Civil Engineering - Concrete Technology

1. 

Separation of coarse aggregates from mortar during transportation, is known

A. bleeding
B. creeping
C. segregation
D. shrinkage
E. none of these.

Answer: Option C

Explanation:

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2. 

According to the recommendations of IS : 456-1978, the expansion joints

A. are provided where plane changes abruptly
B. are provided to ensure minimum resistance
C. are supported on separate columns
D. do not carry reinforcement across them
E. all the above.

Answer: Option E

Explanation:

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3. 

Grading of sand causes great variation in

A. workability of concrete
B. strength of concrete
C. durability of concrete
D. handing and placing of concrete
E. all the above.

Answer: Option E

Explanation:

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4. 

Shrinkage in concrete can be reduced by using

A. low water cement ratio
B. less cement in the concrete
C. proper concrete mix
D. presaturated aggregates
E. all the above.

Answer: Option E

Explanation:

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5. 

Ordinary concrete is not used for concrete grade

A. M 100
B. M 150
C. M 200
D. M 250
E. M 400

Answer: Option E

Explanation:

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