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Signals > Three Position Signals > Flashcards

Three Position Signals Flashcards

1
Q

Type

A

Light only

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2
Q

Class (4)

A

Home
Dwarf
Auto
Repeating

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3
Q

What is the purpose of automatic signals?

A

To expedite the passage of trains by dividing long sections of track into shorter sections

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4
Q

What are repeating signals used for?

A

Gives warning of a three position signal when leaving a two position area

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5
Q

How do you know a signal is not in use?

A

Notified via WON
signals will be bagged
Dwarf and disc will have black cross

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6
Q

3 pos home sigs are fixed at and protect…?

A

Stations
Sidings
Sig boxes
Level crossings
Junctions

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7
Q

Home and autos can display what colours?

A

Red
Green
Yellow

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8
Q

Dwarf sigs can display what colours?

A

Red
Green
Yellow
Blue
Purple

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9
Q

If a home or auto has a marker light as the lower light, what aspects can it display?

A

Normal or stop

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10
Q

If a home or auto has a marker light as the top light, what aspects can it display?

A

Medium or stop

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11
Q

Clear normal speed

A

Points set
Track clear
Track speed
Next sig proceed

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12
Q

Normal speed warning

A

Points set
Track clear
Track speed
Next sig is stop

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13
Q

Reduce to medium

A

Points set
Track clear
Track speed but need to be 40 by next sig
Next sig a medium aspect

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14
Q

Clear medium speed

A

Points set
Track clear
Max 40
Next sig at proceed

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15
Q

In ATC on a clear medium speed or clear low speed when can you speed up? And what sigs will give you these?

A

When the whole train has cleared the points
Get it on a HD or a dwarf into a single line section

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16
Q

Medium speed warning

A

Points set
Track clear
Max 40
Next sig at stop

17
Q

On ATC with a medium speed warning, when can you speed up?

A

When you get to the next fixed sig

18
Q

Stop on dwarf and home or auto

A

Points unknown
Track May be occupied
Must not proceed
Next sig unknown

19
Q

Low speed caution

A

Points set
Track may be occupied
Max 15
Prepare to stop

20
Q

What does an illuminated 65 or 80 mean?

A

High speed points

21
Q

What does an illuminated letter A indicate to a driver? And what sig aspect will it be displayed with?

A

The sig is now in automatic mode
Displayed only when sig is at stop

22
Q

Clear low speed

A

Points set
Track clear
Max 15
Next sig proceed

23
Q

What aspects can a 3 pos dwarf display?

A

Stop
Low speed caution
Clear low speed

24
Q

What is the purpose of a banner indicator?

A

Indicates what the sig ahead is when there is not a clear view

25
Q

On a banner indicator what colours do the vertical, horizontal and diagonal lines represent?

A

V- green
H- red
D- yellow

Signals (12 decks)

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