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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The eddy viscosity for turbulent flow is

independent of the flow
dependent on the flow
a function of temperature only
a physical property of the fluid.

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Hydraulics and Fluid Mechanics in ME
Theoretical power required (in watts) to drive a reciprocating pump is (where w = Specific weight of liquid to be pumped in N/m3, Q = Discharge of the pump in m3/s, Hs = Suction head in meters, and Hd = Delivery head in meters)

wQHs
wQ (Hs + Hd)
wQHd
wQ (Hs - Hd)

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Hydraulics and Fluid Mechanics in ME
Specific speed for reaction turbines ranges from

0 to 4.5
10 to 100
80 to 200
250 to 300

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Hydraulics and Fluid Mechanics in ME
The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as

center of buoyancy
metacentre
center of gravity
center of pressure

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Hydraulics and Fluid Mechanics in ME
When a cylindrical vessel containing liquid is resolved, the surface of the liquid takes the shape of

None of these
An ellipse
A paraboloid
A triangle

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Hydraulics and Fluid Mechanics in ME
A vessel of 4 m3 contains oil which weighs 30 kN. The specific weight of the oil is

7.5 kN/m3
10 kN/m3
6 kN/m3
4.5 kN/m3

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