CPC Environmental Impact — Questions and Answers
Question 1: What is eco-driving and why is it important for professional HGV drivers?
- Driving an electric vehicle only
- A driving style that reduces fuel consumption, emissions, and vehicle wear through smoother, more efficient driving (Correct answer)
- Driving only in green-painted lanes
- Driving at maximum speed to reduce journey time
Correct answer: A driving style that reduces fuel consumption, emissions, and vehicle wear through smoother, more efficient driving
Eco-driving involves techniques such as smooth acceleration, anticipating traffic flow, maintaining steady speeds, and correct gear use. It can reduce fuel consumption by 10-15%, lower emissions, reduce brake and tyre wear, and improve road safety.
Question 2: How does tyre pressure affect fuel consumption?
- Tyre pressure has no effect on fuel
- Under-inflated tyres increase rolling resistance, increasing fuel consumption by up to 3% (Correct answer)
- Over-inflated tyres use more fuel
- Only front tyre pressure matters
Correct answer: Under-inflated tyres increase rolling resistance, increasing fuel consumption by up to 3%
Under-inflated tyres increase rolling resistance, meaning the engine has to work harder to move the vehicle. This can increase fuel consumption by up to 3% and also causes uneven tyre wear, reducing tyre life and potentially compromising safety.
Question 3: What is the purpose of the UK Clean Air Zones (CAZs)?
- To ban all vehicles from city centres
- To reduce air pollution by charging vehicles that do not meet emission standards to enter designated areas (Correct answer)
- To provide free parking for electric vehicles only
- To increase speed limits in urban areas
Correct answer: To reduce air pollution by charging vehicles that do not meet emission standards to enter designated areas
Clean Air Zones charge vehicles that do not meet minimum emission standards (typically Euro 6 for diesel HGVs) to enter designated urban areas. Cities including Birmingham, Bristol, and Bath have implemented CAZs to improve air quality.
Question 4: What is AdBlue and why is it used in modern HGVs?
- A type of windscreen washer fluid
- A urea-based solution injected into the exhaust to reduce nitrogen oxide (NOx) emissions (Correct answer)
- A fuel additive that increases power
- A coolant for the engine
Correct answer: A urea-based solution injected into the exhaust to reduce nitrogen oxide (NOx) emissions
AdBlue is a urea-based solution used in Selective Catalytic Reduction (SCR) systems. It is injected into the exhaust to convert harmful nitrogen oxides (NOx) into harmless nitrogen and water, helping vehicles meet Euro 6 emission standards.
Question 5: How does excessive engine idling affect the environment?
- It has no environmental impact
- It produces unnecessary emissions, wastes fuel, and contributes to local air pollution (Correct answer)
- It is beneficial as it keeps the engine warm
- It only produces water vapour
Correct answer: It produces unnecessary emissions, wastes fuel, and contributes to local air pollution
Excessive engine idling produces unnecessary CO2, NOx, and particulate emissions while wasting fuel. Many local authorities have anti-idling bylaws, and unnecessary idling near schools, hospitals, or residential areas is particularly problematic.
Question 6: What is the 'green band' on an HGV rev counter?
- The maximum revs for racing
- The most fuel-efficient rev range for normal driving (Correct answer)
- The danger zone indicating over-revving
- The range used only during vehicle testing
Correct answer: The most fuel-efficient rev range for normal driving
The green band on the rev counter indicates the most fuel-efficient operating range for the engine. Driving within this range (typically 1,000-1,500 rpm for modern HGVs) optimises fuel consumption and reduces emissions while maintaining adequate performance.
CPC Environmental Impact
What is eco-driving and why is it important for professional HGV drivers?