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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The value of coefficient of discharge is __________ the value of coefficient of velocity.

None of these
Same as
More than
Less than

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Hydraulics and Fluid Mechanics in ME
Head developed by a centrifugal pump depends on

Impeller diameter
Fluid density
Speed
Both (A) and (B) above

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Hydraulics and Fluid Mechanics in ME
The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a rectangular notch is given by

dQ/Q = (3/4) × (dH/H)
dQ/Q = (1/2) × (dH/H)
dQ/Q = (3/2) × (dH/H)
dQ/Q = (dH/H)

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Hydraulics and Fluid Mechanics in ME
Center of pressure on an inclined plane is

Above the Centroid
At metacentre
At the Centroid
Below the Centroid

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Hydraulics and Fluid Mechanics in ME
The optimum value of vane exit angle for a centrifugal pump impeller is

20-25°
30-40°
50-60°
10-15°

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Hydraulics and Fluid Mechanics in ME
Discharge of a centrifugal pump is (where N = Speed of the pump impeller)

Directly proportional to N²
Inversely proportional to N²
Inversely proportional to N
Directly proportional to N

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