IRRIGATION

Q: If straight sides of a triangular section of a lined canal with circular bottom of radius R, make an angle θ with horizontal, the area of its cross-section, is

(a) :  R(θ + tan θ)
(b) :  R(θ + cot θ)
(c) :  R2(θ + tan θ)
(d) :  R2(θ + cot θ)
(e) :  R(θ + tan θ)
Answer:  R2(θ + cot θ)
Explanation:  

Q: 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) :  all of these
(e) :  None of these
Answer:  none of these.
Explanation:  

Q: Meandering of a river generally occurs, in

(a) :  rocky stage
(b) :  delta stage
(c) :  boulder stage
(d) :  trough stage.
(e) :  None of these
Answer:  trough stage.
Explanation:  

Q: The Lacey's regime velocity is proportional to

(a) :  R1/2 S3/4
(b) :  Q3/4 S1/3
(c) :  R3/4 S1/3
(d) :  R2/3 S1/2
(e) :  None of these
Answer:  R3/4 S1/3
Explanation:  

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