Civil Engineering - Concrete Technology

36. 

The size of fine aggregates does not exceed

A. 2.75 mm
B. 3.00 mm
C. 3.75 mm
D. 4.75 mm
E. 5.75 mm

Answer: Option D

Explanation:

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37. 

An aggregate is known as cyclopean aggregate if its size is more than

A. 4.75 mm
B. 30 mm
C. 60 mm
D. 75 mm
E. 90 mm.

Answer: Option D

Explanation:

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38. 

The main object of compaction of concrete, is:

A. to eliminate air holes
B. to achieve maximum density
C. to provide initimate contact between the concrete and embedded materials
D. all the above.

Answer: Option D

Explanation:

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39. 

Pick up the correct statement from the following:

A. The quality of water governs the strength of concrete
B. The quantity of water required for concreting, depends upon the grading of aggregate amd method of compaction
C. 10% excess of water reduces the strength of concrete by 15%
D. 30% excess of water reduces the strength of concrete by 50%
E. All the above.

Answer: Option E

Explanation:

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40. 

Particles of 0.002 mm size are that of

A. clay
B. sand
C. gravel
D. none of these.

Answer: Option A

Explanation:

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