Building Materials - Section 4 Multiple Questions and Answers.




16.Cement paints usually
A. contain hydrated lime
B. contain 5% to 10% colour pigments
C. are prepared with white cement
D. all the above.

17.The cement becomes unsound by the presence of excess
A. sulphur
B. magnesia
C. lime
D. All of these.

18.The minimum compressive strength of 1st class bricks should be
A. 75 kg/cm2
B. 90 kg/cm2
C. 100 kg/cm2
D. 120 kg/cm2

19.A volatile substance added to a paint to make its application easy and smooth, is known as
A. base
B. solvent
C. vehicle
D. none to these.

20.The percentage of water for normal consistency, is
A. 5% to 15%
B. 10% to 25%
C. 15% to 25%
D. 25% to 35%.

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