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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The number of buckets on the periphery of a Pelton wheel is given by

(D/2d) + 10
(D/2d) + 20
(D/2d) + 5
(D/2d) + 15

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Hydraulics and Fluid Mechanics in ME
The type of centrifugal pump preferred for a specific speed of 20 r.p.m. is

High speed pump with axial flow at outlet
High speed pump with radial flow at outlet
Slow speed pump with radial flow at outlet
Medium speed pump with radial flow at outlet

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Hydraulics and Fluid Mechanics in ME
The capillary rise at 20°C in a clean glass tube of 1 mm bore containing water is approximately

10 mm
30 mm
20 mm
5 mm

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Hydraulics and Fluid Mechanics in ME
The hydraulic efficiency of an impulse turbine is maximum when velocity of wheel is _______ of the jet velocity,

One-fourth
One-half
Three-fourth
Double

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Hydraulics and Fluid Mechanics in ME
According to Chezy's formula, the discharge through an open channel is (where A = Area of flow, C = Chezy's constant, m = Hydraulic mean depth, and i = Uniform slope in bed)

A × √(m × i)
mi × √(A × C)
C × √(m × i)
AC × √(m × i)

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Hydraulics and Fluid Mechanics in ME
A flow is called sub-sonic, if the Mach number is

Unity
Less than unity
More than 6
Between 1 and 6

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