HST

Question 1

What is the maximum line speed for a 2+4 HST?

Answer 1

100mph

Question 2

What is the maximum line speed for a 2+2 HST?

Where linespeed =85mph or less?
Where linespeed = 90mph or more?

Answer 2

A, 60mph
B, 75mph

Question 3

What is the maximum line speed for a 2+3 HST?

Answer 3

100 mph

Question 4

HST - how long after the fire system has activated must you not enter the clean air and engine compartments?

Answer 4

20 minutes

Question 5

You are taking power and your train is travelling at 75mph when a fire is detected in the REAR power car. Which of the following will occur immediately?

A, rear power car engine shuts down
B, Leading power car engine shuts down
C, Ammeter in driving can stops
D, Fire bell rings in driving cab
E, intergen fire suppression system activates in rear power car.

Answer 5

A and D

Question 6

You are taking power and your train is travelling at 75mph when a fire is detected in the LEADING power car. Which of the following will occur immediately?

A, rear power car engine shuts down
B, Leading power car engine shuts down
C, Ammeter in driving can stops
D, Fire bell rings in driving cab
E, intergen fire suppression system activates in rear power car.

Answer 6

B, C & D

Question 7

When will the Inergen fire suppression system activate if a fire is detected in the leading power car?

Answer 7

When the F&R is moved to off

Question 8

Other than the Inergen system fitted to power cars, where else is firefighting equipment found on the class 255?

Answer 8

1, in the driving cab
2, in the Train managers office
3, in vestibule on trailer vehicles.

Question 9

For each of the systems below, what are the normal working air pressures?

Main Reservoir
Main Reservoir pipe
Brake pipe pressure - running release
Brake pipe pressure - full service
Bogie Brake pressure - full service

Answer 9

A, 8.5-10 bar
B, 7 bar
C, 5.1 bar
D, 3.35 bar
E, 4.5 bar

Question 10

True or false: a class 255 fitted with power operated doors can move if the brake is released or power taken while the doors are open or released?

Answer 10

True

Question 11

HST - what is the maximum amount of power you should take when departing a station until the rear power car is clear of the station

Answer 11

Notch 4

Question 12

What horn tone should be used for the following?

A, To give a warning to anyone on or near a running line
B, To give an urgent warning to anyone on or dangerously near to the line
C, when passing a whistle board
D, To give a warning when in a depot or siding
E, To sound a local or special code
F, Wrong direction movements

Answer 12

A, High Loud & Low Loud
B, High Loud
C, Low Loud
D, High Soft
E, High Loud
F, High Loud

Question 13

HST- if the brake pipe has been fully discharged, for how long must it be allowed to charge in order to fully charge the brake distributors on each vehicle?

Answer 13

4 minutes

Question 14

List 3 safety risks that must be considered if entering the engine room compartment whilst the engine is running or being started using the local engine start button?

Answer 14

Hot surfaces
Excessive noise
Slips, trips and falls

Question 15

HST - while at a stand at a booked station stop in which position must the brake controller be placed

Answer 15

Step 2

Question 16

What must be considered/carried out when travelling in the rear cab of a class 255?

Answer 16

1, if fire bell sounds, you must not enter clean air and engine compartment

2, if the rear cab will not be platformed at your destination, you must travel in the train

3, if required to leave the cab in an emergency, you yourself must obtain a line block from the signaller.

Question 17

HST - If the fire system does not activate automatically, it can be activated manually from where?

Answer 17

1, there is a manual activation device on the driving desk
2, there is a manual activation device outside of the power car
3, the system can only be activated from the driving cab with the master switch (F&R) at OFF

Question 18

At what speed above the permitted will ATP warn?

Answer 18

3 mph

Question 19

At what speed above the permitted will ATP intervene?

Answer 19

6 mph

Question 20

When relieving another driver mid-journey, the relieving driver must enter their OTDR number into ATP. What is the first step required to do so.

Answer 20

Pressing the ‘on’ button on the ATP panel.on the driving desk.

