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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.)

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

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Hydraulics and Fluid Mechanics in ME
The speed ratio in case of Francis turbine varies from

0.15 to 0.3
0.6 to 0.9
1 to 1.5
0.4 to 0.5

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Hydraulics and Fluid Mechanics in ME
In a free vortex motion, the radial component of velocity everywhere is

non-zero and finite
minimum
maximum
zero

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Hydraulics and Fluid Mechanics in ME
The force per unit length is the unit of

Surface tension
Compressibility
Viscosity
Capillarity

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Hydraulics and Fluid Mechanics in ME
A submerged body is said to be in a stable equilibrium, if its centre of gravity __________ the centre of buoyancy.

Coincides with
Lies above
None of these
Lies below

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Hydraulics and Fluid Mechanics in ME
Pascal-second is the unit of

dynamic viscosity
kinematic viscosity
pressure
surface tension

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