TSD RTG Observ. Of Signals

Question 1

Bi directional definition

Answer 1

Allowing for normal movement of rail traffic in either direction according to the infrastructure and system of safe working in use

Question 2

Controlled speed

Answer 2

A speed that allows rail traffic to stop short of an obstruction within half the distance of clear line that is visible ahead

Question 3

Railway track signal definition

Answer 3

A device attached to a rail that explodes on impact, used to attract attention of rail traffic crews

Question 4

Restricted speed definition

Answer 4

A speed that allows rail traffic to stop short of an obstruction within half the distance of clear line that is visible ahead, restricted speed must not exceed 25km/h

Question 5

Unidirectional

Answer 5

Allowing for normal travel in one direction only according to the infrastructure and system of safe-working in use

Question 6

Wrong side system failure definition

Answer 6

A failure in the signalling system which causes a potentially dangerous situation to exist.

Question 7

Examples of Wrong side system failure

Answer 7

• rail traffic not detected by the signalling system
• rail traffic is approaching and crossing a level crossing and the flashing lights and/or boom gates fail to operate
• proceed signal is displayed where a stop signal should be displayed

Question 8

What is a running signal?

Answer 8

Signals mainly used to authorise running movements but may also be used for shunting movements

Question 9

Hand, hand held flag and light signals and radio communication are used when:

Answer 9

• an additional signal is required
• necessary to give right away
• an emergency exists

Question 10

Difference between controlled and non-controlled signals

Answer 10

Controlled
- automatically set at stop
- NCO controls/sets

Non-controlled
- automatically set at proceed
- movement of trains controls

Question 11

Rail traffic signals are used to:

Answer 11

• indicate the front and rear of rail traffic (x2 red lights at rear, x2 white lights at front)
• indicate rail traffic is complete

Question 12

Rail traffic can only pass a signal at stop when authorised by:

Answer 12

• NCO or the OIC if the local control panel is in operation

Question 13

Describe Approach side

Answer 13

The worker must be looking in the direction of an able to see the aspect of the signal

Question 14

Departure side

Answer 14

The worker, when looking at the signal can only see the back of it

Question 15

Rightaway signals must be given where:

Answer 15

• Rail traffic is stopped for station duties
• passenger train is stopped at a platform or station