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Correct!

You're leaving your vehicle parked on a road. When may you leave the engine running?

If you'll be parked for less than five minutes
If the battery is flat
When you're in a 20 mph zone
Not on any occasion
Correct answer

DVSA theory test explanation

When parking, all ancillary controls should be switched off and the engine stopped. Make sure that the handbrake is applied firmly before leaving the vehicle.

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