Discussion
Assertion (A): Cement samples for compliance testing are composited from several increments.
Reason (R): A single grab sample would represent only one moment of a continuous production.
Answer: B
Correct answer: Both A and R are true, and R is the correct explanation of A
Both are true and the reason is the justification. Cement production varies continuously with feed, fuel and mill conditions, so a single grab sample tests one instant rather than the consignment. Combining increments taken through the loading gives a composite whose result represents what the customer actually receives, which is what a compliance test has to do.
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