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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
An average value of coefficient of velocity is

0.76
0.97
0.62
0.84

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

surface tension
dynamic viscosity
kinematic viscosity
pressure

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Hydraulics and Fluid Mechanics in ME
A body floats in stable equilibrium

Metacentre has nothing to do with position of e.g. for determining stability
When its e.g. is below its center of buoyancy
When the metacentre is above e.g.
When its meatcentric height is zero

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

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Hydraulics and Fluid Mechanics in ME
The velocity distribution for laminar flow through a circular tube

is constant over the cross-section
varies linearly from zero at walls to maximum at centre
varies parabolically with maximum at the centre
None of these

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Hydraulics and Fluid Mechanics in ME
The loss of pressure head in case of laminar flow is proportional to

(Velocity)2
Velocity
(Velocity)3
(Velocity)4

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