Northern Rail Conductor > Signalling - Absolute Block > Flashcards

Signalling - Absolute Block Flashcards

(74 cards)

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1
Q

What is the purpose of signalling? (5)

A

To prevent conflicting movements
To regulate speed
To increase line occupancy
To indicate change of direction
For shunting

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2
Q

What is the overall principle of each signalling system?

A

One train in one section at one time

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3
Q

How might a conductor be involved in a SPAD?

A

SAS SPAD

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4
Q

What type of signals are primarily found in AB areas?

A

Semaphores

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5
Q

What is the name of this signal?
What aspect is it showing?
What does it mean?

A

Semaphore Distant - caution
Caution be prepared to stop at next stop signal or any other stop signals controlled by the same signal box in that direction

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6
Q

What is the name of this signal?
What aspect is it showing?
What does it mean?

A

Semaphore Distant - proceed
All associated stop signals controlled by the same box are in the clear position

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7
Q

What is the name of this signal?
What aspect is it showing?
What does it mean?

A

Semaphore Stop - Danger
Danger - stop
(AKA Home OR Section signal)

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8
Q

What is the name of this signal?
What aspect is it showing?
What does it mean?

A

Semaphore Stop - Proceed
Clear - proceed

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9
Q

Stop Semaphore signals can show lights in darkness/poor visibility. What colours are these lights and in which aspects will they be displayed?

A

RED In the horizontal (danger) position
GREEN In the 45 degree (proceed) position

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10
Q

Distant Semaphore signals can show lights in darkness/poor visibility. What colours are these lights and in which aspects will they be displayed?

A

YELLOW In the horizontal (caution) position
GREEN In the 45 degree (proceed) position

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11
Q

In AB, what is the track divided into?

A

Block Sections

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12
Q

Block Section - Signal Order
1. Stop signal at the start of the block section is called the…

A

Section Signal

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13
Q

Block Section - Signal Order
2. __________ in the middle ____(does what?)_______

A

Distant signal in the middle instructs the driver how to proceed towards the Home Signal

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14
Q

Block Section - Signal Order
3. Stop signal at the end of the block section is called the…

A

Home Signal

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15
Q

Block Section - Signal Order
4. Distant signals are positioned in the block sections at appropriate places for the driver to be able to slow down, this is known as the ______________________

A

Service Braking Distance

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16
Q

Can a distant signal show a stop aspect?

A

No

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17
Q

Name the covered signal?

A

Distant

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18
Q

Name both covered signals?

A

Pink - Home
Green - Section

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19
Q

What is covered?

A

Absolute Block Section

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20
Q

What is covered?

A

Station limits

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21
Q

What is covered?

A

400m clearing point

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22
Q

What is covered?

A

Service Braking Distance

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23
Q

What is the service braking distance?

A

The distance it takes for the driver to stop the train

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24
Q

What is a clearing point?

A

A 400 metre safety buffer placed beyond every Home signal. The train must pass the clearing point before another train is authorised to enter the block section.

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25
What is the purpose of a clearing point?
To prevent collisions and preserve the principle of one train in one section at one time
26
What are the station limits?
The area between the Home and the Section signals controlled by that Signal Box
27
Where does an intermediate block section run from and to?
From the section signal (box in the rear) to the intermediate block home signal
28
How are Intermediate Block Home Signals identified?
White plate with a black vertical line
29
How are Intermediate Block Distant Signals identified?
Black plate with a white triangle
30
How can you identify the back of a semaphore signal?
Painted black and white
31
Why can signals only be operated in the correct sequence?
They're interlocked
32
After which signals are Clearing Points incorporated?
Home Signals
33
What piece of equipment do signallers use to communicate?
Block Instruments
34
Name all eight signals shown in this diagram in order
Distant, Home, Section IBD, IBH Distant, Home, Section
35
Name all five sections shown in this diagram in order
ABS, Station Limits, IBS, ABS, Station Limits
36
What does the signage on this signal mean?
The presence of the train is indicated to the signaller by a track circuit
37
What does the signage on this signal mean?
Signal is equipped with a telephone
38
What does the signage on this signal mean?
Signal is equipped with a telephone
39
What is the name of this signal?
Fixed Distant Signal
40
In which two locations will this signal be positioned? (2)
Locations where 1. The next signal will always be at danger OR 2. The speed of the train will need to be reduced
41
A fixed distant signal always displays what aspect?
Caution
42
Fixed distant signals are found on approaches to... (5)
Dead end stations Loops Sidings Level Crossings Single Lines
43
The signal ID plate indicates a distant signal by either a white triangle or what?
The letter R (R stands for repeater as it is repeating the state of the next signal ahead)
44
What will you always find associated with a subsidiary signal?
The main arm of a semaphore stop signal
45
(Not the main signal) What is the name of this signal? What does it mean? What does this position mean?
Subsidiary signal Means obey the main arm This position means Danger - Stop
46
(Not the main signal) What is the name of this signal? What does it mean? What does this position mean?
Subsidiary signal Means pass the main arm at danger Proceed at caution towards the next train, signal or buffer stop and be prepared to stop short of any obstruction
47
Subsidiary signals can have a 'C' or 'S'. What does a 'C' stand for and what does it mean?
Calling On Proceed at caution as the line ahead is occupied
48
Subsidiary signals can have a 'C' or 'S'. What does a 'S' stand for and what does it mean?
Shunt Proceed at caution to carry out only the shunt movement
49
What is the name of this signal? What aspect is it showing?
Shunting Disc Stop
50
What is the name of this signal? What aspect is it showing?
Shunting Disc Proceed at caution as far as the line ahead is clear
51
Shunting discs can display coloured lights in darkness or poor visibility. What colours might be displayed?
Red bar horizontal - Red light Red bar raised 45 degrees - green light
52
What is the purpose of shunt discs?
Shunt signals are used to control movements from one running line to another or inside sidings and depots
53
A route can have diverging routes (routes that go off from the main one). _________ are used to show which route has been set.
Route indicators
54
Where multiple routes (and therefore multiple route indications) exist, signals are organised by _________ or __________
Stepping or stacking
55
Which route would the black signal take you to?
1L
56
Which route would the red signal take you to?
2L
57
Which route would the yellow signal take you to?
3L
58
Which route would the green signal take you to?
1R
59
Which route would the blue signal take you to?
2R
60
Which route would the brown signal take you to?
3R
61
The highest signal in a set of stepped signals relates to what?
The main line
62
Which number is the main line? Would signal 2 take you left or right?
3 Left
63
Which number is the main line? Would signal 2 take you left or right?
1 Right
64
How do we remember the best way to read stepping signals?
High to low
65
Which route would the black signal take you to?
1L
66
Which route would the orange signal take you to?
2L
67
Which route would the blue signal take you to?
3L
68
Which route would the red signal take you to?
1R
69
Which route would the pink signal take you to?
2R
70
Which route would the grey signal take you to?
3R
71
The highest signal in a set of stacked signals relates to what?
The furthest left line
72
Lower signals in a set of stacked signals relate to what?
Progressive routes to the right
73
How do we remember the best way to read stepping signals?
Top to bottom, left to right
74
What is permissive working?
Permissive working refers to more than one train allowed to occupy the same line in a block section, signal section, or dead-end platform line.
Northern Rail Conductor
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