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Comeng Traction > Comeng- Underframe And Brakes > Flashcards

Comeng- Underframe And Brakes Flashcards

1
Q

What does the Primary safety equipment consist of? (TECHAV)

A

-Trip
-Emergency Application Valve
-Control governor
-Hand pilot valve
-Anti-neutralisation device
-VICERS Activation valve

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2
Q

What must be done when driving with the Red EC cock isolated?
(Secondary circuit)

A

-Foot pilot valve must be used
-Control Governor By-Pass button activated
-VICERS must be isolated

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3
Q

What is the function of the Yellow TECHAV cock?

A

To isolate the safety apparatus on a trailing motor should it become defective

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4
Q

Can a driver uncouple a train with the ripcord?

A

No, only maintenance staff can

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5
Q

What are the positions of the couple indicator?

A

Inline= coupled
Diagonal= uncoupled

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6
Q

Beneath the rubber cover on a coupler is a selection lever (for non-electrical coupling)
Under normal operation, which side does it point towards?

A

A side

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7
Q

What are the two isolating cocks on the coupler?

A

B side= Main reservoir IC
A side= Brake pipe IC

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8
Q

Out of the main reservoir hose and brake pipe hose, which is larger in diameter?

A

Brake pipe is larger than

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9
Q

How many trumpets does the whistle have?

A

Three

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10
Q

What is a transition coupler for?
Can we use it?
What is it locked with?

A

Used for attaching to locomotives

We cannot use it, only maintenance can

5P padlock

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11
Q

What is an equalising reservoir?

A

Forms part of the Brake Controller equipment
Allows the Brake pipe to be charged

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12
Q

What does the Pantograph storage reservoir do?

A

Supplies air to raise the pantograph (that car only) when no Main Res air is available

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13
Q

Where does the air for the Trip latching lever come from?

A

Control reservoir

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14
Q

What does a Compressor Governor Isolating Cock do?

A

Isolates the main reservoir air supply to the Compressor Governor
Used when it becomes defective

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15
Q

What does the Control Reservoir Out isolating cock do?

A

Isolates the flow of air from the control reservoir to the electro-pneumatic valves in the main equipment case and line breaker case

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16
Q

What does the Pantograph Interlock switch do? (On the elec equip case)
Can we operate it?

A

Isolates main reservoir air to the pantograph, causing it to lower on that motor

Cannot operate it

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17
Q

What does the Auxiliary Isolating Switch do? (On the elec equip case)
Can we operate it?

A

Isolates the 1500v DC power supply to the motor alternator and air compressor. Pantograph interlock must be isolated first

Cannot operate it

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18
Q

What does the Bogie #2 Brake Isolating cock do?

A

Isolates air pressure from the Brake unit to the brake cylinders of the #2 bogie
Also releases any pressure-existing air pressure in the brake cylinders to atmosphere releasing the brake on that bogie (self-venting)

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19
Q

What are the electrical cables between a motor car and trailer car?

A

Two outer cables= 415v AC
Centre cable= 110v DC
Lower cable (square plug)= CCTV and PEI

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20
Q

What does a Motor alternator run on?
What does it supply?

A

Runs on 1500v DC

Supplies 415V AC

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21
Q

What is powered by the 415v AC?

A

-Saloon lighting
-Headlights
-Air conditioners
-Traction cooling fan

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22
Q

What does the Dryer and Filter do?

A

Removes moisture and contaminates from the compressed air system

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23
Q

What does the Auxiliary Reservoir do?

A

Stores compressed air to feed into the Brake Cylinders while Automatic Air Braking

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24
Q

Where is the #1 Air suspension system isolating cock located?
(Motor car)

A

Above and between the #7 and #8 wheels

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25
Q

What are the three extra reservoirs on a Knorr? (APES)

A

Auxiliary reservoir
Pre control reservoir
EP reservoir
Supplementary reservoir

26
Q

Can a Motor Alternator be reset right away?

A

No, wait until it winds down, otherwise it will overspeed

27
Q

What are the three types of braking systems on a Comeng?

A

-Rheostatic brake
-Electro-pneumatic brake (EP)
-Automatic Air brake

28
Q

On the EP brake, are step 1 and step 2 combined?
What is the braking pressure?

A

They are combined, to equal 70kPa

29
Q

What is the Brake Pipe operating pressure?

A

550 kPa

30
Q

What is the Brake Pipe minimum reduction?

A

50kPa

31
Q

What is Brake Pipe FULL SERVICE reduction?

A

380-410 kPa

32
Q

What is the KpA for EP step 7?

A

250kPa

33
Q

What is the KpA for Emergency?
Tread brake and disc brake

A

Tread brake= 275kPa
Disc brake= 265kPa

34
Q

Can the Automatic air brake and EP brake be in operation at the same time?

