Signals COPY

Question 1

What are the 6 classes of 2 position signals?

Answer 1

1. Home
2. Dwarf
3. Disc
4. Distant
5. Siding Dwarf
6. Calling on

Question 2

What are the 2 main purposes of signal systems?

Answer 2

1. Communicate to the driver the state of the line ahead
2. Give the driver authority to proceed

Question 3

What are the two types of two position signals?

Answer 3

1. Light Type
2. Disc Type

Question 4

What signal is both a class and a type?

Answer 4

Disc Signal

Question 5

What do two position Home signals protect (and positioned at)?

Answer 5

Stations
Signal Boxes
Sidings
Level Crossings
Junctions

Question 6

What two aspects can the two position Home system show?

Answer 6

Red - Stop
Green - Proceed

Question 7

When a two position home signal is showing proceed, are the points set and the line clear ahead?

Answer 7

Yes the points and line are clear.

Question 8

What does a proceed aspect on a two position home signal not show?

Answer 8

Does not indicate if next signal is at proceed.
Driver should be prepared to stop at next signal and assume it’s at stop.

Question 9

What 2 aspects do distant signals display?

Answer 9

1. Caution
2. Proceed

Question 10

Why would a distant signal be at caution?

Answer 10

1. A train is in the section
2. An obstruction on the line
3. A signal in the block is at danger

Question 11

When coming across a distant signal at caution, can it tell you which signal is at stop?

Answer 11

No, it only indicates that a signal in the block is at stop

Question 12

What does a call on signal mean?

Answer 12

A train can enter into an occupied section, past the stop aspect.

Question 13

How would a driver pass a calling on signal showing proceed?

Answer 13

Advance cautiously past the signal and be able to stop short of any obstruction

Question 14

If the home signal is clear (green) AND bottom light is on, can you proceed?

Answer 14

No, it would be treated as an irregular signal aspect. Treat as both signals are at their safest aspect.

Question 15

What are disc signals used to control? (train movements)

Answer 15

1. Running line to running line
2. Running line to siding
3. Siding to siding
4. Siding to running line

Question 16

What 2 aspects do disc signals display?

Answer 16

Stop and Proceed

Question 17

What does a disc signal tell us? (PTSN)

Answer 17

P - Points are set
T - Track ahead may be occupied
S - Speed is reduced speed cautiously
N - Next signal is unknown so be prepared to stop

Question 18

When a disc signal is at proceed, what must you be aware of?

Answer 18

The line may be occupied or obstructed

Question 19

What is the max speed at a siding?

Answer 19

15km/h

Question 20

What is the max speed at points? (running line to running line)

Answer 20

40km/h

Question 21

How can a disc signal show an aspect at night?

Answer 21

It has a red or green light depending on if it reads stop or proceed

Question 22

How do you read a set of 4 disc signals on one post?

Answer 22

Top to bottom, left to right
1-3
2-4

Question 23

What does a two position dwarf signal control?

Answer 23

1. Running line to running line
2. Running line to siding
3. Siding to siding
4. Siding to running line

Question 24

What are the two different types of two position dwarf signals?

Answer 24

Standard 2 position dwarf signal
And a siding Dwarf (fitted on same past as home signal)

Question 25

What aspects can a dwarf signal display?

Answer 25

Stop - Red/Blue/Purple Proceed - Green or Yellow (for a siding dwarf)

Question 26

How can a siding dwarf and a call on signal be distinguished?

Answer 26

Call on is just the light Siding dwarf has the light AND a siding sign

Question 27

If a two position dwarf signal is at proceed, is the line clear?

Answer 27

No, the track ahead may be occupied

Question 28

What happens when a track circuit is broken?

Answer 28

The signal reverts to it's fail safe aspect (stop)

Question 29

What are 3 things that can break a tracks circuit?

Answer 29

1. Damaged track 2. Obstructed track 3. Occupied by another train

Question 30

How does an axle counter work?

Answer 30

It counts how many axles enter a block and makes sure it matches with how many axles leave the block. It feeds this information to the signals to show the block is occupied or clear.

Question 31

What light colours can be shown by a 3 position signals?

Answer 31

Red - stop/reference light Yellow - warning Green - clear

Question 32

What information can a 3 position signals provide?

Answer 32

Points - set or not set Track section ahead - clear or occupied Speed - normal/medium track speed Next Signal - whether next signal aspect is proceed or stop

Question 33

What is the top light (A light) referring to in a 3 position signal set?

Answer 33

The A light refers to normal speed

Question 34

What is the bottom light (B light) referring to in a 3 position signal set?

Answer 34

Medium speed aspect

Question 35

What signal class can have a C Light or Low speed aspect?

Answer 35

Home signal

Question 36

How can you tell a home signal and an automatic signal apart?

Answer 36

Home has two lights vertically Automatic has the two lights staggered

Question 37

What are the three classes of 3 position signals?

