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Consider the following statements about viscoelastic behaviour in produce:

1. Stress relaxation is measured at constant strain.

2. Creep is measured at constant stress.

3. Bruising depends only on the magnitude of the load, not its duration.

Which of the statements given above is or are correct?

  • A.1 and 2 only
  • B.1 and 3 only
  • C.2 and 3 only
  • D.1, 2 and 3

Answer: A

The first two are the standard definitions. Because part of the deformation is time-dependent, how long a load is held matters as much as how large it is, which is why stacking height and transit time both cause bruising.

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