverser to Off
  • Observe park brake lights on dash and behind divider
  • Brake controller into Emergency
  • Close BVICS
  • Brake controller into Run and Release to recharge brake cylinder
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45
Q

What steps must a driver make when leaving/returning to cab for Full Cab Unattended?

A
  • Remove controller key
  • Check park brake gauge
  • Take all keys and radio with TDN inserted
  • Close/lock doors and windows
  • Exit cab
  • Perform duties
  • Return to cab
  • Open BVIC/reinsert TDN
  • Marker lights to Auto
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46
Q

What are the steps for a Modified Cab Unattended?

A
  • Leave BVICS open
  • Brake controller in Step 7
  • Marker lights to White
  • Reverser to Off
  • Observe park brake light
  • Turn up cab radio
  • Remove controller key
    Exit cab
    Perform duties
    Return to cab
  • Insert controller key
  • Marker lights to Auto
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47
Q

On stabling a train, where do we lower pantographs from?

A

Trailing motor

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48
Q

In a Comeng, do we lower pantographs before or after turning off saloon lights?

A

After

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49
Q

During train start-up, where do we raise the pantographs from?

A

Leading car

50
Q

What power does the air compressor run on?

A

1500v DC

51
Q

How much air does the main res need for the pantograph electro magnetic valves to be operational?

A

500 kPa

52
Q

To raise the local pantographs:

A
  • Min 500 kPa in main res
  • Press local Panto Raise EP
  • Observe pantos have raised
  • Press local MA start
  • Release both saloon doors
53
Q

To raise remote pantographs:

A
  • Press train-lined Pantograph Raise button
  • Press train-lined Aux Start
  • Observe pantos have raised
54
Q

What colour is the pantograph storage reservoir handle?

A

Blue

55
Q

After the motor alternator starts, how long until the park brake ON valve is energised and the remote park brake ON button illuminates?

A

60 seconds

56
Q

What isolating cock will isolate the Low Pressure flag?

A

The EP MR flag (Electro-pneumatic main reservoir flag)

57
Q

What are the five isolating cocks behind the panel door in the van area?

A
  • Panto EP isolate
  • MA EP isolate
  • Trip gear isolate
  • BP sensor isolate
  • Panto and MA isolate
  • EP MR isolate
58
Q

What reservoir supplies the trip?

A

Control reservoir

59
Q

What colours are the needles in the duplex gauge?

A

Red = main res
White = brake pipe

60
Q

What does the Local light on the fault display indicate?

A

Overloaded trip within traction equipment or rheostatic braking

61
Q

Air conditioner fault lights:
What do Off, Steady and Flashing indicate?

A

Off = all aircons operational
Steady = one aircon has failed in at least one carriage
Flashing = two air cons have failed in one carriage

62
Q

How long do emergency marker lights operate for? When do they start flashing?

A

Two hours. They flash after 1hr 45.

63
Q

When active, how often does the MAD button flash and give an audible beep?

A

Every 10 seconds

64
Q

What four things do the BVICS control?

A
  • Main res air to auto air brakes/into BP through brake controller
  • Electrical current to the EP and rheo brakes
  • Electrical current to the LP flag and lock-out magnet valve
  • electrical current to the door monitoring circuits for the blue door closed lights
65
Q

What is protected by the Control Circuit Breaker? (6)

A
  • Master controller
  • Rheo brake
  • Panto raise/lower
  • Traction overload reset
  • Control gov
  • Control circuit reverser
66
Q

What is protected by the Auxiliary Control Circuit Breaker? (8)

A
  • Bell
  • Aux start
  • Door release/close
  • Saloon lights on/off
  • Couple/uncouple
  • Air con #1
  • (local) Rheo
  • Scharfenberg self-centring
67
Q

Is the compressor governor circuit breaker train-lined? What does it protect?

A

Protects 110v DC compressor gov circuit. Not train-lined.