Answer 37

Home Automatic Dwarf

Question 38

Why is it important to know the difference between the classes of signals?

Answer 38

Rules and instructions vary depending on class and location of signal

Question 39

Where are 3 position signals fixed at and protecting?

Answer 39

Stations Signal boxes Sidings Level crossings Junctions

Question 40

Which classes of 3 position signal is usually controlled?

Answer 40

Home signals and Dwarf signals

Question 41

If you need to pass a home signal that is uncontrolled, who would you contact for permission?

Answer 41

Signaller/Area Controller (Signal Control Panel)

Question 42

What is the primary purpose of automatic signals?

Answer 42

Expedite the passage of trains by dividing long sections of track into shorter sections.

Question 43

Can automatic signals at stop be passed?

Answer 43

Yes, only if you follow Rule 1, Section 3

Question 44

Which signals are classified as absolute or permissive?

Answer 44

Absolute - Home, Dwarf, Disc Permissive - Automatic

Question 45

How many aspects can a 3 position signal show?

Answer 45

6 with A & B lights 7 with A, B & C lights (only on home)

Question 46

What aspect is this signal showing?

Answer 46

Clear Normal Speed

Question 47

For a Clear Normal Speed aspect, what does the signal tell us? (PTSN)

Answer 47

P - Points are set T - Track is clear S - Speed is track speed N - Next signal will show proceed

Question 48

What aspect is shown on this signal?

Answer 48

Normal Speed Warning

Question 49

What does a Normal Speed Warning tell us? (PTSN)

Answer 49

P - Points are set T - Track is clear S - Speed is track speed, but prepare to stop at next signal N - Next signal will be at stop

Question 50

This signal is Reduce to Medium, what speed is medium?

Answer 50

40km/h

Question 51

What does a reduce to medium signal tell us? (PTSN)

Answer 51

P - Points are set T - Track is clear (till next signal) S - Track speed but prepare to reduce to medium by next signal N - Next signal will be at medium aspect

Question 52

What does a Red A light over a Green B light signify? (Name + PTSN)

Answer 52

Clear Medium Speed P - Points are set T - Track is clear S - Speed is medium (40km/h) N - Next signal will be a proceed

Question 53

What is the name of this aspect and what does it tell us? (PTSN)

Answer 53

Medium Speed Warning P - Points are set T - Track is clear S - Speed is medium (40km/h), prepare to stop before next signal N - Next signal is at stop

Question 54

What do 2 red lights on a signal mean?

Answer 54

Stop! Points may not be set, track may be occupied.

Question 55

When stopped at danger aspect, what should you do with your reverser?

Answer 55

Set to neutral or off Marker lights to white

Question 56

What is the name of this aspect and it's PTSN?

Answer 56

Low Speed Caution P - Points are set T - Track ahead may be occupied S - Speed is low speed 15km/h, be ready to stop short of any obstruction N - Don't know next signal aspect, assume next one is at safest position

Question 57

What 2 locations can a low speed signal take you to?

Answer 57

1. A siding 2. Main line track/running line to running line (eg. to a station to couple with another train)

Question 58

When can a Low Speed Caution never be used?

Answer 58

For train movements into a bi-directional portion of track

Question 59

What signal aspects come before a stop aspect?

Answer 59

Reduce to Medium (sometimes) then Normal Speed Warning or Medium Speed Warning

Question 60

What does an illuminated 65 or 80 mean on a home or automatic signal?

Answer 60

High speed points ahead, reduce to 65 or 80 based on what is shown.

Question 61

What does an illuminated red A on a 3 position home signal mean?

Answer 61

Home signal has been switched to automatic as is to be treated as an automatic signal (only visible on a signal at stop)

Question 62

If a signaller is operating points and signals, the signal box is referred to as?

Answer 62

Switched In

Question 63

If the signaller is off duty, what is the signal box referred to as?

Answer 63

Switched out

Question 64

When the signal box is switched out and running by the passage of trains, what is the mode called?

Answer 64

Fleeting Mode

Question 65

What 3 aspects does a three position dwarf show?

Answer 65

Stop Low speed caution Clear low speed

Question 66

What is the primary purpose of Banner Indicators?

Answer 66

They indicate the aspect of the signal ahead when a clear view of the signal cannot be obtained

Question 67

Banner Indicators are not....?

Answer 67

They are not: Fixed signals Considered to be signals in advance

Question 68

What signal is being repeated on the Banner Indicator when it shows 2 horizontal lines?

Answer 68

Stop

Question 69

What aspect is shown on the Banner Indicator?

Answer 69

Normal Speed Warning

Question 70

What signal is the Banner Indicator showing?

Answer 70

Reduce to medium

Question 71

What aspect is the Banner Indicator showing?

Answer 71

Stop

Question 72

Who do you report a faulty Banner Indicator to?

Answer 72

Train Control @ Metrol