Try a DVSA car practice theory test question from the Attitude DVSA topic

You're driving a car that has a diesel engine. What can a loose filler cap on your fuel tank cause?

Select one of these four answers before moving on to the next question.

It can make the engine difficult to start
It can make the roads slippery for other road users
It can improve your vehicle's fuel consumption
It can increase the level of exhaust emissions

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This DVSA explanation shows you why the correct answer is right (and the others are wrong), so you can understand the information around the question and remember it for the real car theory test.

Reveal the DVSA car theory test explanation
Diesel fuel can spill out if your filler cap is not secured properly. This is most likely to occur on bends, junctions and roundabouts, where it will make the road slippery, especially if it's wet. At the end of a spell of dry weather, road surfaces may be especially slippery where diesel has been spilled but it has not been washed away by rain.
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This is DVSA car revision theory test question 10 of 98 from our free UK car practice theory test. This practice test follows the same format as the real DVSA multiple-choice car theory test.

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