DVSA Environmental Awareness

Question 1

What is the most fuel-efficient way to drive?

Accepted Answer

Use smooth acceleration, read the road ahead, and maintain a steady speed

Answer

Smooth, progressive acceleration, anticipating the road ahead, and avoiding unnecessary braking are the keys to fuel-efficient driving. Planning ahead reduces the need for sudden speed changes.

Question 2

How does driving at higher speeds affect fuel consumption?

Accepted Answer

Fuel consumption increases significantly — driving at 70 mph uses up to 30% more fuel than at 50 mph

Answer

Fuel consumption increases rapidly at higher speeds due to greater air resistance. Driving at 70 mph can use up to 30% more fuel than driving at 50 mph.

Question 3

What is the purpose of a catalytic converter?

Accepted Answer

To convert harmful exhaust gases into less harmful substances

Answer

A catalytic converter converts toxic gases such as carbon monoxide, hydrocarbons, and nitrogen oxides into less harmful carbon dioxide, water vapour, and nitrogen.

Question 4

Why should you avoid unnecessary engine idling?

Accepted Answer

It wastes fuel, increases emissions, and is illegal in some areas with a fixed penalty notice

Answer

Engine idling wastes fuel, produces unnecessary emissions, and contributes to poor air quality. Under the Road Traffic (Vehicle Emissions) Regulations, local authorities can issue fixed penalties for unnecessary idling.

Question 5

What is the benefit of keeping your tyres at the correct pressure for fuel economy?

Accepted Answer

Correctly inflated tyres reduce rolling resistance, improving fuel efficiency by up to 2%

Answer

Under-inflated tyres increase rolling resistance, meaning the engine works harder and uses more fuel. Keeping tyres at the correct pressure can improve fuel efficiency by up to 2% and extends tyre life.

DVSA UK Driving Theory Practice Test

DVSA UK Driving Theory Practice Test

DVSA Environmental Awareness