Civil Engineering - Concrete Technology

11. 

Slump test of concrete is a meausre ofits

A. consistency
B. compressive strength
C. tensile strength
D. impact value.

Answer: Option A

Explanation:

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12. 

According to Water-Cement Ratio Law, the strength of workable plastic concrete

A. depends upon the amount of water used in the mix
B. does not depend upon the quality of cement mixed with aggregates
C. does not depend upon the quanity of cement mixed with aggregates
D. all the above.

Answer: Option D

Explanation:

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13. 

Pick up the incorrect statement from the following:

A. In properly graded aggregates, bulk density is more
B. In single size aggregates, bulk density is least
C. In single size aggregates, bulk density is maximum
D. None of these.

Answer: Option C

Explanation:

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14. 

Saw dust can be rendered chemically inert by boiling it in water containing

A. ferrous sulphate
B. potassium chloride
C. ammonia
D. nitric acid
E. sulphuric acid.

Answer: Option A

Explanation:

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15. 

Pick up the correct statement from the following:

A. High percentage of C3S and low percentage of C2S cause rapid hardening
B. High percentage of C3S and low percentage of C2S make the cement less resistive to chemical attack
C. Low percentage of C3S and high percentage of C2S contribute to slow hardening
D. Low percentage of C3S and high percentage of C2S provide greater resistance to chemical attack
E. All the above.

Answer: Option E

Explanation:

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