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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The center of gravity of the volume of the liquid displaced by an immersed body is called

center of buoyancy
center of pressure
center of gravity
metacentre

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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.)

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

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Hydraulics and Fluid Mechanics in ME
A hydraulic coupling belongs to the category of

Energy generating machines
Power developing machines
Energy transfer machines
Power absorbing machines

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Hydraulics and Fluid Mechanics in ME
Total pressure on a lmxlm gate immersed vertically at a depth of 2 m below the free water surface will be

8000 kg
2000 kg
1000 kg
4000 kg

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Hydraulics and Fluid Mechanics in ME
Which of the following has highest coefficient of discharge ?

venturimeter
CipoUetti weir
sharp edged orifice
Borda’s mouthpiece running full

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Hydraulics and Fluid Mechanics in ME
The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a rectangular notch is given by

dQ/Q = (1/2) × (dH/H)
dQ/Q = (3/4) × (dH/H)
dQ/Q = (dH/H)
dQ/Q = (3/2) × (dH/H)

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