LGV Braking Systems 2

Question 1

What is the correct procedure if the low air pressure warning activates while driving?

Accepted Answer

Stop as soon as safely possible, do not continue driving until the fault is identified and fixed

Answer

Pump the brake pedal rapidly to build up pressure

Answer

Continue driving slowly

Answer

Turn off the warning light and continue

Question 2

What is anti-compound on a braking system?

Accepted Answer

A mechanism that prevents the service brake and spring brake from being applied simultaneously on the same wheel

Answer

A cleaning fluid for brake components

Answer

A type of brake pad material

Answer

An anti-rust coating on brake drums

Question 3

What should a driver check regarding brakes during a daily walkaround?

Accepted Answer

Air pressure build-up rate, warning devices, air leaks (listen), brake hose condition, and brake disc/drum condition

Answer

Nothing — brakes are only checked during annual tests

Answer

Only the colour of the brake fluid

Answer

Only whether the brake pedal moves

Question 4

What is the purpose of the trailer emergency line (red coupling)?

Accepted Answer

To automatically apply the trailer brakes if the trailer separates from the tractor unit

Answer

To supply electrical power to the trailer

Answer

To supply air for the trailer air suspension

Answer

To provide heating to the trailer

Question 5

What is brake hysteresis?

Accepted Answer

The difference between braking force during application and release — important for smooth, controlled braking

Answer

The sound brakes make when applied

Answer

A type of brake disc

Answer

The time taken to replace brake pads

Question 6

Why might brakes pull to one side during braking?

Accepted Answer

Uneven brake adjustment, a seized caliper, or different brake pad materials on opposite sides can cause uneven braking

Answer

This is normal behaviour for all HGVs

Answer

Because the steering wheel is on the right

Answer

This only happens in wet weather