Civil Engineering - Concrete Technology

6. 

If the engineer-in-charge approves, the 10 cm cubes may be used for the work test of concrete provided maximum nominal size of aggregate, does not exceed

A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
E. 30 cm

Answer: Option C

Explanation:

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7. 

The diameter of the Vicat plunger is 10 mm and its length varies from

A. 20 mm to 30 mm
B. 30 mm to 40 mm
C. 40 mm to 50 mm
D. 50 mm to 60 mm
E. none of these.

Answer: Option C

Explanation:

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8. 

The shrinkage of concrete

A. is proportional to water content is the mix
B. is proportional to cement concrete
C. increases with age of concrete
D. all the above.

Answer: Option D

Explanation:

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9. 

The ratio of various ingredients (cement, sand, aggregates) in concrete of grade M 200, is

A. 1 : 2 : 4
B. 1 : 3 : 6
C. 1 : : 3
D. 1 : 1 : 2
E. 4 : 2 : 1

Answer: Option C

Explanation:

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10. 

Separation of water or water sand cement from a freshly concrete, is known

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

Answer: Option A

Explanation:

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