Part B

Question 1

1. Types of fixed signals

Three position signals are automatic and are always colour light signals - they indicate….

Answer 1

Permissible speed

Give advance information about the next signal ahead

Question 2

2.Classes of fixed signals operating in our area.
I
O
D
D
H
S

Answer 2

Intermediate
Outer home
Directing 
Departure 
Home
Shunting

Question 3

3.Define

Home signals

Answer 3

A home signal is provided to authorise entry to a station

Question 4

4. Define

Outer home signals

Answer 4

Is a fixed signal located (when provided) between the home signal and the intermediate signal

Question 5

5.Define

Shunting signals

Answer 5

Control the passage of trains and shunting movements within station limits

Question 6

6.Define

Departure signals

Answer 6

Control entry to a block section where movements are signalled in both directions

Question 7

7.Define

Directing signals

Answer 7

Are used in station yards for the purpose of directing trains to various platforms, siding or positions to which the signals apply, and for protecting the lines to which they apply

Note : all automatic running signals to enter and move within station limits are equipped with a low speed light. Ie home outer home and directing

Question 8

8.Define

Intermediate signals

Answer 8

Provided where necessary in block sections to divide the block section in to smaller sections, the entrance to which is controlled by an intermediate signal

Question 9

9.Define

Station limits

Answer 9

Includes all lines within the outer most signals, station entry boards or points on each line controlled by the signaller for the station or as otherwise defined on S&I diagrams

Question 10

Define

Banner indicators

Answer 10

Supply information about the next signal in advance when there is restricted sighting distance on this signal

Question 11

What do Colour light shunting signals do?

Answer 11

Control the passage of trains and shunting movements within station limits

Question 12

10. What are the three types of colour light shunt signals?

Answer 12

Two position colour light shunting signal

Three position colour light shunting signal

Yellow light low speed signals on a fixed signal mast

Question 13

11. What does a shunting limit board define?

Answer 13

Mark the limits for shunting purposes in accordance with detail defined on S&I diagrams or local instructions

Question 14

What is the object of automatic signalling?

Answer 14

To facilitate the regular movements of trains by

Dividing the line into sections
Controls the movement of trains in to such sections using fixed signals
Sections provide a safe distance between following trains
Axle counters or track circuits hold signals at stop when trains enter
Protects opposing trains in single line

Question 15

12.Double unit signals

Double unit signals with two multi aspect or two searchlight units are provided as follows:

Answer 15

Where one or more lines diverge from the main line
At junctions
At locations where a reduction to intermediate or medium speed is required
At locations approaching a signal which may require a reduction to intermediate or medium speed

Question 16

Finish the sentence

Colour light signals not in use…..

Answer 16

Must have the light units covered, or turned away at right angles to the track so that no confusion can arise

Question 17

The units which display the coloured lights which, in combination with one another , give the indications of automatic running signals are :
Multi aspect which have coloured lights, searchlight units , marker lights and…..

Answer 17

Low speed lights which display a short range steady yellow light when at proceed but normally do not show any light. The lamps of low-speed lights are backed by a triangular metal plate painted white with a yellow border

Question 18

14. What needs to occur at an ATSB?

Answer 18

All rail movements must stop before the board unless permission to pass has been received from the person responsible for movements

Question 19

15. All signals must be complied with….

Answer 19

Unless it is likely to lead to danger or in the case of a fixed signal displaying a proceed indication it is obvious the route has been incorrectly set