Revision question · Braking systems

On an air-assisted hydraulic system, which air-supply fault could explain a pedal becoming unusually hard to press?

Revision material from the imported DVSA bank includes source-checked Lanekind learning corrections. These corrections are not newly issued official examination questions, and practice does not reproduce a live test paper.

Answer options

The brake system has a loss of air pressure

The brake linings are worn

The brake shoes need adjusting

The brake system requires more fluid

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The brake system has a loss of air pressureThis was the right answer

Low air pressure can impair the hydraulic booster’s assistance and increase pedal effort. Leaks, supply and control faults need proper diagnosis. Stop safely and do not continue with a dangerous braking defect.

Reviewed reading for this question

Treat lost air assistance as a braking faultReviewed guidance summary · The primary technical source is explicitly air-over-hydraulic, not an unrelated vacuum servo.Do not move with unsafe brake-air pressureReviewed guidance summary · The primary technical source is explicitly air-over-hydraulic, not an unrelated vacuum servo.

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