Question 21

Once an ATP intervention has occurred and the train speed has been brought under control, what indications will be given by the ATP and what actions must the driver take.?

Answer 21

1, The brakes button on the ATP panel on the driving desk flashes.
2, the driver must press the brakes button on the ATP panel on the driving desk to release the brakes

Question 22

Where can the emergency ladder be found for use in an evacuation scenario?

Answer 22

1, Train Managers office, TGS
2, Bicycle Storage compartment, TGS
3, Power car luggage compartment

Question 23

Where can the Saw, Axe and Sledge hammer be found for use in evacuation scenario?

Answer 23

Train managers office, TGS

Question 24

While driving a class 255 fitted with power operated doors in passenger service, you are brought to a stand by a signal at danger at a platform at which you are not booked to call. What actions must be taken to proceed?

Answer 24

1, The signal must show a proceed aspect
2, The Guard/Train manager must dispatch the train in case the TGS slam door has been opened.

Question 25

In relation to train speed and braking characteristics, what risks are associated with driving multiple/other traction types in addition to class 255? Hie can these risks be mitigated?

Answer 25

Air brakes are different to 800's/150, harder to stop 255 traction. Gets up to speed quickly due to lots of power. Prone to wheelslip/slide Mitigated by - driving to conditions and having earlier braking points. RTC

Question 26

While at speed, the wheelslip light illuminates red with the power handle closed but extinguished when power is applied. What action will you take?

Answer 26

Continue as normal.

Question 27

While at speed, the wheelslip light illuminates red with the power handle is open but extinguished when power is power is shut off. What action will you take?

Answer 27

1, continue as normal 2, take reduced power(wheelslip)

Question 28

While at speed, the wheelslip fault light illuminates red and remains illuminated regardless of the position of the power handle. What IMMEDIATE action will you take?

Answer 28

Stop the train

Question 29

With the engine running and cab active, you press the train supply On button but the indicator doesn't illuminate. List 3 checks/observations that would confirm that the train supply has been established.

Answer 29

1, air con in driving cab 2, battery power voltage 3, 3 phase lights illuminated

Question 30

If train supply has not been established, list 3 possible causes.

Answer 30

1, 3 phase jumper flap open 2, TS off button faulty 3, MCB tripped

Question 31

How many attempts can be made to reset a tripped class 255 MCB on your own authority?

Answer 31

1

Question 32

You are unable to release the parking brake, list 3 possible causes?

Answer 32

1, No/Low air 2, PBCB MCB tripped 3, Parking brake isolated

Question 33

You are unable to fully create the brake pipe pressure list 5 checks you could make to identify the cause?

Answer 33

1, Brake in emergency in rear cab 2, Air Leak 3, Brake test Switch 4, Pass Comms not reset 5, Main Res fully charged

Question 34

With the cab active, you press the start button, but only one engine starts. List 5 possible causes

Answer 34

1, engine isolated 2, low coolant 3, low oil 4, other engine cold 5, low voltage relay

Question 35

You have mobilised the cab and are ready to depart at the start of a journey. On receiving the 'right away' you are unable to take power. List 3 possible causes

Answer 35

1, DRA on 2, Test switch on 3, not got traction interlock.

Question 36

While travelling at speed you experience a loss of power on one of the power cars. List 5 possible causes?

Answer 36

1, Fire system activated 2, High water Tempreature 3, Tripped MCB 4, RFR4 tripped 5, Power earth fault

Question 37

Which of the following are true regarding coupling a failed class 255 to an assisting train. Which are the following are true? 1, emergency drawbars are stored in the TGS 2, the long drawbar is used for coupling a failed class 255 to another assisting class 255 3, emergency drawbars are stored in the power car luggage compartment 4, long drawbar is used for coupling a failed class 255 to.an assisting locomotive 5, all involved should stand well clear during train movements to couple failed to assisting train 6, the drawbars are heavy and require two persons to lift them.

