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LGV study notes

Environmental Issues

Fuel economy, emissions, noise, planning routes and eco-driving.

What this topic covers

Fuel economy, emissions, noise, planning routes and eco-driving. The full LGV & HGV Theory Test & Toolkit app contains 79 questions on this topic.

In the app's syllabus: Vehicle noise, Wind resistance, Fuel consumption, Refueling.

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. How will they affect your vehicle?

A. They'll increase the fuel consumption
B. They'll reduce the stability
C. They'll require increased tyre pressures
D. They'll reduce the wind resistance ✓ correct

Explanation: Wind deflectors direct the wind either around or over your vehicle, so reducing the wind resistance. The vehicle then requires less power to make progress against the wind, and so will use less fuel.

Example 2

What would be affected by a vehicle with faulty suspension?

A. Overhead gantries
B. Road surfaces ✓ correct
C. Tyre pressures
D. Engine performance

Explanation: If your suspension is damaged, all the weight of the vehicle compresses the road and anything located below it. The vibrations travel through the ground and can also damage surrounding buildings.

Example 3

How could a professional driver improve their efficiency?

A. Keep to maximum speeds for shorter journeys
B. Plan routes to avoid busy times and congestion ✓ correct
C. Avoid route-planning because of the time it takes
D. Drive at a faster speed through hazardous areas

Explanation: If you plan your journey to avoid busy times, you can avoid congestion. That way, your overall journey time may be reduced, so cutting costs and making you a more efficient driver.

Example 4

Which fuel provides a reduction in exhaust emissions harmful to human health?

A. High-sulphur diesel
B. Red diesel
C. Low-sulphur diesel ✓ correct
D. Blue diesel

Explanation: Low-sulphur diesel reduces the levels of sulphur-dioxide particles in exhaust emissions. It's widely available and makes a contribution to reducing emissions that are harmful to human health.

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More LGV study notes

Get all 79 questions on this topic in the LGV & HGV Theory Test & Toolkit app.