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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The major loss of energy in long pipes is due to

sudden enlargement
friction
sudden contraction
gradual contraction or enlargement

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Hydraulics and Fluid Mechanics in ME
Coefficient of discharge Cd is equal to (where Cc = Coefficient of contraction, Cv = Coefficient of velocity, and Cr = Coefficient of resistance)

Cc × Cr
Cv × Cr
Cc × Cv
Cc/Cr

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Hydraulics and Fluid Mechanics in ME
The dynamic viscosity of the liquid __________ with rise in temperature.

Decreases
None of these
Increases
Remain unaffected

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

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

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Hydraulics and Fluid Mechanics in ME
A weir is said to be narrow-crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest.

More than
None of these
Equal to
Less than

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

0.97
0.62
0.84
0.76

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