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A van rides acceptably when laden but crashes over bumps when empty.

Which explanation fits best?

  • A.The dampers have failed, which allows the body to oscillate and therefore produces the harsh sensation reported
  • B.The tyres are underinflated
  • C.The suspension bushes are worn, which permits the arms to move and therefore transmits shock into the body shell
  • D.The springs are rated for the laden condition

Answer: D

A spring chosen to carry the full payload is far too stiff for the empty vehicle, which is the classic commercial vehicle ride complaint. Progressive or air springs address it. Failed dampers produce float rather than harshness. Most errors here come from carrying across a result from a neighbouring case where it does not hold. Reading the definition literally, rather than recalling a summary, avoids the usual confusion.

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