Loading the question bank
Revision question · Environmental issues
Revision material from the imported DVSA bank includes source-checked Lanekind learning corrections. These corrections are not newly issued official examination questions, and practice does not reproduce a live test paper.
Most large vehicles have a rev counter (tachometer) that's divided into coloured bands. This helps you to drive in the most fuel-efficient way and avoid damage to the engine. The green band is the one that gives adequate torque and power with optimum fuel economy.
Reviewed reading for this question