IRRIGATION

Q: An outlet which maintains a constant discharge irrespective of fluctuation in the water levels of the supplying channel or water course, is known as

(a) :  non-modular outlet
(b) :  semi-modular outlet
(c) :  flexible modular outlet
(d) :  right modular outlet.
(e) :  None of these
Answer:  right modular outlet.
Explanation:  

Q: When a canal flowing under pressure is carried below a natural drainage such that its F.S.L. does not touch the underside of the supporting structure, the structure so provided, is called

(a) :  syphon
(b) :  aqueduct
(c) :  super passage
(d) :  syphon-aqueduct.
(e) :  None of these
Answer:  super passage
Explanation:  

Q: Groynes are generally built

(a) :  perpendicular to the bank
(b) :  inclined down stream upto 30°
(c) :  inclined up stream up to 30°
(d) :  all the above.
(e) :  None of these
Answer:  inclined up stream up to 30°
Explanation:  

Q: Bligh's theory of seepage assumes

(a) :  equal weightage to the horizontal and vertical creep
(b) :  more weightage to horizontal creep than vertical creep
(c) :  less weightage to horizontal creep than vertical creep
(d) :  loss of head follows the sine curve.
(e) :  None of these
Answer:  equal weightage to the horizontal and vertical creep
Explanation:  

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