ADI Vehicle Safety & Mechanics 3

Question 1

How do you check engine oil level correctly?

Accepted Answer

Check on a level surface with the engine cold or cooled for at least 5 minutes after stopping

Answer

Engine oil must be checked on a level surface with the engine switched off and cooled; checking immediately after use gives a false low reading as oil has not yet returned to the sump.

Question 2

What does traction control (TC) do when a driven wheel begins to spin?

Accepted Answer

It reduces engine power or applies the brake to the spinning wheel to regain traction

Answer

Traction control reduces wheelspin by cutting engine power or applying individual brakes to the spinning wheel, restoring traction especially on slippery surfaces.

Question 3

What is the purpose of the vehicle's spare wheel or tyre repair kit, and what should an ADI advise learners?

Accepted Answer

To provide temporary mobility after a puncture — limitations apply and the full-size spare or puncture must be professionally repaired promptly

Answer

Space-saver spares have speed and distance restrictions; repair kits are effective only for small punctures; in both cases the tyre should be professionally inspected and replaced as soon as possible.

Question 4

Brake fade occurs when:

Accepted Answer

Repeated or prolonged hard braking causes overheating, reducing braking effectiveness

Answer

Brake fade results from heat generated by sustained or repeated heavy braking; it vaporises the brake fluid or glazes the pads, significantly reducing the braking force.

Question 5

Which dashboard symbol indicates the engine coolant temperature is dangerously high?

Accepted Answer

Red thermometer symbol or needle in the red zone

Answer

A red temperature warning (thermometer in red) indicates the coolant temperature has reached a dangerous level; continued driving risks serious engine damage and the vehicle should be stopped safely.

UK ADI Theory Practice Test

UK ADI Theory Practice Test

ADI Vehicle Safety & Mechanics 3