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Signaller assessment practice questions and answers

By Signaller Tests · Updated · 15 min read

Below are fourteen free practice questions in the style applicants describe from the signaller online assessment, each with the answer and the reasoning behind it. They are original questions — the real assessment's contents are not published — and they are taken straight from our practice sections. Try each one before you open the answer.

Two of the exercises cannot be shown as written questions because they happen in real time: the multi-tasking exercise and the memory grid. You can try the multi-tasking exercise free and the memory grid free in your browser.

Job simulation scenarios

Multiple-choice workplace scenarios. The safety-led answer usually wins, but not every question is about stopping trains — some reward keeping the railway running once it is safe, and some are about honesty or communication. If a railway term is unfamiliar, see signalling terms explained.

Question 1. A member of the public rings the box to say they have seen someone walking along the track about half a mile from your signal. They sound certain but they cannot tell you exactly where. Two trains are approaching the area.

What do you do first?

  1. Ask the caller to stay on the line and describe the location precisely before acting
  2. Ring your supervisor and ask what they want you to do
  3. Stop the approaching trains, then work out exactly where the person is
  4. Let the trains run and warn the drivers to keep a sharp lookout
Show the answer

C: Stop the approaching trains, then work out exactly where the person is. Stop first, establish the detail second. A report of a person on the line is acted on as true until it is proved otherwise, because the cost of being wrong in one direction is a fatality and in the other is a few minutes of delay. Everything else — pinning down the location, telling the supervisor, warning drivers — happens after the trains are stopped, not instead of it.

Question 2. You give a safety-critical instruction to a driver over the radio. They acknowledge with “yes, okay” and nothing more.

Is that acceptable?

  1. Yes, provided you repeat the instruction once more yourself
  2. No — but only if the instruction was a complicated one
  3. No — ask them to repeat the instruction back to you in full
  4. Yes — they have acknowledged the message
Show the answer

C: No — ask them to repeat the instruction back to you in full. An acknowledgement proves they heard a noise; a repeat-back proves they heard the message. The whole point of the protocol is to catch the case where the driver heard something different from what you said, and “yes, okay” cannot do that. It applies to short instructions as much as long ones.

Question 3. A track worker in charge of a site has given up their line blockage properly. They have confirmed everyone and all equipment is clear of the line, and you have repeated it back and recorded it. Several trains are waiting.

What should you do now?

  1. Return the line to normal use and start moving the waiting trains
  2. Ask the track worker to ring back in five minutes and confirm again
  3. Send the first train through at caution
  4. Hold the trains for ten minutes in case anyone is still on the line
Show the answer

A: Return the line to normal use and start moving the waiting trains. The check has already been done, properly, by the person responsible for it. Repeating it with delays, caution or a second call adds no safety — it just teaches everyone that the formal confirmation cannot be trusted, which undermines the process that actually keeps people safe. Once the handback is complete, the job is to run the railway.

Question 4. You make a mistake that causes a train to be delayed but does not put anyone in danger. Nobody has noticed.

What should you do?

  1. Report it yourself
  2. Mention it informally to a colleague but not officially
  3. Report it only if someone asks about the delay
  4. Say nothing
Show the answer

A: Report it yourself. An error reported is a weakness found; an error buried is the same weakness waiting for a worse outcome. Self-reporting a harmless error is also what makes it credible when you report a serious one — and an industry that only hears about the mistakes it catches is an industry learning from a biased sample.

Question 5. A person in charge of work asks you to grant a blockage on a line while their team is already standing on it.

How should you handle this?

  1. Refuse until they have all walked back off the line, then grant it
  2. Grant it and mention the order they did things in some time later
  3. Protect the line at once, then report that they went on without protection
  4. Grant it through the normal exchange, and say nothing more about it
Show the answer

C: Protect the line at once, then report that they went on without protection. People are on a line that is not protected, right now, so the first move is to make sure no train can reach them — the one thing only the signaller can do instantly. Going on the line before protection is in place is a serious breach, so it is reported rather than quietly absorbed. Refusing until they walk off leaves them exposed for longer, and granting it with nothing said hides the breach from the people who need to know about it.

Question 6. Cattle are reported on the line following a fence collapse. The farmer tells you they will have them off within ten minutes.

How should you respond?

  1. Run trains normally, as the farmer says the animals are already being dealt with
  2. Run trains normally and deal with the fence once the farmer has finished
  3. Stop or caution trains over that stretch until the line is confirmed clear
  4. Wait the ten minutes the farmer asked for and then resume normal working
Show the answer

C: Stop or caution trains over that stretch until the line is confirmed clear. Large animals on the line can derail a train, so until the line is confirmed clear, trains over that stretch are either stopped or cautioned to run at a speed at which the driver can stop short of anything in the way. The farmer's estimate is a promise, not a report that the line is clear. Every other option lets trains run at normal speed on the strength of that promise.

Question 7. During flooding, a driver reports water covering the rails at a low point on the route.

What is the correct approach?

