Revision question · Vehicle condition

Your air-brake system has manually drained reservoirs and no air dryer. What routine helps prevent collected moisture freezing?

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

Cover the air tanks with a blanket

Drain the tanks daily

Use the brakes frequently

Pump the brakes

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Drain the tanks dailyThis was the right answer

For this manual-drain system, drain the reservoirs daily using the safe instructed procedure. Systems with an air dryer or automatic drains have different inspection and maintenance schedules. Moisture can freeze and interfere with braking; never assume an unfamiliar system drains itself.

Reviewed reading for this question

Match reservoir draining to the fitted air systemReviewed guidance summary · The manual-drain question is explicitly scoped; dryer and automatic-drain systems follow their own schedules.

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