Driving Theory Test

Safety and Your Vehicle

15 free practice questions with explanations

PassNova has 15 free Driving Theory Test practice questions on Safety and Your Vehicle, each with a clear explanation. Practise them in the browser with instant feedback — 100% free, no sign-up, on any device. Updated for 2026.

Sample questions

Safety and Your Vehicle: example questions & answers

15 worked examples with answers and explanations below. Practise them in the browser with instant feedback on every answer.

  1. What is the legal minimum tread depth for car tyres in the UK?

    • A1.6mm across the central 3/4 of the tread width
    • B0.8mm
    • C2.5mm
    • D3mm

    Answer: The legal minimum is 1.6mm across the central 3/4 of the tread width. Below this depth, tyres lose grip in wet conditions significantly, increasing braking distance and skidding risk.

  2. How often should you check your tyre pressure?

    • ANever—modern tyres hold their pressure permanently and need no checking
    • BOnly after a puncture, since pressure cannot fall in an undamaged tyre
    • CMonthly and before long journeys
    • DOnce a year

    Answer: Monthly checks and pre-journey checks ensure optimal grip and handling. Incorrect pressure affects fuel economy, tyre wear, and safety, so regular monitoring is essential.

  3. What does low tyre pressure cause?

    • ANo effect on safety, because the tread does all the work of gripping
    • BIncreased fuel consumption and poor handling
    • CBetter fuel economy
    • DIncreased grip on the road

    Answer: Low pressure increases tyre flexing, which generates heat, increases fuel consumption, and reduces handling precision. It also increases the risk of a blowout on long journeys.

  4. When must your vehicle have a valid MOT?

    • AFrom 1 year old
    • BFrom 3 years old
    • CAt 2 years old
    • DOnly when the vehicle fails a roadside check

    Answer: An MOT is required from the vehicle's 3rd birthday and annually thereafter. It checks roadworthiness including brakes, emissions, and safety equipment.

  5. What should you do before each journey to ensure your vehicle is safe?

    • ACheck the POWDERS (petrol, oil, water, tyres, engine, lights, mirrors, seatbelts)
    • BNothing—if the car starts, it's fine
    • CJust check the fuel gauge
    • DCheck only the windscreen wipers

    Answer: The POWDERS check (petrol, oil, water, tyres, mirrors, seatbelts, lights, engine) covers essential safety items. A working car is not necessarily a safe car—all these systems must function properly.

  6. What is the effect of worn brake pads on your vehicle?

    • AIncreased stopping distance and risk of brake failure
    • BReduced braking distance
    • CBraking is unaffected
    • DIncreased braking power

    Answer: Worn pads reduce friction, requiring more time and distance to stop. They also increase the risk of brake fluid boiling and complete brake failure, making them a serious safety hazard.

  7. How should you check your vehicle's lights are working?

    • ASwitch them on and walk around to check or use a reflective surface
    • BAsk another driver at the next junction whether they can see your lights
    • CDon't check—they either work or don't
    • DDrive at night and judge from how well the road ahead is lit up in front

    Answer: Walking around your vehicle or using a reflective surface to check lights is the proper method. This ensures all lights work before driving, preventing legal penalties and accidents.

  8. What do brake fluid warning lights indicate?

    • ALow brake fluid or a brake system fault
    • BThat the vehicle is due for its annual MOT test
    • CA minor matter
    • DLow fuel

    Answer: A brake warning light means low brake fluid or a system fault. You should stop safely and not continue driving as brakes may fail, which is extremely dangerous.

  9. Why must you wear a seatbelt in a modern car?

    • AThe law requires it
    • BIt reduces injury in a crash by 40-50%
    • CIt reduces fuel consumption
    • DBoth A and B

    Answer: Seatbelts are legally required and they're proven to significantly reduce injury and death in crashes. They prevent you hitting the windscreen or being thrown from the car.

  10. What should you do if you notice your steering is unusually heavy or loose?

    • ADrive faster, because extra speed loads the steering and settles it down
    • BStop and check fluid levels and alignment immediately
    • CContinue driving to your destination and see whether the steering settles down
    • DIgnore it, as heavy steering is normal until the power steering fluid warms up

    Answer: Heavy or loose steering indicates a serious fault (low fluid, damage, misalignment). You must stop safely and have it checked professionally before driving further.

  11. What is the purpose of the anti-lock braking system (ABS)?

    • ATo prevent wheel lock and skidding during emergency braking
    • BTo reduce fuel consumption
    • CTo shorten your overall stopping distance on every road surface
    • DTo improve acceleration

    Answer: ABS prevents wheels from locking during hard braking, maintaining steering control and reducing skidding. This allows you to steer around obstacles during emergency stops, which is impossible with locked wheels.

  12. How should you drive if you notice your engine temperature gauge rising dangerously?

    • AStop safely as soon as possible and let the engine cool
    • BSpeed up to cool the engine
    • CKeep driving to your destination with the air conditioning switched off
    • DContinue to your destination and book the vehicle in for a service afterwards

    Answer: A rising temperature indicates overheating and risk of engine damage or failure. You must stop immediately to allow the engine to cool and investigate the problem.

  13. What is the legal minimum insurance requirement for a vehicle in the UK?

    • ANo insurance required
    • BFully comprehensive
    • CThird Party
    • DThird Party Fire and Theft

    Answer: Third Party is the legal minimum as it covers damage to other vehicles and property. Comprehensive insurance is optional but recommended for additional protection.

  14. Why should windscreen wipers be in good condition?

    • ATo keep the windscreen washer bottle from freezing up in cold weather
    • BTo remove rain and improve visibility
    • CThey are of little importance to the driver
    • DTo improve the appearance of the car when it is parked

    Answer: Proper wipers clear rain and debris from your windscreen, maintaining visibility in poor weather. Worn wipers leave streaks and cause you to miss hazards.

  15. What should you do if your vehicle breaks down on a motorway?

    • ATry to repair it yourself immediately
    • BPut on hazard lights and get out of the vehicle to stay safe
    • CStay in the vehicle with doors locked
    • DPut on hazard lights, turn off the engine, move passengers to a safe place away from traffic

    Answer: Hazard lights warn others, turning off the engine prevents fire risk, and moving away from traffic to a safe place is essential. Staying in or near the vehicle puts you at risk of being hit by passing traffic.

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