Revision question · Braking systems

Your lorry has manually drained air reservoirs without an air dryer. What routine helps prevent accumulated moisture freezing in frosty weather?

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

Drain the air tanks daily

Cover the air tanks with a blanket

Keep the engine at high revs when starting

Pump the brakes

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Drain the air tanks dailyThis was the right answer

For this system, drain the reservoirs daily using the manufacturer’s safe procedure. Vehicles with air dryers or automatic drains have different maintenance schedules; check the handbook rather than assuming daily manual draining suits every vehicle.

Reviewed reading for this question

Match reservoir draining to the fitted air systemReviewed guidance summary · The corrected manual-drain question names the no-dryer system; unfamiliar vehicles require checking, and frozen reservoir moisture can impair pressure build-up.

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