Building Materials
Advantage of a clamp compared to a kiln for burning bricks is that

It gives more output of first class bricks
It is suitable when bricks are required in large numbers
It has less initial cost
It takes less time for burning

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Building Materials
Assertion A : Paints with white lead base are not recommended for painting of iron works.Reason R : Paints with white lead base do not check rusting of iron.Select your answer according to the coding system given below:

A is false but R is true
A is true but R is false
Both A and R is true but R is not the correct explanation of A
Both A and R is true and, R is the correct explanation of A

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