Civil Engineering - Concrete Technology

1. 

Concrete is unsuitable for compaction by a vibrator if it is

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

Answer: Option D

Explanation:

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2. 

Inert material of a cement concrete mix, is

A. water
B. cement
C. aggregate
D. none of these.

Answer: Option C

Explanation:

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3. 

Sands of zone I are

A. coarse
B. medium
C. medium to fine
D. fine.

Answer: Option A

Explanation:

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4. 

The lower water cement ratio in concrete, introduces

A. smaller creep and shrinkage
B. greater density and smaller permeability
C. improved frost resistance
D. greater wear resistance and improved bond strength
E. all the above.

Answer: Option E

Explanation:

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5. 

The cement becomes useless if its absorbed moisture content exceeds

A. 1%
B. 2%
C. 3%
D. 4%
E. 5%

Answer: Option E

Explanation:

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