Back water curve is caused if

Civil Engineering : Hydraulics - Quiz(MCQ)

there is an increase in width of the channel

friction head loss is more than the bed slope

pressure is due to weir in the channel

All of the above

Correct Answer : pressure is due to weir in the channel

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An orifice is taken as large if

(Hâ‚‚ - Hâ‚) > H

(Hâ‚‚ - Hâ‚) > H/2

(Hâ‚‚ - Hâ‚) > H/4

(Hâ‚‚ - Hâ‚) > H/3

Correct Answer : Option (D) : (Hâ‚‚ - Hâ‚) > H/3

A closed cylindrical vessel of 100 cm diameter and 200 cm high is completely filled with a liquid (sp. weight 1600 kg/m3) when rotated about its vertical axis at 100 r.p.m. The total pressure on its lid, is

459 kg

549 kg

945 kg

954 kg

Correct Answer : Option (D) : 954 kg

An error of 1% in measuring the head of water over the crest of a triangular notch, produces an error in the discharge which is equal to

1.5%

2.0%

2.5%

4.5%

Correct Answer : Option (C) : 2.5%

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