Irrigation Engineering MCQ Questions & Answers | Civil Engineering

Irrigation Engineering MCQ Questions & Answers | Civil Engineering

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 21) In a Sarda type fall, the rectangular crest, may be used for discharge upto

(A) 6 cumecs

(B) 10 cumecs

(C) 14 cumecs

(D) 20 cumecs

Answer: Option C (14 cumecs)

 22) The measure to remove water logging of land, is

(A) To reduce percolation from canals and water courses

(B) To increase outflow from the ground water reservoir

(C) Both (a) and (b)

(D) Neither (a) nor (b)

Answer: Option C (Both (a) and (b))

 23 ) Borrow pits should preferably be located in ?

(A) Field on the left side of the canal

(B) Field on the right side of the canal

(C) Fields on both sides of the canal

(D) Central half width of the section of the canal

Answer: Option D (Central half width of the section of the canal)

 24 ) The sinuosity of a meander is the ratio of ?

(A) Meander length and the width of meander

(B) Meander length and half width of the river

(C) Curved length and the straight distance

(D) None of these

Answer: Option C (Curved length and the straight distance)

25) Pick up the correct statement from the following ?

(A) If the flexibility is more than one, the outlet is hyper-proportional

(B) If the setting of an outlet is higher than that required for proportionality, the outlet is hyperproportional

(C) If the flexibility is zero, it is a rigid module

(D) All the above

Answer: Option D (All the above)

 26) According to Khosla, the exits gradient of surface flow

(A) Depends upon the b/d ratio

(B) Is independent of the b/d ratio

(C) Is independent of the depths of d/s cut off walls

(D) None of these

Answer: Option A ( Depends upon the b/d ratio)

 27) A hydraulic structure is designed to withstand

(A) Seepage forces

(B) Hydraulic jump

(C) Hydraulic pressure

(D) All the above

Answer: Option D (All the above)

 28) If the optimum depth of kor watering for a crop is 15.12 cm, the outlet factor for the crop for four week period in hectares per cumec, is ?

(A) 1000

(B) 1200

(C) 1400

(D) 1600

Answer: Option D (1600)

 29) In Montague type fall

(A) A straight glacis is provided

(B) A circular glacis is provided

(C) A parabolic glacis is provided

(D) No glacis is provided

Answer: Option C (A parabolic glacis is provided)

 30) 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

Answer: Option B (To increase water head upstream when a main canal is running with low supplies)

 31) According to Lacey, depth of scour in a river depends upon the straightness of the reach. If D is the depth of scour in regime flow in a right angled bend, it is ?

(A) 1.25 D

(B) 1.50 D

(C) 1.75 D

(D) 2.00 D

Answer: Option D ( 2.00 D)

 32) According to Lacey, in regime conditions

(A) Silt is kept in suspension by vertical components of eddies

(B) Entire cross-section of the channel is generated at all points by the forces normal to the wetted perimeter

(C) Both (a) and (b)

(D) Neither (a) nor (b)

Answer: Option C (Both (a) and (b))



 33) The most suitable section of a lined canal, is

(A) Triangular section with circular bottom for small canals

(B) Trapezoidal section with rounded corners for large canals

(C) Both (a) and (b)

(D) None of these

Answer: Option C (Both (a) and (b))

 34) An outlet is said to be proportional if its flexibility, is

(A) Zero

(B) Less than one

(C) More than one

(D) One

Answer: Option D (One)

 35) 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

Answer: Option B (By subtracting the thickness of culvert plus the depth of the culvert from the canal bed level)

36) If the straight sides of a triangular section of a lined canal with circular bottom of radius D, make the horizontal, the hydraulic mean depth is ?

(A) D

(B) D/2

(C) D/3

(D) D/5

Answer: Option B (D/2)

 37) According to Bligh's creep theory, percolating water flows along

(A) Straight path under the foundation of the dam

(B) Circular path under the foundation of the dam

(C) The outline of the base of the foundation of the dam

(D) None of these

Answer: Option D (None of these)

 38) For a standing crop, the consumptive use of water is equal to the depth of water

(A) Transpired by the crop

(B) Evaporated by the crop

(C) Transpired and evaporated by the crop

(D) Used by the crop in transpiration, evaporation and also the quantity of water evaporated from adjacent soil

Answer: Option D (Used by the crop in transpiration, evaporation and also the quantity of water evaporated from adjacent soil)

 39) Bed bars in a canal are provided

(A) To watch the general behaviour of canal

(B) To measure the discharge

(C) To raise the supply level

(D) To control the silting

Answer: Option A (To watch the general behaviour of canal)

40) The velocity of drainage water in the barrels of a syphon-aqueduct, is normally limited to

(A) 1 to 2 m per second

(B) 2 to 3 m per second

(C) 3 to 4 m per second

(D) 4 to 5 m per second

Answer: Option B (2 to 3 m per second)