Cab Equipment and Circuit Breakers

Question 1

Positions of a master selector switch

Answer 1

• reverse
• neutral
• forward
• Set speed

Question 2

Neutral is used for? (3)

Answer 2

• stopped at a signal
• cab unattended
• any time a cab is to be deactivated

Question 3

When will the over speed system apply emergency brakes?

Answer 3

Speed over 125km

Question 4

What does set speed do? And when does the overspeed activate?

Answer 4

Limits the train to 6km and over speed activates at 8km

Question 5

What are the 7 circuit breakers and can they be bypassed? CATSFED or FACES TD

Answer 5

1. Cab manned - cannot bypass
2. Train stable - cannot bypass
3. Safety loop - cannot bypass
4. Emy brake valves - cannot bypass
5. Door control train line (doors open) - cannot bypass
6. Friction brake monitoring - yes bypass
7. Auto coupler in centre cab - yes bypass

Question 6

What type of brake does emergency use?

Answer 6

Friction brake only

Question 7

When does the holding brake automatically apply?

Answer 7

Speed below 0.2km or in coast

Question 8

Holding brake cylinder pressure?

Answer 8

110kpa

Question 9

Full service/B6 pressure?

Answer 9

189

Question 10

Emy brake cylinder pressure?

Answer 10

280kpa

Question 11

What happens when a DDA request button is pushed? (2)

Answer 11

• button flashes 5 times
• cctv will turn on when you press it

Question 12

What speed does the over speed indicator lamp illuminate?

Answer 12

Over 119km

Question 13

The auto door close inhibit overrides which doors?
Key in or out when you press it?

Answer 13

1 and 4
Key in

Question 14

When does the uncouple button flash? And is it in all cabs?

Answer 14

Low main res pressure (below 850) in all cabs

Question 15

Key switch on or off to stable the train?

Answer 15

Off

Question 16

How often does the MAD button sound

Answer 16

30 sec

Question 17

When would a critical fault light illuminate? (3)

Answer 17

• major failure of friction brakes
• both SIV failed
• wheel slip fault affecting the sanders

Question 18

What does the traction system fault light tell you (2)

Answer 18

• The traction system on the local motor has a serious defect
• the train stable, HSCB or light control MCB has tripped

Question 19

When you bypass the safety loop and trip cock, what button do you need to continue to press?

Answer 19

MAD button

Question 20

Where are the MCBs and fault panel in a trailer car?

Answer 20

RH side door 2 at no 2 end

Question 21

Does the cab speaker turn on automatically when a PEI is activated?

Answer 21

Yes

Question 22

What does the compressor fault light tell you?

Answer 22

Air pressure has dropped below pressure switch setting and has not recovered to normal MR settings

Question 23

Is Panto control MCB local or train lined?

Answer 23

Train lined

Question 24

Is Panto motor MCB local or train lined?

Answer 24

Local

Question 25

What circuit breakers are behind the fire extinguisher?

Answer 25

- GPO - Trip

Question 26

What does the trip cock device do?

Answer 26

Prevents the trip from lowering when cab is deactivated

Question 27

The safety systems isolation fault light will illuminate when what has been operated? (3)

Answer 27

- door loop bypass - safety loop bypass - trip cock bypass

Question 28

Safety equipment (6)

Answer 28

FAK ATWS ETCJC Red and green flags Fire extinguisher Switch stick

Question 29

When does the holding brake release?

Answer 29

- When enough traction power has been detected to accelerate the train - in B1 - B6

Question 30

The vigilance control system comprises of…? (5)

Answer 30

- task linking - acknowledgement button - audible buzzer - fault indicator - activation valve or relay

Question 31

What does the general fault indicator flashing red mean?

Answer 31

There is a fault on the train

Question 32

In centre cabs, what does it mean when the uncouple button is illuminated red?

Answer 32

The trains are coupled

Question 33

When does the trip lower?

Answer 33

When the cab is activated

Question 34

What does the electric brake inhibit button do?

Answer 34

Temporarily disables ED braking and enables EP

Question 35

Which circuit breakers could cause a critical defect fault light to illuminate?

Answer 35

- friction brake monitoring in M and T - SIV monitoring MCB in T car

Question 36

What happens when the traction control unit MCB trips? And what fault lights?

Answer 36

- traction power for the local unit is not available - reduced performance and maintenance fault in any cab - Traction system fault in affected motor

Question 37

Fault lights on T car fault panel? (10)

Answer 37

- Breaks bogie 1 & 2 - HVAC 1 & 2 - SIV 1&2 - brakes cut out bogie 1&2 - park brake bogie 1&2

Question 38

Train lined fault lights? (6)

Answer 38

- safety loop - critical defect - maintence fault - reduced performance - door system - compressor fault