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State whether the following is true or false.
A cement that sets very quickly is always defective.

  • A.True
  • B.False
  • C.True only at large scales
  • D.False only at small scales

Answer: B

Quick setting cements are made deliberately for particular purposes such as underwater work and grouting. What is defective is a cement that sets faster than its own specification allows. Compliance is judged against the declared type rather than against habit.

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