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Q: Initial setting time of OPC Cement is not less than ...........
  • A. 10 min
  • B. 20 min
  • C. 30 min
  • D. 40 min
Correct Answer: Option C - Initial setting time–It is regarded as the time elapsed between the moment that the water is added to the cement, to the time that the paste starts losing its plasticity generally for OPC initial setting time is not less than 30 min. • Normally a minimum of 30 min has maintained for mixing and handling operations.
C. Initial setting time–It is regarded as the time elapsed between the moment that the water is added to the cement, to the time that the paste starts losing its plasticity generally for OPC initial setting time is not less than 30 min. • Normally a minimum of 30 min has maintained for mixing and handling operations.

Explanations:

Initial setting time–It is regarded as the time elapsed between the moment that the water is added to the cement, to the time that the paste starts losing its plasticity generally for OPC initial setting time is not less than 30 min. • Normally a minimum of 30 min has maintained for mixing and handling operations.