Civil Engineering - Concrete Technology

31. 

For the construction of cement concrete floor, the maximum permissible size of aggregate, is

A. 4 mm
B. 6 mm
C. 8 mm
D. 10 mm
E. 12 mm

Answer: Option D

Explanation:

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32. 

The process of proper and accurate measurement of concrete ingredients for uniformity of proportion, is known

A. grading
B. curing
C. mixing
D. batching
E. none of these.

Answer: Option D

Explanation:

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33. 

Pick up the correct statement from the following:

A. Insufficient quantity of water makes the concrete mix harsh
B. Insufficient quantity of water makes the concrete unworkable
C. Excess quantity of water makes the concrete segregated
D. Excess quantity of water causes bleeding in concrete
E. All the above.

Answer: Option E

Explanation:

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34. 

The preliminary test is repeated if the difference of compressive strength of three test specimens, exceeds

A. 5 kg/cm2
B. 8 kg/cm2
C. 10 kg/cm2
D. 12 kg/cm2
E. 15 kg/cm2

Answer: Option E

Explanation:

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35. 

Pick up the correct proportions of chemical ingredients of cement

A. Lime : Silica : Alumina : Iron oxide : 63 : 22 : 6 : 3
B. Silica : Lime : Alumina : Iron oxide : 63 : 22 : 6 : 3
C. Alumina : Silica : Lime : Iron oxide : 63 : 22 : 6 : 3
D. Iron oxide : Alumina : Silica : Lime : 63 : 22 : 6 : 3

Answer: Option A

Explanation:

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