Building Materials - Section 6 Multiple Questions and Answers.




11.Cast iron contains carbon approximately
A. 1.5% to 5.5%
B. 0.05% to 1.75%
C. 0.25%
D. none to these.

12.Plastic asphalt is
A. used as a water proofing layer over roof
B. a mixture of cement and asphalt
C. a natural asphalt
D. a refinery product.

13.For obtaining vinyl chloride acetate, the method used, is
A. addition polymerization
B. condensation polymerization
C. co-polymerization
D. none of these.

14.The yield strength and tensile strength of low carbon steel may be improved by the addition of
A. manganese
B. chromium
C. nickel
D. venadium

15.Bitumen completely dissolves in
A. carbon bisulphide
B. chloroform
C. benzol
D. All of these.

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