Ask Yourself Flashcards
1
Q
How will a driver identify a defective Compressor Governor?
A
• MR needle will fall below 580 kPa prior to compressors operating
• Compressors fail to cut out at 725 kPa
2
Q
How can a driver isolate a defective Compressor Governor?
A
By tripping the compressor governor CB
3
Q
What will the effect be of a tripped Compressor Governor Sync Circuit Breaker?
A
Compressors will operate independently, leading to inconsistent air supply and potential MR pressure fluctuations.
4
Q
How will a driver identify the location of a loss of Main Reservoir pressure?
A
Monitor the Duplex Gauge:
Check for abnormal drops in Main Reservoir pressure (normal range: 585–725 kPa).
Perform a Full Cab Unattended Procedure:
Secure the train and de-activate the cab.
Inspect the Train:
Walk along the train, listening for air escaping from the Main Reservoir system.
Focus on areas near the Main Reservoir pipes, tanks, and connections.
Check the Compressor System:
Verify that compressors are running and not overloading.
Sectional Isolation:
Isolate sections of the train to pinpoint the source of the air leak
5
Q
What steps does a driver take when the Main Reservoir pipe rupture is on the leading car and there is a competent employee available?
A
Secure the Train:
Apply the Emergency Brake and secure the train.
Notify Train Control to get competent Employee
Isolate the MR Pipe:
Close the Main Reservoir End Cock on the leading car while keeping the Brake Pipe End Cock open.
Ensure the Spring Park Brakes are released; manually release if necessary.
Charge the MR System:
Charge the train’s air system using compressors from trailing motor cars.
Relocate to Functional Cab:
Close the BVICS in the leading cab.
Perform Brake Test:
Conduct a continuity test to confirm proper brake operation in all cars except the isolated leading car.
Proceed at reduced speed, relying on the remaining braking systems.
Submit TMM
6
Q
How will the train be removed from the section if no competent employee available?
A
• Isolate Faulty Equipment: Secure and isolate defective systems.
• Operate from Functional Cab: Move to a working cab if needed.
• Use Alternate Brakes: Rely on Automatic Air Brake or EP Brake.
• Proceed at Reduced Speed: Operate cautiously and notify Train Control.
• Submit a TMM: Log isolation details and actions taken
7
Q
How does a driver operate the train when the No 1 Main Reservoir End Cock has been broken off?
A
By plugging the open pipe with a wooden plug.
8
Q
What does a driver have to do if the Main Reservoir pipe rupture is under a Trailer car?
A
9
Q
What does a driver have to do if the Main Reservoir pipe rupture is under any other motor car?
A
10
Q
How does a driver rectify a ruptured Main Reservoir tank?
A
• Close MR Delivery IC
• Place Compressor Contactor ISO Switch to OFF
• Isolate Compressor Governor Circuit Breaker
11
Q
What does a driver have to do if the Automatic Drain Valve has been damaged?
A
• Plug the pipe from the brake cylinder of number 1 bogie to the auto drain valve.
• Submit TMM to TC
12
Q
What does a driver do if the flexible hose bursts between cars?
A
• Close the MR end cocks on both sides of affected hose
• Submit TMM to TC
13
Q
What are the speed restrictions imposed if there is a deflated / isolated air bag?
A
Half the line speed for that section to a maximum of 30 km/h
Example: 80km = 30km/h
40 km/h = 20 km/h
14
Q
What steps does a driver have to take when dealing with a rupture in the Control Reservoir system?
A
• The Control Reservoir must be isolated by turning the Control Reservoir IN isolating cock to ISOLATE
• The motor cut-out switch is to be turned to ALL OUT
• Submit TMM to TC
15
Q
How does a driver try to rectify a whistle defect?
A
• Operate whistle lever rapidly
• Inspect whistle isolating cock (open and close rapidly)
• if not rectified whistle must be isolated
16
Q
What can cause a Flashing Door Closed Light in a Comeng train?
CRAPDOTS
A
• Control Circuit breaker tripped in last motor
• Rear motor marker lights
• Aux circuit breaker tripped in last motor
• PLC isolated
• Doors failing to close
• Open circuit train cable
• Train coupler not registering
• Second BVICS open
17
Q
How can a Comeng train obtain traction power with a continuously Flashing Door Closed Light?
