Eco-Driving & Fuel Efficiency Flashcards
6 cards from real CPC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Eco-Driving & Fuel Efficiency flashcards as text
What is AdBlue (DEF) and why is it important for modern diesel HGVs?
Answer: A urea solution injected into the exhaust to reduce NOx emissions to comply with Euro emissions standards
AdBlue is used in Selective Catalytic Reduction (SCR) systems to convert harmful nitrogen oxides (NOx) in exhaust gases into harmless nitrogen and water, enabling compliance with Euro 5/6 standards.
Which gear-changing practice promotes fuel efficiency?
Answer: Changing up as early as possible (block shifting where appropriate) to keep engine revs low in the fuel-efficient range
Changing up early and block shifting keeps the engine in its fuel-efficient low-rev range; high revs in a lower gear burn significantly more fuel for the same vehicle speed.
How does route planning contribute to eco-driving for HGV operators?
Answer: Selecting routes that minimise stop-start traffic, steep gradients and distance reduces fuel consumption and emissions
Routes with fewer traffic lights, less congestion, fewer steep hills and lower total distance all reduce fuel consumption; dynamic route planning using real-time traffic data maximises efficiency.
What is the environmental benefit of reducing HGV fuel consumption through eco-driving?
Answer: Reduced CO₂, NOx and particulate emissions contributing to lower air pollution and greenhouse gas output
Each litre of diesel not burned avoids approximately 2.68 kg of CO₂; eco-driving also reduces NOx and particulate emissions that cause local air quality problems and health impacts.
Predictive cruise control systems available on modern HGVs improve fuel economy by:
Answer: Using GPS topography data to adjust speed slightly before hills to optimise engine load and use gravity on descents
Predictive cruise control uses GPS and gradient data to accelerate slightly before a rise (using momentum) and reduce speed before a descent (using gravity), reducing engine work and fuel consumption.
What is a 'fuel card telematics' system used by HGV operators for?
Answer: Tracking fuel usage per vehicle and driver to identify inefficient vehicles, driving styles and fuel fraud
Fuel card telematics correlates fuel purchases with vehicle telemetry data, enabling operators to identify which vehicles or drivers have higher fuel consumption, spot fraud and implement targeted eco-driving training.