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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Coefficient of discharge for a totally submerged orifice as compared to that for an orifice discharging free is

slightly less
equal
nearly half
slightly more

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Hydraulics and Fluid Mechanics in ME
Two pipe systems can be said to be equivalent, when the following quantities are same

Friction factor and diameter
Flow and length
Friction loss and flow
Length and diameter

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Hydraulics and Fluid Mechanics in ME
According to fan laws, at constant weight of air or gas, the speed, capacity and pressure vary

Inversely as density
Inversely as square root of density
As square of density
Directly as the air or gas density

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Hydraulics and Fluid Mechanics in ME
Fluid is a substance which offers no resistance to change of

Shape
Flow
Pressure
Volume

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Hydraulics and Fluid Mechanics in ME
The pressure of liquid at throat in a Venturimeter is __________ than that at inlet.

Higher
Same
None of these
Lower

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Hydraulics and Fluid Mechanics in ME
For centrifugal pump impeller, the maximum value of the vane exit angle is

10° to 15°
25° to 30°
20° to 25°
15° to 20°

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