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Irrigation Engineering

Irrigation Engineering
A minimum of 90 cm free board is provided if the discharge in the canal is between

Over 100 cumecs
30 to 60 cumecs
30 to 33 cumecs
Over 60 cumecs

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Irrigation Engineering
The most suitable section of a lined canal, is

Triangular section with circular bottom for small canals
Trapezoidal section with rounded corners for large canals
None of these
Both (a) and (b)

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Irrigation Engineering
In a barrage, the crest level is kept

Low with no gates
High with large gates
Low with large gates
High with no gates

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Irrigation Engineering
Study the following statements.
i) Levees are constructed parallel to river flow,
ii) Spurs are constructed parallel to river flow,
iii) Levees are constructed transverse to river flow,
iv) Spurs are constructed transverse to river flow.
The correct answer is

(i) and (ii)
(iii) and (iv)
(i) and (iv)
(ii) and (iii)

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Irrigation Engineering
As compared to gravity dams, earthen dams

require less skilled labour
require sound rock foundations
are costlier
are less susceptible to failure

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Irrigation Engineering
Solution of Laplacian equation in three dimensions d²φ/dx² + d²φ/dy² + d²φ/dz² = 0 of water in a syphon, is done by

Method of relaxation
Khosla's method
Analytical method
Unwin's method

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