Revision question · Band 2 traffic signs and signals, car control, pedestrians, mechanical knowledge

What's most likely to cause a crash, if it's allowed to get too low?

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.

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Anti-freeze level

Brake-fluid level

Battery electrolyte level

Radiator coolant level

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Brake-fluid levelThis was the right answer

You should carry out frequent checks on all fluid levels. The brake-fluid level will fall as the friction material on your brake shoes or pads wears down. If it falls below the minimum mark on the fluid reservoir, air could enter the hydraulic system, and this will lead to loss of braking efficiency.

Reviewed reading for this question

Vehicle maintenanceHighway Code annex · A spongy pedal or low brake fluid can indicate a dangerous hydraulic fault; stop normal use and obtain a qualified check.Car vehicle-safety questionsReviewed guidance summary · A spongy pedal or low brake fluid can indicate a dangerous hydraulic fault; stop normal use and obtain a qualified check.

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