1.

Which of the following statement is INCORRECT with respect to First class bricks?

A. No impression should be left on the brick when a scratch is made by a finger nail.
B. A metallic or ringing sound should come when two bricks are struck against each other.
C. Water absorption of about 22% of its dry weight is allowed.
D. These should be free from flaws, cracks and stones.
Answer» D. These should be free from flaws, cracks and stones.


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