A
Door Loop Bypass Key Switch
18
Q
What must a driver do with any passengers when the Door Loop System is by-passed?
A
Detrain them
19
Q
What is the maximum amount of saloon doors that can be isolated on each side of each car and still remain in revenue service?
A
1 per side per car
20
Q
What can be the cause of all doors failing on one side of a carriage?
A
Electrical or Pneumatic
21
Q
What can be the cause of all doors on a carriage being inoperative?
A
• Pneumatic ICs (Door Systems) or Electrical CBs
22
Q
What can be the cause of all doors on the train failing?
A
• local remote-control circuits out of action
• Auxiliary control circuit breaker tripped
23
Q
How can a driver manually release the saloon doors if they are locked shut?
A
Turn door isolating cocks to OFF position so self bleeder can remove air pressure
24
Q
How are defective saloon doors secured on a Comeng train?
A
Temporary door locking device
25
How many Temporary Door Locking devices must a driver carry?
At least 1
26
Where can a driver locate replacement Temporary Door Locking devices?
TSO-PDS
27
What type of saloon lighting defects can occur on Comeng trains?
Mechanical, Electrical or Pneumatic
28
How does a driver try to rectify the whole train lighting being inoperative?
• Observe at-least 1 Panto is raised
• Check 110 v DC supply light
• Trip and reset Aux MCB
• press saloon button 3 times then press and hold for 5 seconds
29
How does a driver rectify half saloon lighting in one unit?
• Pressing the Traction Equipment Reset button
• Locally stopping and starting the inoperative MA
30
How does a driver rectify half saloon lighting in one car only?
• Press and hold the Saloon light ON button 3 times for 5 seconds
• reset Saloon Lighting MCB above Door 3 if required
31
How does a driver rectify the saloon lights being inoperative in one car in a regular sequence?
• examine lighting circuit breakers and isolation switches above door 3
• reset any tripped CBs
• ensure iso switches are in NORMAL position
• Press saloon lights ON button 3 times for 5 seconds
32
What operating restrictions are in place when all saloon lights including emergency are defective?
• Not to operate during hours of darkness
• Through the Murl
33
What type of communication methods can be used during electrically coupled train rescue?
110V DC Bell system
34
What must be checked prior to the coupling of the trains?
• Drivers must ensure the Park Brakes are applied in each cab.
• Inspect the general condition of the coupler.
• Ensure the Brake Pipe and Main Reservoir Pipe end cocks are open.
• Isolate the Electrical Coupling heads by turning the Yellow lever.
• If the disabled train’s pantographs are lowered, isolate the Yellow TECHAV cock on each cab to bypass primary and secondary safety devices
35
How is a Comeng pushing another Comeng performed?
After coupling, the driver of the disabled train:
• Releases Park Brakes.
• Walks to the leading cab for the direction of travel.
• Isolates the VICERS key switch and the EP Brake Circuit Breaker.
The driver of the assisting train:
• Isolates various systems, including the VICERS and Door Loop Bypass.
• Applies and isolates the Automatic Air Brake.
• Turns the Red EC cock and sets the Foot Pilot Valve.
36
How is a Comeng pulling another Comeng performed?
After coupling, the driver of the disabled train:
• Stays in the cab coupled to the assisting train.
• Isolates the VICERS key switch.
• Raises the Trip.
37
How is a Comeng pushing a Siemens performed?
The assisting Comeng inspects and couples the trains.
The Siemens driver:
• Puts the Brake Pipe Mode switch to “Pushed by Other Train.”
• Activates the Brake Pipe Mode key switch.
• Isolates the Traction Control Unit (TCU) MCB in all cabs.
A Continuity Test is performed, and communication is maintained
38
How is a Comeng pulling a Siemens performed?
The Siemens driver remains in the cab coupled to the assisting train and:
• Turns the Brake Pipe Mode switch to “Pulled by Other Train.”
• Activates the Brake Pipe Mode key switch.
• Isolates the Traction Control Unit (TCU) MCB in all cabs.
The Comeng driver prepares the leading cab, isolates systems, and conducts a Continuity Test.
