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Which of the following pairs in respect of ordinary portland cement (OPC) are correctly matched ?
1. Initial setting time .......... 30 minutes
2. Final setting time ........ 10 hours
3. Normal consistency..... 10%
Select the correct answer using the codes givenbelow : Codes :
  • a)
    1, 2 and 3
  • b)
    2 and 3
  • c)
    1 and 2
  • d)
    1 and 3
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Which of the following pairs in respect of ordinary portland cement (O...
Correctly matched pairs in respect of Ordinary Portland Cement (OPC)

Initial Setting Time: The time taken by cement to change its state from plastic to a solid state.

Final Setting Time: The time taken by cement to attain its final setting time after mixing with water.

Normal Consistency: The amount of water required to make a standard cement paste with standard consistency.

1. Initial Setting Time: 30 minutes
2. Final Setting Time: 10 hours
3. Normal Consistency: 10%

The correct answer is option C, i.e., 1 and 2.

Explanation:

- Initial Setting Time: The initial setting time of OPC is the time taken by cement to change its state from plastic to a solid state. The initial setting time of OPC is generally 30 minutes.
- Final Setting Time: The final setting time of OPC is the time taken by cement to attain its final setting time after mixing with water. The final setting time of OPC is generally 10 hours.
- Normal Consistency: The normal consistency of OPC is the amount of water required to make a standard cement paste with standard consistency. The normal consistency of OPC is generally 30%.

Therefore, option C, i.e., 1 and 2, is the correct answer.
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Which of the following pairs in respect of ordinary portland cement (OPC) are correctly matched ?1. Initial setting time .......... 30 minutes2. Final setting time ........ 10 hours3. Normal consistency..... 10%Select the correct answer using the codes givenbelow : Codes :a)1, 2 and 3b)2 and 3c)1 and 2d)1 and 3Correct answer is option 'C'. Can you explain this answer?
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