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

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

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

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