39
How is a Comeng pushing an X'Trapolis performed?
The X’Trapolis driver:
• Applies Park Brakes.
• Turns the EMS to “Rescued.”
• Ensures the Brake Pipe Mode key switch is activated.
The Comeng driver:
• Prepares the cab coupled to the X’Trapolis.
• Ensures Train-lined Park Brakes are applied.
• Conducts a Continuity
40
How is a Comeng pulling an X'Trapolis performed
The X’Trapolis driver:
• Stays in the cab coupled to the assisting train.
• Activates the cab and sets the EMS to “Rescued.”
• Observes key fault and status lights.
The Comeng driver proceeds to the leading cab, prepares it, and performs a Continuity Test.
41
How is a Comeng pushing a Diesel hauled train performed?
The Diesel train’s coupler is equipped with a Transition Coupler.
The Diesel driver:
• Follows company-specific setup procedures.
The Comeng driver prepares the cab coupled to the Diesel train, isolates systems, and performs a Continuity Test.
42
How is a Comeng pulling a Diesel hauled train performed?
The Diesel train’s coupler is equipped with a Transition Coupler.
• The Comeng driver prepares the leading cab, isolates systems, and performs a Continuity Test.
• Both drivers ensure communication is maintained throughout the recovery process
43
What does an illuminated LOCAL fault light mean?
Indicates a traction equipment fault, such as traction overloads or other protective devices being tripped.
44
What can cause traction equipment faults?
Control reservoir faults: Low or insufficient compressed air (490 kPa +/- 20 kPa).
Pneumatic leaks: Affecting the control reservoir or related systems.
1500 V DC failure: A pantograph may not be in contact with the overhead wire.
Traction overloads tripping: Protective devices cutting power to prevent damage.
Circuit breaker failures: Disrupting power supply or causing train-lined faults.
45
What button is utilised to reset traction faults?
The Traction Overload Reset Button
The Master Controller must first be placed in the NEUTRAL position before pressing this button.
46
What are the positions of the Traction Cut out switch?
ALL IN (Normal): All traction motors active.
1 & 2 OUT: Isolates traction motors 1 and 2.
3 & 4 OUT: Isolates traction motors 3 and 4.
ALL OUT: Isolates all traction motors on that car
47
How are traction faults isolated?
• Place the Master Controller to OFF.
• Remove the controller key and unlock the Traction Cut-out switch.
• Set the Traction Cut-out switch to 1 & 2 OUT and press the Overload Reset Button to test the train.
• If the fault persists, set the switch to 3 & 4 OUT, press the reset button, and test again.
• If the fault is still present, set the switch to ALL OUT and press the reset button.
• After isolation, the Local, Line Switch, and This Car lights should extinguish.
48
What are the initial steps to take before the ROBBDS test?
Trips, Switches, Gauges and Cocks
Trip:
• Ensure the trip is lowered and reset.
Switches:
• Confirm switches are in their normal positions.
• Verify circuit breakers are in their normal positions.
• Ensure the “Doors Closed” button is activated (blue light steady).
Gauges:
• Check main reservoir, brake pipe, and control reservoir air pressures are within tolerances.
Cocks:
• Confirm the BVICS is open (if brake pipe pressure is low).
• Ensure the red emergency circuit cock and yellow TECH cock are in the normal position.
49
What does ROBBDS stand for?
• R: Reverser
• O: Traction Overload Reset
• B: Brake Pipe Reduction
• B: Control Governor Bypass
• D: Door Loop Bypass
• S: Second Master Controller
50
What steps does a driver take when the Main Reservoir pipe rupture is on the leading car and there is a competent employee is NOT available?
Train must be declared disabled
51
What are the 2 pressure settings of the compressor governor?
High: 725 kPa
Low: 585 kPa
52
What is the Main Res safety valve set to?
775 kPa
53
What is connected to the MR air system on a Comeng?
54
What is equipment connected to the Comeng 1500 v DC system?
• Pantographs
• Motor Alternators
• Compressors
• Traction Equipment
55
What are the steps to take when communication is available and a loss of overhead power occurs?
• Confirm the train has stopped safely.
• Contact the Train Controller.
