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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The width of the bucket for a Pelton wheel is generally ________ the diameter of jet.

Four times
Three times
Five times
Double

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Hydraulics and Fluid Mechanics in ME
The specific speed (Ns) of a centrifugal pump is given by

(N√Q)/H2/3
(N√Q)/H5/4
(N√Q)/H
(N√Q)/H3/4

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Hydraulics and Fluid Mechanics in ME
The relation between hydraulic efficiency (ηh), mechanical efficiency (ηm) and overall efficiency (ηo) is

ηo = ηh × ηm
None of these
ηh = ηo × ηm
ηm = ηm × ηh

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Hydraulics and Fluid Mechanics in ME
A double overhung Pelton wheel has

Four jets
Two runners
Two jets
Four runners

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Hydraulics and Fluid Mechanics in ME
A water tank contains 1.3 m deep water. The pressure exerted by the water per metre length of the tank is

9.28 kN
28.9 kN
8.29 kN
2.89 kN

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Hydraulics and Fluid Mechanics in ME
For hypersonic flow, the Mach number is

unity
greater than unity
greater than 4
greater than 2

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