Irrigation Engineering MCQ Questions & Answers

51

Pick up the incorrect statement from the following:

A) In free flooding irrigation, water is admitted at one corner of a field and is allowed to spread over the entire area B) In check method of irrigation, the field is divided into smaller compartments and water is admitted to each in turn C) In furrow irrigation water is admitted between the rows of plants in the field D) None of these

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Answer & Solution

Answer: Option D

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52

A deficit of sediments in flowing water may cause a river

A) Meandering type B) Aggrading type C) Degrading type D) Sub-critical type

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Answer & Solution

Answer: Option C

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53

Which one of the following statements is correct?

A) The canal system and the drainage system are complementary B) The canal system runs on ridges, gets divided into smaller channels and spreads its water on the land C) The drainage system runs along the lowest line, collects drainage water from the slopes and joins the main stream D) All the above

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Answer & Solution

Answer: Option D

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54

Cyclonic precipitation is caused by lifting of an air mass due to

A) pressure difference B) temperature difference C) natural topographical barriers D) all of the above

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Answer & Solution

Answer: Option A

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55

If the height of the hydraulic gradient line above the floor of thickness t is h and the specific gravity of the material of the floor is G, the minimum thickness t of the floor downstream of the crest-wall, is given by the equation

A) $${\text{t}} = \frac{{{\text{h}} + 1}}{{{\text{G}} + {\text{t}}}}$$ B) $${\text{t}} = \frac{{{\text{h}} - 1}}{{{\text{G}} + {\text{t}}}}$$ C) $${\text{t}} = \frac{{{\text{h}} - 1}}{{{\text{G}} - {\text{t}}}}$$ D) $${\text{t}} = \frac{{{\text{h}} + 1}}{{\text{G}}}$$

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Answer & Solution

Answer: Option C

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56

Side slopes generally kept for canals in loam soil, are:

A) 1 : 1 in cutting and $$1\frac{1}{2}$$ : 1 in filling B) $$1\frac{1}{2}$$ : 1 in cutting and 2 : 1 in filling C) Neither (A) nor (B) D) Both (A) and (B)

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Answer & Solution

Answer: Option D

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57

If the R.L’s of canal bed level and high flood level of drainage are 212.0 m and 210.0 m respectively, then cross drainage work will be

A) aqueduct B) superpassage C) syphon D) syphon aqueduct

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Answer & Solution

Answer: Option A

Solution:

An aqueduct is a type of cross drainage work where the canal passes over the drainage.

In this case, the R.L. (Reduced Level) of the canal bed is higher at 212.0 m compared to the high flood level of the drainage at 210.0 m.

This difference in levels makes an aqueduct the appropriate structure, allowing the canal to safely cross above the drainage.

58

The most suitable location of a canal head work, is

A) Boulders stage of the river B) Delta stage of the river C) Rock stage of the river D) Trough stage of the river

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Answer & Solution

Answer: Option D

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59

Cross regulators in main canals are provided

A) To regulate water supply in the distributaries B) To increase water head upstream when a main canal is running with low supplies C) To overflow excessive flow water D) None of these

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Answer & Solution

Answer: Option B

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60

Process of meandering is due to

A) Sediment load of streams B) Discharge and hydraulic properties of streams C) Relative erodibility of the bed and banks D) All the above

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Answer & Solution

Answer: Option D

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Irrigation Engineering MCQ Questions & Answers | Civil Engineering