Element 4 Semaphore Signalling Questions

Question 1

What are the four types of Semaphore signals

Answer 1

Stop signals, Distant signals, Subsidiary Signals and Shunting signals

Question 2

What does a Semaphore Stop signal look like?

Answer 2

Red Arm with White Vertical Stripe.

Question 3

During daylight what is the “Off” indication of a Semaphore Stop signal?

Answer 3

Signal Arm raised to an angle of 45 degrees.

Question 4

During darkness what indications does a Semaphore Stop signal show?

Answer 4

Red for Stop

Green for Proceed

Question 5

If you observe a signal which is not shown or imperfectly shown what must you assume that the signal is showing?

Answer 5

A Stop Aspect.

Question 6

What does a Semaphore Distant signal look like?

Answer 6

Yellow Fishtail Arm with a Black Chevron.

Question 7

During daylight what is the “Clear” indication of a Distant Semaphore signal?

Answer 7

Signal Arm raised to an angle of 45 degrees.

Question 8

During daylight what is the “Caution” indication of a Distant Semaphore signal?

Answer 8

Signal Arm maintained in a Horizontal position.

Question 9

During darkness what are “Clear” and “Caution” indications of a Semaphore Distant signal?

Answer 9

Green light for “Clear”

Yellow light for “Caution”

Question 10

If you observe a Distant signal which is not shown or imperfectly shown what must you assume that the signal is showing

Answer 10

A Caution Aspect.

Question 11

What does a Semaphore Subsidiary signal look like?

Answer 11

Small Red Semaphore Arm with a White Horizontal Stripe, or a small Semaphore stops signal.

Question 12

Where is a Semaphore Subsidiary signal normally placed?

Answer 12

Below the Main Stop signal.

Question 13

During daylight when a Semaphore Subsidiary signal is cleared what is the indication?

Answer 13

The Signal Arm raised at 45 degrees.

Question 14

During darkness what are the “Stop” and “Proceed” indications of a Semaphore Subsidiary signal?

Answer 14

Red light for “Stop”

Green light for “Proceed”

Question 15

What does the clearing of a Semaphore Subsidiary signal indicate?

Answer 15

Proceed past the Main Stop signal for shunting purposes, being prepared to stop short of any obstructions, or at the next Stop signal.

Question 16

What does a Semaphore Shunting signal look like?

Answer 16

A White Disk with a Red Horizontal Bar, or a short red arm on a post.

Question 17

During daylight what is the Proceed indication of Semaphore Shunting signal?

Answer 17

Disk (including Red Horizontal Bar) at an angle of 45 degrees, or arm raised at 45 degrees.

Question 18

During darkness what are the “Stop” and “Proceed” indications of a Semaphore Shunting signal?

Answer 18

Red light for “Stop”

Green light for “Proceed.

Question 19

How would you identify an Intermediate Block signal?

Answer 19

A White Signal Post Plate with a Black Vertical Stripe.

Question 20

In an Absolute Block Signalling area whom controls an Intermediate Block Home signal?

Answer 20

The Signal Box in rear.

Question 21

In an Absolute Block Signalling area what is meant by the term Intermediate Block Section?

Answer 21

The Intermediate Block Section is the portion of line between the Section Signal and the Intermediate Block Signal controlled by the same signal box.

Question 22

In an Absolute Block Signalling area what is meant by the term Braking Distance?

Answer 22

The Braking Distance is the line between the Distant Signal and the Home (Stop) Signal belonging to the same signal box.

Question 23

In an Absolute Block Signalling area what is meant by the term Station Limits?

Answer 23

Station Limits is the portion of line between the Home Signal and the Section Signal controlled by the same signal box.

Question 24

In an Absolute Block Signalling area what is meant by the term Block Section?

Answer 24

The Block Section is the portion of line between the Section Signal of the Signal Box in rear to the Home Signal of the signal box in advance.