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C1Difficulty 3/5

A lorry has aerodynamic air deflectors designed for its configuration and correctly adjusted. Can they help reduce fuel consumption?

Correct answer

Yes.

Yes, by reducing air resistance under the operating conditions for which they are designed. The effect depends on configuration, adjustment and speed; adding an arbitrary spoiler does not guarantee savings. Their function is not merely cosmetic, and the benefit is not limited to rigid lorries.

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All options

  • Only in the case of rigid trucks.

  • No, their function is basically aesthetic.

  • Yes.

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