Irrigation Engineering MCQ Questions & Answers

31

The area between the isohyets 45 cm and 55 cm is 100 square km and between 55 cm and 65 cm is 150 square km. The average depth of annua! precipitation over the above basin of 250 square km will be

A) 50 cm B) 55 cm C) 56 cm D) 60 cm

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Answer & Solution

Answer: Option C

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32

Which of the following canal outlets maintains a constant discharge ?

A) non-modular outlet B) flexible outlet C) rigid module D) none of the above

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Answer & Solution

Answer: Option C

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33

The normal annual precipitation at stations X, A, B and C are 700 mm, 1000 mm, 900 mm and 800 mm respectively. If the storm precipitation at three station A, B and C were 100 mm, 90 mm and 80 mm respectively, then the storm precipitation for station X will be

A) 70mm B) 80mm C) 90 mm D) 105 mm

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Answer & Solution

Answer: Option A

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34

The level of the floor of a syphon aqueduct can be obtained

A) By subtracting the depth of the culvert from the canal bed level B) By subtracting the thickness of culvert plus the depth of the culvert from the canal bed level C) Both (A) and (B) D) None of these

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Answer & Solution

Answer: Option B

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35

F.S.L. of a canal at its head with respect to parent channel is kept

A) At the same level B) 15 cm lower C) 15 cm higher D) None of these

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Answer & Solution

Answer: Option B

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36

The ratio of the head recovered to the head put in, is known as

A) Efficiency B) Sensitivity C) Flexibility D) Modular limit

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Answer & Solution

Answer: Option A

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37

Pick up the incorrect statement from the following

A) Side walls of a venturi head flume are splayed out from the end of the throat at 1 : 10 for a length of 4.5 m B) Length of side walls should be such that the width of the flume is made equal to $${\frac{2}{3}^{{\text{rd}}}}$$ the bed width of the distributary C) Once the width of the flume becomes $${\frac{2}{3}^{{\text{rd}}}}$$ of the width of the distributary, the splayed walls are increased to 1 in 3 to get full bed width D) None of these

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Answer & Solution

Answer: Option D

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38

According to Khosla, the exits gradient of surface flow

A) Depends upon the $$\frac{{\text{b}}}{{\text{d}}}$$ ratio B) Is independent of the $$\frac{{\text{b}}}{{\text{d}}}$$ ratio C) Is independent of the depths of $$\frac{{\text{b}}}{{\text{s}}}$$ cut off walls D) None of these

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Answer & Solution

Answer: Option A

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39

In case of non-availability of space due to topography, the most suitable spillway is

A) straight drop spillway B) shaft spillway C) chute spillway D) ogee spillway

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Answer & Solution

Answer: Option B

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40

Assertion A : To estimate the rainfall over a catchment, the number of raingauges required per unit area is large for hilly areas.
Reason R : Rainfall gradient is steep.
Select your correct answer according to the coding system given below :

A) Both A and R are true and R is the correct explanation of A B) Both A and R are true but R is not the correct explanation of A C) A is true but R is false D) A is false but R is true

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Answer & Solution

Answer: Option A

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Irrigation Engineering MCQ Questions & Answers | Civil Engineering