• Check that the Loss of Overhead Shutdown Module (LSM) Power switch is ON.
• Lower all pantographs and confirm trailing pantographs are down.
• Press the Local MA EP Stop valve and Local Pantograph EP Stop valve as instructed.
Wait for the Train Controller to coordinate with Electrol for an overhead power reset.
56
What are the steps to take when there is no communication and a suspected loss of overhead power has occurred?
• Perform a Risk Assessment of the area (check for overhead wire conditions, location, and train movements).
• Inspect Trip, Switches, Gauges, and Cocks to eliminate other faults.
• Check for the presence of 110 V DC power:
• Operational bell.
• Lowered Low Pressure (LP) flag.
• EP brake functionality.
If no 110 V DC power, check for 240 V AC power:
• Saloon and cab lights.
• Headlights.
If no power is present:
• Attempt a local Motor Alternator (MA) restart.
• Lower and raise the local pantograph and ensure good contact with the overhead wire.
57
What is the purpose of the LSM?
• Reduce the risk of overloading substations when power is restored.
• Isolate defective circuits and high-power demand equipment during power loss.
• Automatically manage shutdowns based on the train’s speed, time, and BVICS status.
58
What are the components of the LSM?
• Time Delay Relay:
Times shutdown actions over a 4-minute delay period.
• Speed Threshold:
Monitors train speed, set at 8 km/h, to trigger specific actions during power loss.
59
How does the LSM affect the train when a loss of power occurs when the train is over 8 km/h?
If the train is moving above 8 km/h:
• The LSM does not trip circuits immediately.
• Automatic braking is not activated unless the train decelerates to below 8 km/h.
60
How does the LSM affect the train when aloss of power occurs when the train is below 8 km/h?
If the train is moving under 8 km/h or stationary for less than 4 minutes:
• The LSM trips the EP circuit breaker, causing the LP flag to rise.
• All trailing pantographs are lowered, and trailing Motor Alternators are shut down.
• The train relies only on the Automatic Air Brake for stopping.
61
How does the LSM affect the train when a loss of power occurs when the train is stationary and all BVICS have been closed in excess of 4 minutes?
If the train is stationary and BVICS are closed for over 4 minutes:
• The LSM activates fully:
• All pantographs are lowered.
• All Motor Alternators are shut down.
• The train cannot power until reset.
62
What will happen to the VICeRs system after a loss of 1500 v DC power in excess of 5 minutes?
• The VICERS Activation Valve will open, exhausting Brake Pipe air to the atmosphere.
• Main Reservoir air will deplete as it tries to recharge the Brake Pipe.
• Once overhead power is restored, VICERS will reset automatically.
63
What steps are to be taken to identify defective 1500 v DC equipment on a Comeng train?
Lower all pantographs.
• Raise each pantograph individually and start its Motor Alternator.
• Monitor for overhead power loss during these steps.
• If power is lost, isolate the defective pantograph and set the Motor Cut-Out switch to ALL OUT.
64
What equipment can be affected by a weak substation?
• Traction
• Rheostatic brake performance.
• Air conditioners.
• Motor Alternators
65
What notch of the Master Controller must be used when encountering a weak substation area?
Series
66
What faults are indicated on the drivers fault panel?
LF, LS, MA, RB, AC, WS, PB, FP
Local Fault Light: Indicates a traction or rheostatic brake overload on a motor car.
Line Switch Fault Light: Indicates a line breaker failure on a motor car.
Motor Alternator (MA) Fault Light: Indicates a motor alternator is not running or producing output.
Rheostatic Brake Fault Light: Indicates a rheostatic brake setup failure.
Air Conditioner Fault Light: Illuminates or flashes for air conditioner failures.
Wheel Slip Indicator and Fault Light: Indicates wheel slip or a defective wheel slip unit.
Park Brake Light: Indicates one or more spring park brakes are applied.
Foot Pilot Valve Light: Indicates the status of the foot pilot valve.
67
What defects can be caused by a Control Circuit Breaker tripping?
• Inability to remotely raise or lower pantographs.
• Inability to reset traction equipment overloads.
• Loss of traction power from the Master Controller.
• Failure of the rheostatic brake.