Answer 37

2, 3, 5 and 6

Question 38

While travelling at speed , the engine on a power car shuts down. Give 3 indications that the driver may receive or could check.

Answer 38

1, Engine stop light illuminated 2, fire alarm 3, Low fuel 4, LVR Tripped.

Question 39

If the brake pipe guage in the leading cab displays the following readings. What does this indicate? 1, 0 bar 2, halfway between 3 and 0 bar. Meter reading directly south 3, 3.3 bar

Answer 39

1,emergency brake front cab 2, Pass comm 3, Emergency brake rear cab

Question 40

If the fire system activates in error what actions must be taken if the train is to remain in service

Answer 40

1 the engine on the affected power car must be isolated 2 the fire system on the affected power car must be isolated.

Question 41

Where can the power car MCB panel be found?

Answer 41

Clen air compartment

Question 42

If the ATP is defective it may need to be isolated. What is the method of isolating ATP that will be used first.

Answer 42

Operating the ATP isolation switch on the control cubicle

Question 43

The MTU diagnostic panel gives information in the event of engine fault. Where can this be found?

Answer 43

Luggage van compartment.

Question 44

The egress handle has been opened on a class 255 door. At what speed can the door be opened if the egress is operated a second time?

Answer 44

3 mph

Question 45

If the driver-guard buzzer is defective, what methods of dispatch could be used?

Answer 45

1,use green flag or lamp 2, us the RA when available.

Question 46

What do the following ATP indications stand for? 1,ROL 2,MAX 3,WP? 4,e01 5,BB! 6,OK!

Answer 46

1, Roll away risk 2, Max speed (overspeed) 3, Working pressure 4, Start of self test 5, Brake buttin to start test 6, Ok button to confirm

Question 47

An emergency egress has been operated by a passenger while the train is at speed. What immediate actions will occur?

Answer 47

1, the brake will apply immediately but cab be released if the driver presses the override plunger within 5 seconds. 2, once the driver presses the override plunger, it remains active for 60 seconds

Question 48

As you are starting away from a station stop,you hear the driver-guard buzzer sounding a long continuous note. What action should you take?

Answer 48

Stop the train immediately

Question 49

What are the indications if a class 255 pass comm is operated?

Answer 49

1, The brakes will apply immediately and cannot be overridden 2, a whistle will sound at the activated pass comm.

Question 50

How can electrical safety be ensured before tackling a fire on a trailer vehicle?

Answer 50

Turn off train supply using the isolation switch in the vestibule of the trailer vehicle.

Question 51

While at speed, the locked axle fault light illuminates red. What immediate actions will you take?

Answer 51

Stop the train

Question 52

You are working a class 255 of a depot. Placing the F&R to F or R and taking power immediately causes the engine to shut down, but the engine can be restarted if the F&R is moved back to engine only. What is the most likely cause?

Answer 52

Shore supply is attached somewhere on the train

Question 53

If defective, AWS/TPWS may need to be fully isolated. Where can the AWS/TPWS full.isolation switch be found?

Answer 53

Brake frame 2 in the clean air compartment

Question 54

If defective, the traction interlock system may need to be fully isolated. How is this accomplished?

Answer 54

Operate the TIS on the driving desk

Question 55

Brake application unable to release, what could be the causes?

Answer 55

Parking brake Faulty/missing 36 way jumper Emergency brake rear cab E70 isolated DSD/DVD Pass comm AWS/TPWS Low main air Door interlock - egress CCB circuit breaker

Question 56

Loss of power- unable to obtain power, what're the causes?

Answer 56

DRA Brake test Switch Control cut out Power cut out High Temperatures- water, alternator, rectifier Flagged relays - RFR4, PEFR2 WTR Governor - air brake pipe

Question 57

Engine stopped - unable to start. What are the causes

Answer 57

Shore supply attached Fire system operated Control cut out switch power cut out switch Low fuel Low coolant MCB's - CCB, BCB Local stop button latched in