A

No, one or the other
Air brake when loss of overhead, or magnet lockout valve and ball check valve is de-energised

35
Q

What is the kPa of the Brake Pipe at FULL-SERVICE zone?

A

Both Westcode and Knorr=
380 to 410kPa (20kPa variance)

36
Q

What happens when the brake handle is put into EMERGENCY?

A

The Charging Valve will CLOSE

The Emergency valve will OPEN

37
Q

Is there wheel slide protection on a Westcode on the air brake?

A

No

38
Q

What are the components of the Brake Controller? (6)

A

-Release Prevention Valve
-Regulating Valve
-Relay Valve
-Charging Valve
-Lock Out Magnet Valve and Ball Check Valve
-Emergency Exhaust Valve
-Equalising Reservoir

39
Q

What does the Release Prevention valve do?

A

Prevents Main reservoir air flow to the regulating valve. Ensures air brake is only released in ‘run and release’

40
Q

What does the Regulating valve do?

A

Reduces main reservoir air pressure to control pressure

Will maintain the Brake Pipe pressure at 550kPa when the EP brake is in use

41
Q

What does the Relay Valve do?

A

Controls the flow of air into and out of the brake pipe

42
Q

What does the Charging valve do?

A

Allows main reservoir air to flow to the relay valve to charge the brake pipe

Remains OPEN in all positions of the brake handle, except EMERGENCY

43
Q

What does the Lock Out Magnet Valve and Ball Check Valve do?

A

When energised, it prevents the Automatic Air Brake from being used
Power is governed by the EP brake circuit breaker (110v DC)

44
Q

What does the Emergency Exhaust Valve do?

A

Vents air directly to atmosphere when and emergency brake application is made

45
Q

When the Emergency Exhaust Valve is OPENED (emergency brake) what valve closes?

A

The charging valve
To allow for rapid and complete exhaustion of the Brake Pipe

46
Q

What does the Equalising Reservoir do?

A

Aids in smoother operation of the relay valve when exhausting brake pipe air

47
Q

What does the BVICS control the flow of air to?
(Brake Valve Isolating Cock and Switch)

A

-Main reservoir air to the automatic air brake valves in the brake controller
-Electrical current to the EP and rheostatic brake selector switches in the brake controller
-Electrical current to the low-pressure flag and lock-out magnet valve
-Electrical current to the door monitoring circuits for the blue door lights

48
Q

What are the components of the Brake Unit? (9)

A

-Variable load valve
-Restricted application limiting valve and ball check valve
-Seven step relay valve
-Restricted application magnet valve (motor only)
-Triple valve
-Release ensuring valve
-Bypass check valve
-Hand release valve
-Dump valve

49
Q

What are the operating parameters of the piston collar on a Westcode bogie?

A

30-65mm

50
Q

What does the variable load valve do?

A

Monitors air pressure in the air suspension system
Depending on the load, brake cylinder pressure will be adjusted so braking remains consistent

51
Q

What does the Restricted Application Limiting Valve and Ball Check Valve do?

A

Allows for a 10% increase in brake cylinder pressure when using Air Brake (above what is available for EP brake)

52
Q

What does the Seven Step Relay Valve do?

A

Converts the electrical code signals from the brake controller (ABC) into seven equal steps of air pressure during EP braking

53
Q

What does the Triple valve do?

A

Controls the flow of air from the:
-Brake pipe to aux reservoir to prepare for brake application
-Aux reservoir to brake cylinders to apple the brakes
-Brake cylinders to atmosphere to release the brake

(Charge, apply, release)

54
Q

On a Knorr, is their wheel slip protection on all positions if the automatic air brake? (Including emergency)

A

Yes

55
Q

At what speed does the Rheostatic braking start becoming ineffective?

A

Below 10kmh

56
Q

At what speed does the Rheostatic braking operate?

A

5-115kmh

57
Q

At what speeds does brake blending occur?

A

Between 5-10 km

58
Q

What is the holding pressure for both Westcodes and Knorr?
What does it do?

A

Westcode= 35 kPa

Knorr= 0 kPa

Small amount of pressure in brake cylinders to hold brake blocks against wheels

59
Q

What brake is available during a power failure?

A

Automatic air brake

60
Q

Once in emergency, can it be placed into another position while moving?

A

No, the train must be brought to a stand first

61
Q

When put into emergency, what valve gives and extra 10% braking force?

A

The Restricted application limiting valve and ball check valve

62
Q

Van area cocks?

A

Panto EP isolate
MA EP isolate
Trip gear isolate
BP sensor isolate
Panto & MA isolate
EP MR isolate

(Puppies make the best pets ever)

Comeng Traction (3 decks)

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