Civil Engineering - Building Materials

11. 

Cast iron contains carbon approximately

A. 1.5% to 5.5%
B. 0.05% to 1.75%
C. 0.250%
D. none to these.

Answer: Option A

Explanation:

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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.

Answer: Option B

Explanation:

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13. 

For obtaining vinyl chloride acetate, the method used, is

A. addition polymerization
B. condensation polymerization
C. co-polymerization
D. none of these.

Answer: Option C

Explanation:

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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
E. tungsten.

Answer: Option D

Explanation:

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15. 

Bitumen completely dissolves in

A. carbon bisulphide
B. chloroform
C. benzol
D. coaltar
E. All of these.

Answer: Option E

Explanation:

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