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

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Hydraulics and Fluid Mechanics in ME
Which of the following is used to measure the discharge ?

pitot tube
hotwire anemometer
current meter
venturimeter

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Hydraulics and Fluid Mechanics in ME
If velocity is zero over l/3rd of a cross-section and is uniform over remaining 2/3rd of the cross-section, then the correction factor for kinetic energy is

27/8
43924
44078
43892

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

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Hydraulics and Fluid Mechanics in ME
If the depth of water in an open channel is less than the critical depth, the flow is called

Torrential flow
Tranquil flow
Turbulent flow
Critical flow

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Hydraulics and Fluid Mechanics in ME
The ratio of the inertia force to the __________ is called Euler's number.

Elastic force
Pressure force
Viscous force
Surface tension force

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