Civil Engineering - Concrete Technology

36. 

Pick up the incorrect statemnt from the following. For performing compressive strength test of cement

A. cement and standard sand mortar are used in the ratio of 1 : 3
B. water is added at the rate of + 3.0 percentage of water where P is the percentage of water for standard consistency
C. A cube mould of 10 cm x 10 cm x 10 cm is used
D. The perpared moulds are kept in a atmosphere of 50% relative humidity
E. The temperature of water in the submerged tank for curing moulds, should be 27° ± 2°C.

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

37. 

For concreting tunnel linings, tran-portation of concrete is done by

A. pans
B. wheel borrows
C. containers
D. pumps
E. belt conveyors.

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

38. 

The operation of removing humps and hollows of uniform concrete surface, is known as

A. floating
B. screeding
C. trowelling
D. finishing
E. none of these.

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

39. 

The void ratio of

A. single size coarse aggregate is roughly 0.45.
B. graded coarse aggregate is roughly 0.040
C. fine aggregate is roughly 0.45
D. all the above.

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

40. 

The type of aggregates not suitable for high strength concrete and for pavements subjected to tension, is

A. rounded aggregate
B. irregular aggregate
C. angular aggregate
D. flaky aggregate
E. none of these.

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.