---
title: "How can you reduce the chances of your vehicl… | Theory Test"
description: "How can you reduce the chances of your vehicle setting alight? The correct answer is “Investigate any strong fuel smells”. Read the instructor's explanation o"
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[Theory test](/theory)/ [Question bank](/theory/questions)/ Incidents, accidents and emergencies 

# How can you reduce the chances of your vehicle setting alight?

DVSA-style practice question · Incidents, accidents and emergencies

## The answer options

-   Use fuel additives 
-   Avoid having a full fuel tank 
-   Keep water levels above the maximum 
-   Investigate any strong fuel smells**Correct** 

## Why that is the answer

A strong smell of fuel usually indicates a leak in the fuel system. Petrol or diesel leaking onto hot engine components or electrical wiring creates a severe fire risk, so you should investigate any fuel smells immediately. Overfilling your coolant reservoir can cause damage through excess pressure rather than preventing fires. Maintaining a full fuel tank or using fuel additives will not prevent vehicle fires if a leak is present.

## How this comes up in the real test

Questions from incidents, accidents and emergencies appear throughout the 50-question multiple-choice section, and the wording changes between versions. Learn the rule rather than the sentence: the DVSA can ask the same point from the opposite direction, and a memorised answer falls over the moment the phrasing moves.

The pass mark is 43 out of 50, so seven wrong answers is your entire margin. If a whole category is shaky, run the topic practice below until you are getting every question right for the right reason, then go back to full mocks under the clock.

[Practise Incidents, accidents and emergencies](/theory/quiz/incidents-emergencies)[Sit a full mock test](/theory/mock-test)

## More incidents, accidents and emergencies questions

-   [After a collision, someone is unconscious in their vehicle. When should you call the emergency services?](/theory/questions/after-a-collision-someone-is-unconscious-in-their-vehicle-when-should-you-call-the-emergen)
-   [An adult casualty isn’t breathing. CPR should be administered to keep the blood flowing. How hard should you press against their chest?](/theory/questions/an-adult-casualty-isn-t-breathing-cpr-should-be-administered-to-keep-the-blood-flowing-how)
-   [An injured motorcyclist is lying unconscious in the road. The traffic has stopped and there’s no further danger. What could you do to help?](/theory/questions/an-injured-motorcyclist-is-lying-unconscious-in-the-road-the-traffic-has-stopped-and-there)
-   [An injured person has been placed in the recovery position. They’re unconscious but breathing normally. What else should be done?](/theory/questions/an-injured-person-has-been-placed-in-the-recovery-position-they-re-unconscious-but-breathi)
-   [At an incident, a casualty is unconscious but breathing. When should you move them?](/theory/questions/at-an-incident-a-casualty-is-unconscious-but-breathing-when-should-you-move-them)
-   [At an incident, a casualty isn’t breathing. What should you do while helping them to start breathing again?](/theory/questions/at-an-incident-a-casualty-isn-t-breathing-what-should-you-do-while-helping-them-to-start-b)

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