Civil Engineering - Irrigation

Exercise :: Irrigation - Section 3

46. 

The ratio of the rate of change of discharge of an outlet to the rate of change in level of water surface in a distributary at its normal depth, is known as

A. efficiency
B. sensitivity
C. flexibility
D. modular limit.

Answer: Option B

Explanation:

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47. 

Lacey's equation for calculating flood discharge in rivers, is

A. V = 10.8 R1/2 S1/2
B. V = 10.8 R2/3 S1/2
C. V = 10.8 R2/3 S1/3
D. V = 10.8 R1/3 S2/3

Answer: Option C

Explanation:

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48. 

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. rectangular section with rounded corners for large canals
D. both (a) and (b)
E. both (a) and (c)

Answer: Option D

Explanation:

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49. 

To hold hydraulic jumps, baffle walls are provided in

A. Sarda type falls
B. English type falls
C. Montague type falls
D. Vertical type falls.

Answer: Option B

Explanation:

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