• Loss of functionality for the speedometer and Control Governor
68
How does a driver rectify Control Circuit Breaker faults affecting the buttons?
• Reset the Control Circuit Breaker.
• Manually operate the pantographs using the local EP valves (for Raise or Lower).
• Electrically isolate the defective EP valve, if needed.
• Submit a Train Malfunction Message (TMM) to the Train Controller
69
How does a driver rectify Control Circuit Breaker faults affecting the Brake Demand wire?
• Isolate the local rheostatic brake by switching it to ISOLATE.
• Reset the Control Circuit Breaker.
• If it stays set, proceed with the local rheostatic brake isolated.
• If it trips again, return the rheostatic brake to NORMAL and trip the EP circuit breaker.
• Operate the train using the automatic air brake.
Submit a TMM to the Train Controller.
70
How does a driver deal with Ancillary Equipment faults?
• Identify affected circuit breakers (e.g., auxiliary control, EP brake, or compressor governor circuit breakers).
• Reset the circuit breaker if possible.
• Manually operate equipment if remote operation fails.
Submit a TMM if the fault persists
71
How is a pantograph isolated?
• Press the Pantograph Lower EP valve to lower it.
• Isolate the Pantograph EP isolating cock.
• Toggle the Pantograph Electrical Switch to OFF.
• Set the Motor Cut-Out switch to ALL OUT for the affected car.
• Submit a TMM to the Train Controller.
72
What can cause failures of a Motor Alternator?
• Electrical failure of the 1500 V DC supply.
• Air leaks in the Motor Alternator contactor system.
• Loss of main reservoir air supply.
• Overspeeding of the Motor Alternator.
• Isolation of the Pantograph or Motor Alternator systems.
• A lowered pantograph on the associated car.
73
What happens when a Motor Alternator over speeds?
• It shuts down automatically.
• To reset, the Over Speed Trip must be manually reset (e.g., using a switch stick for General Electric models or a reset lug for Mitsubishi models).
• The train can still operate with one Motor Alternator running, although at reduced performance.
74
How does a driver rectify a DC supply fault?
• Attempt to reset the DC Supply Circuit Breaker in the leading cab.
• If unsuccessful, reset a DC Supply Circuit Breaker in a trailing motor.
Submit a TMM to the Train Controller
• If no DC breakers can be reset, the train is disabled
75
What type of communication methods can be used during non-electrically coupled train rescue?
• Whistle codes
• DTRS MCN call
• Any other safe form of communication
76
What does an illuminated LINE SWITCH fault light mean?
Illuminates when a fault prevents the line breakers from closing on a motor car.
77
With ROBBDS test, if you have checked Trip, Switches, Gauges and Cocks and don’t resolve the issue, what’s the next step?
Confirm that 110 V DC supply is available
78
What are some ways you can confirm that you have 110 v DC?
• Checking if the DC Supply light is illuminated.
• Observing the “Doors Open” or “Doors Closed” light.
• Verifying the bell operates, the LP flag is lowered, and the EP brake is functional.
79
How do you perform ROBBDS test in detail?
Go down each one
Reverser:
• Place the reverser into REVERSE and try for power.
• If the train powers in reverse but not forward, the reverser is defective in the forward direction.
Traction Overload Reset:
• Press the Traction Overload Reset Button.
• If power is restored, submit a Train Malfunction Message (TMM).
Brake Pipe Reduction:
• Reduce brake pipe pressure below 325 ± 20 kPa to open the Control Governor.
• Recharge to above 430 kPa to close the governor and try for power again.
Control Governor Bypass:
• Apply and isolate the brake, turn the red EC cock across the pipe, and press the Control Governor Bypass Button.
• If power is restored, the fault lies in the Control Governor.
Door Loop Bypass:
• Isolate the Door Loop Bypass key switch using the VICERS key.
• If power is restored, the fault lies in the traction inhibit system. Submit a TMM and de-train passengers.
Second Master Controller:
• Perform the full Cab Unattended Procedure and try for power using a second master controller.
• If power is restored, a Competent Employee must assist in clearing the section.
• If power is still unavailable, declare the train disabled.
80
What are the causes of a loss of brake pipe pressure?
• Brake pipe flexible hose coupling uncoupling or rupturing.
