Building Materials
Assertion A : Pure lime takes a long time to develop adequate strength.Reason R : Pure lime has slow hardening characteristics.Select your answer according to the coding system given below:

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

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Building Materials
Pick up the correct statement from the following: Method of sawing timber

All of these
In four quarters such that each board cuts annual rings at angles not less than 45°, is known as quarter sawing method
Cut out of quarter logs, parallel to the medullary rays and perpendicular to annual rings, is known as radial sawing
Tangentially to annual rings, is known as tangential method

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