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Final setting time is distinguished from initial setting time by

  • A.measuring on a completely different specimen
  • B.using twice the quantity of mixing water
  • C.carrying out the test at a higher temperature
  • D.the use of a needle with an annular attachment

Answer: D

The attachment leaves a mark only while the paste is still soft, so its failure to mark the surface defines final set. The same specimen and the same apparatus serve for both measurements. Only the attachment on the needle is exchanged between the two readings.

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