  1. Allow trains through at low speed, leaving the depth to each driver's own judgement
  2. Close the route entirely for twenty-four hours to let the water drain away
  3. Allow trains through and keep monitoring whether the water level is still rising
  4. Stop trains over that stretch and have the depth measured before any train runs
Show the answer

D: Stop trains over that stretch and have the depth measured before any train runs. Water over the rail can be hiding washed-out ballast, and depth judged from a moving cab is a guess. Someone measures it. Closing for a fixed twenty-four hours goes the other way — it is a decision made to avoid deciding, rather than one based on what is actually there.

Question 8. A frustrated member of the public calling from a user-worked crossing phone insists on speaking to 'someone in charge' and refuses to answer your questions about which crossing they are at.

What is the best way to handle this?

  1. End the call, since they are refusing to cooperate with your questions
  2. Give them permission to cross so that they will calm down
  3. Transfer them to your manager so they are speaking to someone in charge
  4. Stay calm, explain you can help and need the crossing name first
Show the answer

D: Stay calm, explain you can help and need the crossing name first. For someone at that crossing, the signaller is the person who can help, and nothing can safely happen until you know which crossing they are at. Calm, clear explanation is the tool. Transferring them adds delay, ending the call leaves someone at a crossing without guidance, and granting permission to placate them is dangerous.

Concentration and pattern checking

Deciding quickly whether a figure meets a rule. On the day, the difficulty is doing this many times in a row without the standard slipping.

Question 9. Which of these clusters of dots forms the letter E?

1234
  1. 1
  2. 2
  3. 3
  4. 4
Show the answer

B: 2. 2 is the only full E — three complete bars with the upright joining them on the left. 1 is an E with a short middle bar, 3 is L, 4 is U.

Question 10. Which shape below is the same as the target? It may have been turned, but it has not been flipped over.

TARGETABCD
  1. A
  2. B
  3. C
  4. D
Show the answer

D: D. D is the target turned on the spot. A is its mirror image — the same outline reversed, which you cannot get to by turning the page. The others differ in the length of at least one side.

Question 11. How many of these 6 clusters form the letter E?

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
Show the answer

A: 1. 1 of the 6 are complete Es: three full bars joined by an upright down the left. The other 5 are near misses — T, a reversed E, P, an E with a short top bar, an E missing its top bar.

Behaviour questionnaire

The real questionnaire has no right answers — you answer as yourself. These practice items instead test whether you understand what a statement is asking about and how answers fit together, which is the useful preparation.

Question 12. A candidate answers “strongly agree” to: “I find it hard to leave a job unfinished at the end of my shift.”

What is an assessor most likely to take from that in a 24-hour shift-based safety role?

  1. Poor planning, since a well-organised signaller would not leave work outstanding at the end of a turn
  2. Nothing much either way, as the statement does not map onto any of the eight non-technical skills
  3. Strong conscientiousness, which is straightforwardly what a safety-critical role is looking for
  4. Strong conscientiousness, but a possible risk around handovers and staying beyond safe hours
Show the answer

D: Strong conscientiousness, but a possible risk around handovers and staying beyond safe hours. Signalling runs continuously and every shift ends mid-something. The trait is a genuine positive and the extreme of it is not: handing over cleanly and going home is part of the job, and fatigue is a managed safety risk. This is the clearest example of why answering at the extreme to look keen backfires.

Question 13. A candidate strongly agrees with: “I always follow a procedure exactly, even when I can see a quicker way.”

Which later statement would most clearly contradict that?

  1. “If a rule is slowing everyone down, I will usually find a sensible way round it.”
  2. “I prefer to have my work planned out before I make a start on it.”
  3. “I find it easy to concentrate on one thing for long periods at a time.”
  4. “I get on well with most of the colleagues I have worked alongside over the years.”
Show the answer

A: “If a rule is slowing everyone down, I will usually find a sensible way round it.”. The two statements make opposite claims about the same behaviour — what you do when the rule is inconvenient. The other three are about unrelated traits and could sit alongside either answer without tension.

Question 14. A questionnaire statement reads:

“I make sure the person I am speaking to has understood me before I move on.”

Which of the eight non-technical skills is this statement most likely reading?

  1. Communications
  2. Decision making
  3. Willingness and ability to learn
  4. Attention management
Show the answer

A: Communications. Confirming receipt is the core of safety-critical communication and it is exactly what the repeat-back protocol formalises. It is a communication item even though it also looks conscientious.

What next

If the scenarios were the hardest part, read how to read the job simulation scenarios. For a structured way to prepare in the time you have, see the one-week preparation plan.

Frequently asked questions

Are these the real signaller assessment questions?

No. The contents of the assessment are not published. These are original practice questions written to reflect the format applicants describe, and this site is not affiliated with Network Rail.

Is the safety-first answer always right in signaller scenarios?

It is the best single rule, but not always. Over-reacting also scores badly, so some scenarios reward getting the railway running again once the proper checks have been done.

Can you practise the multi-tasking test?

Yes. It runs in real time rather than as written questions, and you can try a free version of it in your browser on this site.

Ready to try it?

Start with the free test, then try free demos of every exercise. Unlock the full question banks only if you want more.

Try a free signaller test →All free exercisesSee pricing

Related guides

Signaller job simulation: how to answer the scenarios

Network Rail signaller assessment: every stage explained

Signalling terms explained: a plain-English glossary

How to prepare for the signaller assessment in a week

Free practice for all five signaller assessment exercises →  ·  All signaller guides