68
Q

Is the CCTV/PIDS circuit breaker train lined?

A

No, it’s local

69
Q

What configuration can traction motors be isolated in without a key?

A

Completely (not in pairs)

70
Q

What is needed to isolate pairs of traction motors?

A

Controller key

71
Q

When attaching, how far short of the other unit must you stop?

A

1 metre

72
Q

What are the three types of braking?

A

Rheostatic (motor car only)
Electro-pneumatic
Automatic air brake

73
Q

What are the three positions for the Automatic Air Brake?

A
  • Run and release
  • Service zone
  • Emergency
74
Q

How do the brakes differ on a Knorr vs a Westcode?

A

Knorr = disc
Westcode = tread

75
Q

Will the rheostatic brake operate if the EP brake is isolated?

A

No

76
Q

At what speed does the EP brake begin to apply?

A

10km/h

77
Q

What speeds do blended braking operate between?

A

5 to 10 km/h

78
Q

What speeds does the rheostatic brakes operate between?

A

115km/h and 5km/h

79
Q

What is the holding pressure required for Westcode and Knorr trains?

A

Westcode: 35 kPa
Knorr: 0 kPa

80
Q

What is the preparation time allowed for stabling trains?

A

6 car: 8 mins
3 car: 4 mins

81
Q

What is the preparation time allowed for post-maintenance prep?

A

6 car: 60 mins
3 car: 30 mins

82
Q

What is the preparation time allowed for mainline prep?

A

6 car: 37 mins
3 car: 20 mins

83
Q

What is the preparation time allowed for revenue/pre-movement prep?

A

6 car: 18 mins
3 car: 10 mins

84
Q

How much preparation time is allowed for pre-departure checks?

A

3 mins all trains

85
Q

At what pressures is the Control Governor tested, opened and closed at?

A

TEST: >290
OPENS: 310 - 340
CLOSES: 400 - 410

86
Q

What is brake pipe operating pressure and minimum reduction?

A

OP: 550 kPa
min red: 50 kPa

87
Q

What is brake pipe pressure after full-service reduction?

A

380 - 410 kPa

88
Q

What is the control reservoir minimum pressure?

A

490 kPa

89
Q

What are the pressures for trip lowering, reset and test?

A

Lower: 500 kPa
Reset: 0 kPa (below 25)
Test >150 kPa

90
Q

What is the brake pipe pressure required for continuity test?

A

> 300

91
Q

What are the requirements to test the trip? (7)

A
  • BVICS is open
  • Trip is lowered
  • Brake pipe is at operating pressure
  • Reverser is off
  • Brake handle at step 7
  • Headlights to high beam
  • Marker lights to white
92
Q

What kPa should the brake pipe reduce to after a trip test?

A

below 150 kPa

93
Q

What is the function of the Release Prevention Valve?

A

Used with Auto Air Brake. Prevents main res air to the regulating valve in service zone. Ensures air will only be released in Run and Release

94
Q

What is the function of the Regulating Valve?

A

Regulates pressure.
Reduces main res pressure to a control pressure, ensures equalising res duplicates in BP.
Maintains BP pressure at 550kPa when EP brake in use.

95
Q

What is the function of the Relay Valve?

A

Controls air in/out of brake pipe to pressure set by equalising res.

96
Q

What is the function of the Charging Valve?

A

Allows Main Res air to flow to the relay valve to charge brake pipe. It’s open in all pos. except EMERGENCY.

97
Q

What is the function of the Lock-out Magnet Valve and Ball-Check Valve?

A

When energised, prevents simultaneous use of auto air brakes and EP brakes, by preventing use of air brake. Powered by EP circuit breaker. When tripped, Air Brakes will be introduced.

98
Q

Function of the Equalising Reservior?

A

Air pres for this comes from regulating valve. Aids in smoother operation of relay valve when exhausting BP air.

