Building Materials
The curved swellings from the growth of layers or wounds left after branches are cut off in an irregular manner are known as

None of these
Burls
Knots
Rindgalls

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Building Materials
When a brick is immersed in water for 24 hours and then dried, if

10 percent surface is covered with grey or white deposits, the brick has slight efflorescence
50 percent surface is covered with grey or white deposits, the brick has serious efflorescence
All listed here
No grey or white deposits appear on the surface, the brick is free from soluble salts

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Building Materials
Distemper is

A paint consisting of colored cement and water
A paint consisting of powdered chalk, pigments and water
A drying agent
A water proofing agent

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