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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The discharge of a double acting reciprocating pump is (where L = Length of stroke, A = Cross-sectional area of piston, and N = Speed of crank in r.p.m.)

(L.A.N)/60
L.A.N
(2 L.A.N)/60
2 L.A.N

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Hydraulics and Fluid Mechanics in ME
An error of 1% in measuring head over the apex of the notch (H) will produce an error of _________ in discharge over a triangular notch.

0.02
0.025
0.015
0.01

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Hydraulics and Fluid Mechanics in ME
Power required (in watts) to drive a centrifugal pump is (where Hm = Manometric head in metres, w = Specific weight in N/m3, Q = Discharge of the pump in m3/s, and ηo = Overall efficiency of the pump)

(w Hm) / (Q × ηo)
(w Hm Q) / ηo
(w Q ηo) / Hm
(w Q) / (Hm × ηo)

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Hydraulics and Fluid Mechanics in ME
The angle of taper on draft tube is

Greater than 8°
Greater than 5°
Less than 8°
Greater than 15°

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Hydraulics and Fluid Mechanics in ME
The power transmitted through a pipe is (where w = Specific weight in N/m3, and Q = Discharge in m3/s)

w × Q × hf
w × Q (H + hf)
w × Q (H - hf)
w × Q × H

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Hydraulics and Fluid Mechanics in ME
The viscosity of a liquid __________ its rate of flow through a hole in a vessel.

Both A and B
Effects
Does not effect
None of these

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