• Activation of trip valves.
• Emergency cock in the van area being opened.
• Emergency application valve operation.
• Train dividing or derailing.
• VICERS system involuntary activation.
• Rupture of brake pipe or related piping.
• Main reservoir pipe or reservoir rupture.
81
How is a brake pipe leak identified?
• Perform a Full Cab Unattended Procedure.
• Observe air pressure on the duplex gauge.
• Walk the train and listen for air escaping.
• Isolate the brake pipe in sections to locate the leak
82
What steps are required to manage a ruptured flexible hose or brake pipe on a leading motor?
• Secure the train using EP brakes or the emergency brake.
• Identify the leak by listening for air escaping.
• Isolate the affected hose or pipe.
• Seal or plug the rupture where possible.
• Submit a TMM to the Train Controller.
• Proceed cautiously if the defect has been isolated.
83
What steps are required to manage a ruptured flexible hose or brake pipe at an intermediate location?
• Secure the train using the EP brake.
• Isolate the defective car from the brake pipe system by closing the Brake Pipe End Cocks on either side of the defect.
• Submit a TMM and operate at reduced speed until repairs are complete.
84
What steps are required to manage a ruptured flexible hose or brake pipe at an intermediate location?
• Secure the train using the EP brake.
• Isolate the defective car from the brake pipe system by closing the Brake Pipe End Cocks on either side of the defect.
• Submit a TMM and operate at reduced speed until repairs are complete.
85
What is back tripping, and how is it rectified?
Back tripping occurs when a trip lever does not fully raise or vibrates into the lowered position, exhausting brake pipe air and applying the emergency brake.
To rectify:
• Identify the defective or lowered trip by visually inspecting the trip-striking lever or latching lever.
• Reset and raise the lowered trip.
86
What steps are taken when a trip activates at a signal?
• Place the brake controller into Emergency.
• Attempt to reset the trip.
• If the trip is reset and the brake pipe recharges, follow applicable rules.
• If the brake pipe does not recharge, isolate the trip causing the issue
87
What steps are taken when a trip activates for no apparent reason (e.g., debris)?
• Place the brake controller into Emergency.
• Assess the area for debris near the track.
• Reset the trip and proceed with Extreme Caution to the next fixed signal
88
How is a defective trip isolated?
• Tie the defective trip lever in the raised position using rope from the train’s tool kit.
• Isolate the Yellow TECHAV Cock in the affected cab.
• Submit a TMM to the Train Controller.
• Proceed with Extreme Caution to the next fixed signal.
89
What steps are taken to reset the VICERS system?
• Ensure the train is stationary.
• Place the Master Controller in “0” (coast).
• Set the brake controller to Emergency and wait for pressure to drop below 25 kPa.
• After 10 seconds, press the VICERS Acknowledgment Button.
• Return the brake controller to Run and Release to recharge the brake pipe.
90
What procedures are followed when the VICERS system activates and cannot be reset?
• Isolate the VICERS Isolation Key Switch.
• Submit a TMM to the Train Controller.
• If the brake pipe continues to exhaust:
• Isolate the Red EC Cock.
• Apply the Automatic Air Brake.
• Press the Control Governor Bypass button as needed.
91
What procedures are followed when the VICERS system activates and cannot be reset?
• Isolate the VICERS Isolation Key Switch.
• Submit a TMM to the Train Controller.
• If the brake pipe continues to exhaust:
• Isolate the Red EC Cock.
• Apply the Automatic Air Brake.
• Press the Control Governor Bypass button as needed.
92
How is the location of a brake pipe leak determined?
• Secure the train using the EP brake.
• Isolate the brake pipe in sections (e.g., trailing or leading units).
• Open the BVICS to check if the brake pipe charges.
• Walk the train, listening for air escaping to pinpoint the leak.
93
How is a defective charging valve identified?
• The brake pipe does not charge when the BVICS is open, and the brake controller is in the RELEASE position.
• No air sound is heard passing through the brake controller.
94
What steps are taken to rectify a defective charging valve?
• Ensure the main reservoir to brake controller isolating cock is open.
• Move the brake controller between RELEASE and EMERGENCY to free the valve.
