UK PCV Theory Braking Systems and Technique Questions and Answers

Question 1

You are driving a coach down a long, steep hill. To control your speed and prevent the service brakes from overheating, what is the most effective technique?

Accepted Answer

Select a low gear and make use of the engine brake or retarder.

Answer

Ride the footbrake lightly to maintain a constant speed.

Answer

Apply the parking brake intermittently to assist the service brakes.

Answer

Select a high gear to allow the engine to run freely.

Question 2

What is the primary purpose of an Anti-Lock Braking System (ABS) on a PCV?

Accepted Answer

To allow the driver to maintain steering control during emergency braking.

Answer

To reduce the overall stopping distance in all weather conditions.

Answer

To automatically apply the brakes if a hazard is detected.

Answer

To prevent the service brakes from wearing out prematurely.

Question 3

Which of the following describes how an exhaust brake works to slow a vehicle?

Accepted Answer

It restricts the flow of gases leaving the engine's cylinders.

Answer

It uses electromagnetic resistance on the driveshaft.

Answer

It reverses the flow of hydraulic fluid in the transmission.

Answer

It applies light pressure to the service brakes automatically.

Question 4

A warning light on your dashboard indicates low air pressure in the braking system. You have stopped the vehicle safely. What is the most appropriate action to take?

Accepted Answer

Secure the vehicle with the parking brake and investigate the cause, seeking assistance if necessary.

Answer

Continue the journey at a reduced speed, braking gently.

Answer

Pump the brake pedal several times to try and build up pressure.

Answer

Switch the engine off and on again to see if the warning light resets.

Question 5

The term 'brake fade' refers to a reduction in braking efficiency. What is the most common cause of this phenomenon?

Accepted Answer

Excessive heat build-up in the braking components from prolonged use.

Answer

The brake fluid becoming too cold in winter weather.

Answer

Moisture getting onto the brake discs during wet weather.

Answer

A fault within the Anti-Lock Braking System (ABS) computer.

Question 6

During your daily walk-around check, which of the following is a key inspection related to the air braking system?

Accepted Answer

Listening for any audible air leaks from pipes and reservoirs.

Answer

Checking that the tyre pressures are correct for the load.

Answer

Ensuring the steering wheel has no excessive play.

Answer

Confirming that all passenger seatbelts are in good working order.