Train Prep & Safety Apparatus

Question 1

What are the different kind of Train Preps?

Answer 1

Post Maintenance
Mainline Prep
Revenue Prep
Pre-movement Prep

Question 2

When is a Post Maintenance Prep done?

Answer 2

After full maintenance exam
After repairs following collision
After safety critical equip. repair or brake failure repairs

Question 3

When is a Mainline Prep done?

Answer 3

Prior to train entering mainline or revenue service for the first time that day

Question 4

When is a Revenue Prep done?

Answer 4

When train has received Post Maint. or Mainline prep earlier that day and it is returning to service

Question 5

When is a Pre-movement Prep done?

Answer 5

When train is being moved within a workshop/yard/siding

(Same as Revenue Prep but Trip isn’t included)

Question 6

What does the ‘safety apparatus’ on the train consist of? (8)

Answer 6

Hand operated pilot valve
Foot operated pilot valve
Emergency application valve
Emergency pilot valve
Control governor bypass circuit
Control governor
Trip apparatus
VICERS Equipment

Question 7

When does the Emergency Application Valve activate?

Answer 7

When pressure on the pilot valve (hand or foot) is released

Question 8

What pressure in the BP does the control governor cut power to the master controller?

Answer 8

310-340 kPa

Question 9

What pressure in the BP will the control governor restore power to the master controller again?

Answer 9

400-430 kPa

Question 10

What pressure is main res. air at when BP is fully charged at 550kPa?

Answer 10

Main res. air is between 585-725kPa

Question 11

How do you do a EP Brake Test?

Answer 11

BCH to RUNNING and RELEASE
- observe BC pressure red. to 0

Ensure BP (550)and Main res. (725)
at operating pressure and EP CB is set

Increase BCH through each step,
pausing in each step to check
BC and BP pressure remain
constant

Decrease BCH through each step
pausing in each step to check
BC and BP pressure remains
constant

Move BCH to RUNNING and RELEASE and observe BC
pressure reduces to 0kPa

Question 12

As you move the BCH through each braking step what are you testing?

Answer 12

That the A, B and C wires are functioning correctly

Question 13

How do you do a Automatic Air Brake Test?

Answer 13

Ensure BP fully charged and no audible air flow from Charging valve

Move BCH to Step 2 and trip the EP CB
- Low pressure flag rises
- BP pressure down, BC
pressure up

Move BCH through to FULL SERVICE
- BP pressure down,
- BC pressure up

Return BCH to MINIMUM REDUCTION. Leave for 10 seconds, observe:
- no reduction in BC and no rise
in BP

Move BCH to EMERGENCY and observe BP pressure deplete rapidly to 0kPa

Return BCH to RUNNING and RELEASE and observe no audible air flow
- BP pressure up to operating
pressure
- BC pressure depletes to 0kPa

Reset the EP CB and observe low pressure flag lowers

Place BCH to STEP 7 EP

Question 14

How do you do the Hand Pilot valve and Control Governor test?

Answer 14

Insert controller key into Reverser and unlock

Depress MCH and move Reverser to FORWARD

Remove hand from MCH and observe BP pressure reduce rapidly

When BP pressure falls below 290kPA depress MCH and move to NOTCH 1
- Observe Ammeter does not register
any current - confirming Control
Governor is OPEN

As BP pressure rises, observe Ammeter registers current when Control Governor closes, then immediately shut off power by moving the MCH to OFF

Question 15

How do yo do the Foot Pilot valve and Control Governor test?

Answer 15

Depress Foot Pilot valve to SET, noting indicator on fault panel illuminated

Release Hand pilot valve and observe BP pressure remains constant

Depress Foot Pilot valve to NOT SET position, observe BP pressure reduces rapidly and Foot Pilot valve indicator light extinguishes

Return Foot Pilot valve to SET and observe BP pressure rising

Remove Foot completely from Foot Pilot valve and observe BP pressure reduce rapidly

Return foot pilot valve to the SET position and observe BP pressure rises to operating pressure

Question 16

How do you do the VICERS test?

Answer 16

Turn the key switch momentarily to TEST and release to initiate an automatic self-test sequence.

Observe:
Acknowledgement button flash
Audible buzzer
Vigilance fault indicator illuminates, then extinguishes
Auto test involves:
The VAV relays twice in quick succession
- monitor BP pressure change
VAV releases until BP pressure drops to the point Control Governor opens
VAV will then re-energise allowing pressure to rise and Control Governor to close
Check of task linking between driver controls and VM40

Question 17

How do you do the Trip Apparatus test?

Answer 17

Head lights on HIGH BEAM

Marker lights to WHITE

Exit cab through B side door with switch stick

Inspect front of train for high and low beam lights, white marker lights, headboard operational

Strike the trip mechanism with switch stick

Observe BP pressure in van area and duplex gauge reducing below 150kPa

Switch off headlights

Marker lights to AUTO

BCH to EMERGENCY and drain BP to 0kPa

BCH to RUN and RELEASE - charge BP

BCH to STEP 7 EP