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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The highest efficiency is obtained with a channel of __________ section.

Rectangular
Square
Trapezoidal
Circular

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Hydraulics and Fluid Mechanics in ME
The body will sink down if the force of buoyancy is __________ the weight of the liquid displaced.

Equal to
Less than
More than
None of these

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Hydraulics and Fluid Mechanics in ME
Power required (in watts) to drive a centrifugal pump is (where Hm = Manometric head in metres, w = Specific weight in N/m3, Q = Discharge of the pump in m3/s, and ηo = Overall efficiency of the pump)

(w Q) / (Hm × ηo)
(w Q ηo) / Hm
(w Hm Q) / ηo
(w Hm) / (Q × ηo)

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Hydraulics and Fluid Mechanics in ME
The siphon will work satisfactorily, if the minimum pressure in the pipe is __________ vapour pressure of liquid.

More than
None of these
Less than
Equal to

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Hydraulics and Fluid Mechanics in ME
Indicator diagram of a reciprocating pump is a graph between

Pressure in cylinder vs. swept volume
Flow vs. speed
Pressure vs. speed
Flow vs. swept volume

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Hydraulics and Fluid Mechanics in ME
The jet ratio is defined as the ratio of the

Velocity of Pelton wheel to the velocity of jet
Velocity of jet to the velocity of Pelton wheel
Diameter of jet to the diameter of Pelton wheel
Diameter of Pelton wheel to the diameter of jet

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