Environmental Issues
Fuel economy, emissions, idling, Low Emission Zones and eco-driving.
What this topic covers
Fuel economy, emissions, idling, Low Emission Zones and eco-driving. The full LGV Theory Test app contains 75 questions on this topic, drawn from the official DVSA bank.
Worked examples
Here are a few practice questions from this topic. Try answering each before reading the explanation.
Example 1
Your lorry has been fitted with wind deflectors. When driving in windy conditions these will help to
- A. increase the amount of fuel you will use
- B. increase the wind resistance on your vehicle
- C. increase the pressure in the tyres
- D. reduce the wind resistance on your vehicle ✓ correct
- E. reduce the amount of fuel you will use ✓ correct
Explanation: Wind deflectors direct the wind either around or over your vehicle. Your vehicle then requires less power to make progress against the wind. As a result your vehicle will use less fuel.
Example 2
Red diesel is
- A. only used by private cars
- B. for authorised purposes only ✓ correct
- C. available at all garages
- D. very environmentally friendly
Explanation: Red diesel is subject to less excise duty than standard diesel, so it is considerably cheaper. It should only be used for authorised purposes. Any driver whose vehicle is found to be using this fuel illegally faces severe penalties.
Example 3
You are at a roadside check. What would staff from HM Revenue and Customs be looking for?
- A. Red diesel ✓ correct
- B. Vehicle defects
- C. Driver's hours records
- D. Exhaust emissions
Explanation: HM Revenue and Customs staff carry out a variety of checks during a roadside stop. These include checking for the correct type of fuel used, and the type and legality of any load being carried.
Example 4
As a driver you can help to protect the environment by
- A. driving faster to reduce travelling time
- B. avoiding town centres and using bypasses ✓ correct
- C. filling your fuel tank with red diesel fuel
- D. leaving your engine running in traffic jams
Explanation: By using bypasses you are less likely to be held up and can travel at a constant speed, thereby reducing the amount of pollution from your vehicle.
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