Questions and answers for exam Preparation

MCQs

Total Questions : 366 | Page 4 of 37 pages

Question 31. . Pick up the correct statement from the following :

The amount of rainfall in 24 hours, is known as daily rainfall
The amount of rainfall in one year, is known as annual rainfall
The rain cycle period in India is taken as 35 years
All the above.

Discuss Question

Answer: Option D. -> All the above.

Question 32. . The storage capacity of a reservoir may be divided into three zones. The lowest zone is

Dead storage
Useful storage
Surcharge storage
None of these.

Discuss Question

Answer: Option A. -> Dead storage

Question 33. . Surcharge storage zone of a reservoir, is

below dead storage
between dead storage and useful storage
above useful storage
also known as valley storage.

Discuss Question

Answer: Option C. -> above useful storage

Question 34. . For estimating the run off of catchments, the mean value of the constant 'K in the Khosla's formula Qy = Py ? K (1.8 Ty + 32) is

1.21
1.23
1.25
1.27

Discuss Question

Answer: Option D. -> 1.27

Question 35. . Pick up the incorrect statement from the following :

The net amount of water which joins the surface streams in a catchment. is known as surface run-off
The amount of water which joins the stream from the underground water, is called base flow
The yearly run off in cm depth over the catchment, termed as the yield of the drainage basin
None of these.

Discuss Question

Answer: Option D. -> None of these.

Question 36. . The lowest outlet sluice in a dam is provided

below the dead storage
on the top level of dead storage
on the top level of useful storage
at the centre of the dam.

Discuss Question

Answer: Option B. -> on the top level of dead storage

Question 37. . In a reservoir the average volume of sediment deposition is 0.15 million cubic per year. If the dead storage and total capacity of the reservoir are 8 million cubic metres and 36 million cubic metres respectively,

the reservoir will theoretically be silted in 240 years
the reservoir will start reducing after 60 years
both (a) and (b)
neither (a) nor (b).

Discuss Question

Answer: Option C. -> both (a) and (b)

Question 38. . The ratio of total capacity and dead storage is kept

Discuss Question

Answer: Option C. -> 4

Question 39. . Pick up the correct statement from the following :

The ratio of the total sediment deposited in the reservoir to the total sediment flowing in the river, is called trap efficiency
The ratio of the reservoir capacity to the total inflow of water in it, is generally called capacity inflow ratio
Small capacity reservoirs on large rivers generally, silt less
All the above.

Discuss Question

Answer: Option D. -> All the above.

Question 40. . Before constructing a dam, the factor to be considered for controlling sedimentation, is