Revision question · Vehicle condition

What problem is a correctly specified diesel fuel heater designed to help prevent?

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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The cab temperature from dropping

The radiator from freezing

The windows from misting

The diesel from solidifying

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The diesel from solidifyingThis was the right answer

A suitable fuel heater reduces wax-related restriction by warming fuel before filtration. Wax crystals and frozen water are different problems. Follow the actual system specification; do not apply improvised heat or overheat the fuel.

Reviewed reading for this question

Understand diesel waxing and approved cold-weather measuresReviewed guidance summary · The correction distinguishes wax crystals from water freezing and forbids unapproved additives.

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