• If unresolved, charge the brake pipe from a trailing motor and operate at restricted speed
95
What is the function of the Lockout Magnet Valve?
It prevents the Automatic Air Brake from working when the EP Brake or Rheostatic Brake is in use, ensuring only one braking system is active.
96
What is the function of the Lockout Magnet Valve?
It prevents the Automatic Air Brake from working when the EP Brake or Rheostatic Brake is in use, ensuring only one braking system is active.
97
What are the symptoms of a defective Lockout Magnet Valve?
Closed Position: No automatic air brake in the SERVICE zone.
Open Position: Automatic air brake works simultaneously with EP/Rheostatic brake
98
How is a defective Lockout Magnet Valve rectified?
Closed Position: Use the EMERGENCY position to apply the brakes.
Open Position: Trip the EP Brake circuit breaker and use the automatic air brake
99
What is the function of the Emergency Application Valve?
It releases brake pipe air to the atmosphere during an emergency brake application, ensuring the brakes engage immediately.
100
How is a defective Emergency Application Valve identified?
• Emergency brakes do not release.
• The control governor remains open.
• Loss of control voltage to the master controller
101
How is a defective Emergency Application Valve rectified?
• Ensure the Trip and Foot Pilot Valve are in the correct positions.
• If unresolved, declare the train disabled
102
What is the function of the Release Prevention Valve?
• It stops the brakes from releasing when the brake pipe pressure is too low until the auxiliary reservoir pressure drops enough
103
What are the indications of a defective Regulating Valve?
• Brake pipe pressure is outside the normal range (425–550 kPa).
• Erratic movement of the brake controller handle.
104
How is a defective Regulating Valve rectified?
• Adjust or replace the regulating valve.
• Operate the train cautiously if unresolved.
105
What are the symptoms of a defective brake controller handle?
The handle moves on its own, either toward RELEASE or SERVICE positions.
106
What steps are taken to manage a defective brake controller handle?
• Use a secondary brake controller from another cab if necessary.
• Submit a TMM for further investigation
107
What is the purpose of the Train-lined Spring Park Brake?
It secures the train mechanically during a loss of main reservoir pressure.
108
What are the symptoms of a Train-lined Spring Park Brake not releasing?
• The Park Brake Light remains illuminated.
• Brakes fail to release even after the circuit breaker is reset
109
What steps are taken to rectify a Train-lined Spring Park Brake not releasing?
• Check the train-lined park brake isolating cock.
• Reset the park brake circuit breaker
110
What is the procedure for a compressor governor circuit breaker tripping?
• Check for air leaks or faults in the compressor system.
• Reset the circuit breaker
111
What is the procedure if the brake pipe fails to charge?
• Ensure the BVICS is open and the brake controller handle is in RELEASE.
• Check the main reservoir to brake controller isolating cock
112
What speed restrictions apply when operating with a defective charging valve?
• Operate at a maximum speed of 15 km/h if the brake pipe is charged from a trailing motor.
113
What can cause erratic brake cylinder pressure while operating on the EP Brake?
• Defective train cable.
• Faulty brake controller.
• Malfunctioning code conversion unit.
• Mechanical issues with brake rigging.
114
How does a driver deal with ineffective Rheostatic brake performance?
• Use the automatic air brake for the remainder of the journey.
• Submit a Train Malfunction Message (TMM) to Train Control
115
How does a driver deal with ineffective EP Brake performance?
• Isolate the EP Brake system.
• Operate the train using the automatic air brake.
• Submit a TMM to Train Control
116
What are the symptoms of a defective brake unit on a car?
• The train fails to stop as expected.
• Brake cylinder pressure shows 0 kPa.
• Brakes do not apply during a continuity test
117
How does a driver deal with ineffective Automatic Air Brake performance?
• Inspect the train for faults in brake cylinders, rigging, or auxiliary reservoirs.
• Operate using the EP or Rheostatic Brake if available.
• Submit a TMM to Train Control
118
How does a driver identify brake rigging defects?
• Inspect the brake rigging using a Tri-key.
• Look for fouling or physical damage.
• Tie up defective rigging and isolate the affected bogie.
119
What are the causes of a loss of brake pipe pressure?
