Revision question · Vehicle condition

Before switching off a turbocharged engine that has been running above idle, what should you do?

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

Rev the engine up, then switch it off

Switch the engine off immediately

Allow the engine to idle, then switch it off

Switch the engine off and on repeatedly

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Allow the engine to idle, then switch it offThis was the right answer

Allow the engine to return to idle, then follow its handbook’s shutdown instructions. High-speed shutdown can interrupt oil supply while the turbo is still turning. The appropriate cool-down period depends on the engine and recent use; not every stop needs an extra minute.

Reviewed reading for this question

Let the turbo engine return to idle before shutdownReviewed guidance summary · The corrected question removes the blanket one-minute rule and respects model-specific shutdown instructions.

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