Building Materials
For the manufacture of plywood, veneers are placed so that grains of adjacent veneers

Inclined at 45°
Inclined at 60°
Parallel
Run at right angles

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

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

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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:

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
A is true but R is false
A is false but R is true

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