Civil Engineering - Concrete Technology

46. 

The aggregate containing moisture in pores and having its suface dry, is known as

A. moist aggregates
B. very dry aggregates
C. dry aggregates
D. saturated surface dry aggregate
E. none of these.

Answer: Option D

Explanation:

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47. 

The commercial name of white and coloured cement in India, is

A. colocrete
B. rainbow cement
C. silvicrete
D. snowcem
E. all the above.

Answer: Option E

Explanation:

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48. 

Pick up the correct statement from the following:

A. An increase in water content must be accompanied by an increase in cement content
B. Angular and rough aggregates reduce the workability of the concrete
C. Large size aggregates increase the workability due to lesser surface area
D. The slump of the concrete mix decreases due to an increase in temperature
E. All the above.

Answer: Option E

Explanation:

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49. 

To hydrate 500kg of cement full water needed, is

A. 100 kg
B. 110 kg
C. 120 kg
D. 130 kg
E. 140 kg

Answer: Option D

Explanation:

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