Civil Engineering - Concrete Technology

21. 

For a good concrete

A. aggregates should be hard and durable
B. cement should be sufficient to produce the required strength
C. water should be free from organic materials
D. mixing of ingredients should be done thoroughly so as to produce homogeneity
E. All the above.

Answer: Option E

Explanation:

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22. 

If the effective plan area of a warehouse is 54 sq. m, and maximum height of piles permitted is 270 cm, the number of cement bags to be stored, is

A. 2000 bags
B. 2200 bags
C. 2400 bags
D. 2700 bags
E. 3000 bags

Answer: Option D

Explanation:

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23. 

Gypsum is added for

A. colour
B. strength
C. controlling setting time
D. none of these.

Answer: Option C

Explanation:

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24. 

A concrete having a slump of 6.5 cm, is said to be

A. dry
B. earth moist
C. semi-plastic
D. plastic
E. none of these.

Answer: Option D

Explanation:

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25. 

Strength of concrete with passage of time

A. increases
B. decreases
C. fluctuates
D. remains constant.

Answer: Option A

Explanation:

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