HGV Show Me Tell Me Questions: The Complete 2026 Guide
At the start of your HGV practical driving test, the examiner will ask you vehicle safety questions — commonly known as “show me, tell me” questions. Getting these right sets a confident tone for the rest of your test. This guide covers all the questions you may be asked, with clear answers.
How the Questions Work
The examiner will ask you a combination of:
- “Tell me” questions: You explain how you would carry out a safety check (verbal answer).
- “Show me” questions: You physically demonstrate a safety check on the vehicle.
You will typically be asked 3–5 questions. Getting them wrong will not automatically fail you, but each incorrect answer counts as a minor fault. Too many minors can add up.
The Complete Question List
Tell Me Questions
Q: Tell me how you would check that the brakes are working before starting a journey.
A: Before moving off, press the brake pedal firmly. It should feel firm and not spongy or go to the floor. Start the engine and check the air pressure gauge builds to the correct level. Test the footbrake before moving off — the vehicle should not pull to one side. Also check the parking brake holds the vehicle on a slope.
Q: Tell me how you would check that the power-assisted steering is working before starting a journey.
A: Start the engine and turn the steering wheel. If the steering is heavy or makes unusual noises, the power steering may not be working. You can also check by turning the wheel slightly before starting the engine — there should be slight resistance, which eases when the engine starts.
Q: Tell me how you would check the tyres to ensure they are safe and legal.
A: Check that tyres are correctly inflated to the manufacturer’s recommended pressure. Check the tread depth — the legal minimum for HGV tyres is 1mm across three-quarters of the breadth and around the entire circumference. Check for cuts, bulges, or damage to the sidewalls. Ensure there are no objects embedded in the tread.
Q: Tell me how you would check the condition of the reflectors and lights.
A: Walk around the vehicle checking all lights and reflectors. Switch on the ignition and check headlights (dipped and main beam), sidelights, rear lights, brake lights, indicators, fog lights, and reversing lights. Check that all reflectors are clean, undamaged, and properly fitted. Have someone help you check brake lights if needed.
Q: Tell me how you would check the engine oil level.
A: Park on level ground and wait for the engine to cool. Locate the dipstick, pull it out, and wipe it clean. Reinsert it fully, then pull it out again. The oil level should be between the minimum and maximum marks. If it is low, top up with the correct grade of oil as specified in the vehicle handbook.
Q: Tell me how you would check the coolant level.
A: Check the coolant level in the expansion tank — it should be between the minimum and maximum marks when the engine is cold. Never remove the radiator cap when the engine is hot. If the level is low, top up with the correct coolant mixture as specified in the vehicle handbook.
Show Me Questions
Q: Show me how you would check the air pressure is building correctly.
A: Start the engine and observe the air pressure gauge(s) on the dashboard. The pressure should build steadily. Most vehicles require a minimum of 6–8 bar before the brakes will release. The low air pressure warning light/buzzer should go off once sufficient pressure is reached.
Q: Show me how you would check the horn is working.
A: Press the horn button on the steering wheel. It should produce a clear, audible sound. (Only demonstrate this when it is safe and appropriate to do so.)
Q: Show me how you would check the windscreen washers and wipers are working.
A: Operate the windscreen washer control. Fluid should spray onto the windscreen. Then operate the wipers — they should clear the screen effectively without smearing or juddering. Check that the wiper blades are in good condition.
Tips for the Show Me Tell Me Section
- Practice on the actual vehicle: During your training, ask your instructor to go through all the questions with you on the training vehicle.
- Use your own words: You do not need to recite answers word-for-word. The examiner wants to see that you understand the checks, not that you have memorised a script.
- Stay calm: If you are unsure about a question, take a moment to think. A considered answer is better than a rushed incorrect one.
- Know where things are: Make sure you know the location of the dipstick, coolant reservoir, washer fluid, and all controls on the vehicle you are testing in.
At GS Driver Training, we cover all show me tell me questions thoroughly during your practical training. Our instructors ensure you are confident with every check before your test day.
Ready to start your HGV training? Call us on 01252 447808 or view our courses.