How will you achieve the greatest efficiency of engine braking if you drive a combination vehicle consisting of a tractor and a trailer?

Explanation

Correct answer: I will put the vehicle in the lowest gear possible, taking into account the rotations of the engine.

Engine braking involves using the internal resistance of the engine to reduce speed, which is particularly important in the case of heavy vehicle combinations. The effectiveness of this manoeuvre is greatest in low gears, as they cause the engine to operate at higher revolutions, thereby generating significantly greater resistance and braking force. Therefore, to maximise the braking effect, the gear should be reduced to the lowest possible, while ensuring that the engine's revolutions do not exceed a safe range.

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