Cancelling and Trains Incorrectly Described

Question 1

If a train isn’t going to proceed and cancelling needs to be sent, what are the two positions that the block indicator for the advance Signal Box can be in, and what must you do with your signals before cancelling can be sent? (2) TS3-3.3.1

Answer 1

Line Clear or Train on Line.
Relevant signals must be replaced to danger before cancelling is sent.

Question 2

If you receive cancelling, what must you do? (2) TS3-3.3.1

Answer 2

Acknowledge 3-5.
Place block indicator to normal.

Question 3

When the signal is locked by the block, what are the three occasions that you must send cancelling before being able to send is line clear again? (3) TS1-6.1

Answer 3

You have not cleared the section signal before the block indicator has been placed to train on line.
You have placed the section signal to danger after the train has stopped, to allow you to work points on the approach side of the signal for shunting purposes.
You have replaced the section to danger before a train has passed it (either by mistake or in an emergency).In which case, you must not send cancelling until the train has stopped.

Question 4

If a train has entered the absolute block section, can you cancel the train? (1)

Answer 4

No

Question 5

What is the bellcode for train incorrectly described? (1) TS1-2

Answer 5

5-3 (with call attention)

Question 6

If you have sent an incorrect is line clear bellcode, which has been acknowledged, how do send the correct is line clear? (1) TS3-3.3.2

Answer 6

1 > 1 .
5-3 > 5-3 .
1 > 1 .
correct is line clear > correct is line clear.

Question 7

If you receive train incorrectly described, what do you do with your block indicator once you’ve acknowledged the correct is line clear bellcode? (1) TS3-3.3.2

Answer 7

Nothing; leave the block indicator as it is.