• Brake pipe flexible hose coupling uncoupling or rupturing.
• Activation of trip valves.
• Opening of the emergency cock in the van area.
• Emergency application valve operation.
• Train dividing or derailing.
• VICERS system involuntary activation.
• Rupture of brake pipe or related piping.
• Main reservoir pipe or reservoir rupture.
120
How is a brake pipe leak identified?
• Perform a Full Cab Unattended Procedure.
• Observe air pressure on the duplex gauge.
• Walk the train, listening for air escaping.
• Isolate the brake pipe in sections to locate the leak
121
What steps are required to manage a ruptured flexible hose or brake pipe on a leading motor?
• Secure the train using EP brakes or the emergency brake.
• Identify the leak by listening for escaping air.
• Isolate the affected hose or pipe.
• Seal or plug the rupture where possible.
• Submit a TMM to Train Control.
• Proceed cautiously if the defect has been isolated.
122
What steps are required to manage a ruptured flexible hose or brake pipe at an intermediate location?
• Secure the train using the EP brake.
• Isolate the defective car by closing the Brake Pipe End Cocks on either side of the fault.
• Submit a TMM and operate at reduced speed until repairs are complete.
123
What is back tripping, and how is it rectified?
• Back Tripping occurs when a trip lever does not fully raise or vibrates back into the lowered position, exhausting brake pipe air.
To rectify:
• Identify the defective or lowered trip.
• Reset and raise the trip lever manually.
124
What steps are taken when a trip activates at a signal?
• Place the brake controller into EMERGENCY.
• Attempt to reset the trip.
• If the trip is reset and the brake pipe recharges, follow applicable rules.
• If the brake pipe does not recharge, identify and isolate the defective trip
125
What steps are taken when a trip activates for no apparent reason (e.g., debris)?
• Place the brake controller into EMERGENCY.
• Inspect the area for debris near the track.
•Reset the trip and proceed with Extreme Caution to the next fixed signal.
126
How is a defective trip isolated?
• Tie the defective trip lever in the raised position using rope or a suitable tool.
• Isolate the Yellow TECHAV Cock in the affected cab.
• Submit a TMM to Train Control.
• Proceed with Extreme Caution to the next fixed signal.
127
What steps are taken to reset the VICERS system?
Ensure the train is stationary.
• Place the Master Controller in “0” (coast).
• Set the brake controller to EMERGENCY and wait for pressure to drop below 25 kPa.
• After 10 seconds, press the VICERS Acknowledgment Button.
• Return the brake controller to Run and Release to recharge the brake pipe.
128
What procedures are followed when the VICERS system activates and cannot be reset?
• Isolate the VICERS Isolation Key Switch.
• Submit a TMM to Train Control.
• If the brake pipe continues to exhaust:
• Isolate the Red EC Cock.
• Apply the Automatic Air Brake.
• Use the Control Governor Bypass Button as needed
129
How is the location of a brake pipe leak determined?
• Secure the train using the EP brake.
• Isolate sections of the train by closing Brake Pipe End Cocks systematically.
• Open the BVICS to test for recharging.
• Walk the train and listen for escaping air to pinpoint the leak.
130
What are the indicators of sticking brakes?
• Smoke or odor from overheated components.
• Retardation of the train.
• Illuminated fault lights.
• Hot or discolored wheels.
131
What is the function of a Dump Valve?
Reduces auxiliary reservoir pressure during emergency brake applications, allowing the brakes to release when the brake pipe is recharged.
132
How does a driver rectify sticking brakes in running?
• Trip the EP Brake Circuit Breaker and apply/release the brake.
• Monitor the train for signs of smoke, odor, or retardation.
133
How does a driver rectify sticking brakes when stationary?
Perform rapid brake applications and releases.
• Inspect the train for smoke, heat, or mechanical issues.
• Isolate the affected bogie if necessary.
134
What does the Panto Isolation Switch isolate?
The Panto Isolation Switch isolates the electric control circuit for the pantograph.
135
What does the Panto Isolation Switch cut off?
It cuts off the control voltage needed to raise or operate the pantograph.
136
Does the Panto Isolation Switch affect the pneumatic system?
No, it does not directly affect the pneumatic system.