A leak in the Equalising Res will cause BP air depletion

99
Q

What tasks need to be completed in a Mainline Prep? (5)

A
  • Visual inspection (all motors)
  • External inspection (all cars)
  • Full Cab inspection - Lead/Trailing motors
  • Continuity Test
  • Pantograph test
100
Q

What tasks need to be completed in a Post Maintenance Prep? (5)

A
  • Visual inspection (all motors)
  • External inspection (all cars)
  • Full Cab inspection (all motors)
  • Continuity Test
  • Pantograph test
101
Q

What is involved in a Full Cab Inspection? (4)

A
  • Brake Test
  • Hand/Foot Pilot Valve and CG Test
  • VICERS test
  • Trip test
102
Q

What is involved in a Modified Cab Inspection? (3)

A
  • Brake Test
  • Hand/Foot Pilot Valve and CG Test
  • Trip test (not req. pre-movement)
103
Q

What are the steps of the Automatic Air Brake Test? (8)

A
  • BP fully charged, trip EP circuit breaker
  • Brake handle to STEP 2 and observe LP flag, (BP reduction, BC increases)
  • Move through SERVICE ZONE to FULL SERVICE and observe BP reduction, BC increase
  • Back to Minimum Reduction, leave handle for 10 secs to observe no changes
  • EMERGENCY (BP to 0)
  • Run and Release (BP to operating pressure, BC to 0)
  • Reset EP circuit braker
  • Step 7 EP
104
Q

What are we testing when we put the brake handle into EMERGENCY?

A

Opening of Emergency Exhaust Port and closing of Charging Valve

105
Q

What are we testing when we put the brake handle into Run and Release?

A

Closing of Emergency Exhaust Port and opening of charging valve

106
Q

How do we perform an EP brake test and what are we testing?

A
  • Brake controller into RUN AND RELEASE. BC to 0
  • Ensure BP at op. pressure.
  • Move controller through each step.

We are testing that the A, B and C wires are communicating with the 7-step relay

107
Q

What happens when the brake handle is in Step 2 and we trip the EP circuit breaker?

A

It simulates a loss of overhead power by de-energising the Lock-Out Magnet Valve. Low-Pressure flag should raise.

108
Q

What happens in an Air Brake Test when we move through service zone?

A

The regulating valve, relay valve and equalising reservoir should reduce BP according to position of brake controller handle

109
Q

What are the requirements to perform the Hand/Foot Pilot Valve and Control Governor Test? (5)

A
  • BVICS open
  • Trip lowered
  • Reverser OFF
  • BP at operating pressure (550 kPa)
  • Saloon doors are CLOSED
110
Q

What is the Pantograph Test procedure?

A
  • Saloon lights on
  • Press remote Panto Down button
  • Observe them lowering within 10 sec
  • Observe battery charger fault light
  • Observe stabling status fault light
  • Observe DC supply dault light
  • Check BP reduce to 380 - 410
111
Q

What is the purpose of the Lock Out Magnet + Ball Check valve?

A

Prevents simultaneous application of Auto Air Brake and EP brake

112
Q

Purpose of the Variable Load Valve?

A

Monitors air suspension pressure and adjusts brake cylinder air accordingly for good breaking etc

113
Q

What do release ensuring valve and dump valve prevent?

A

Sticking brakes

114
Q

Purpose of Bypass Check Valve?

A

Passage for EP brake air to reach cylinders

115
Q

Where does Hand Release Valve release air from?

A

Brake cylinders

116
Q

Aux res air is charged by what source of air pressure?

A

Brake pipe air pressure

117
Q

EP braking uses air from which source?

A

Main res

118
Q

When attaching two Comenges how far must the attaching driver stop?

A

3m

119
Q

What does the blue “supply” light indicate?

A

110v DC is being supplied remote controlled circuits

120
Q

What res provides air to panto storage res?

A

main res

121
Q

How can the rheo brake be isolated?

A

Tripping the EP circuit braker

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