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PSC Civil Engg: Fluid Mechanics Quiz 2

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Question 1

While conducting the flow measurement using a triangular notch, an error of +2% in head over the notch is observed. The percentage error in the computed discharge would be

Question 2

Cavitation is likely to occur if
1) Pressure becomes very high
2) Temperature becomes low
3) Pressure at the specific points falls below vapour pressure
4) Energy is released with the onset of a high intensity wave due to noise and vibration of the machine.
Which of the above statements are correct?

Question 3

At a rated capacity of 44 cumec, a centrifugal pump develops 36 m of head when operating at 725 rpm. What is its specific speed?

Question 4

At a hydraulic jump, the depths at its two sides are 0.3 m and 1.2m. The head loss in the jump is

Question 5

A 7.5 m wide rectangular channel conveys 12 m3/s of water with a velocity of 1.5 m/s. The specific energy head of the flow is
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