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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Multistage centrifugal pumps are used to

Produce high heads
Give high discharge
Pump viscous fluids
All of these

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Hydraulics and Fluid Mechanics in ME
A streamline is defined as the line

along which the pressure drop is uniform
parallel to central axis flow
of equal yelocity in a flow
parallel to outer surface of pipe

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Hydraulics and Fluid Mechanics in ME
Liquids transmit pressure equally in all the directions. This is according to

Pascal's law
Newton's formula
Archimedes principle
Boyle's law

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Hydraulics and Fluid Mechanics in ME
A turbine develops 10000 kW under a head of 25 meters at 135 r.p.m. Its specific speed is

215.5 r.p.m.
175.4 r.p.m.
241.5 r.p.m.
275.4 r.p.m

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

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Hydraulics and Fluid Mechanics in ME
The flow of water through the hole in the bottom of a wash basin is an example of

Forced vortex
Free vortex
Uniform flow
Steady flow

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MORE MCQ ON Hydraulics and Fluid Mechanics in ME

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