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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The specific speed of a centrifugal pump, delivering 750 liters of water per second against a head of 15 meters at 725 r.p.m., is

82.4 r.p.m.
248 r.p.m
48.2 r.p.m
24.8 r.p.m.

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Hydraulics and Fluid Mechanics in ME
For laminar flow in circular pipes, the Darcy’s friction factor f is equal to

16/Re
32/ Re
None of these
64/ Re

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Hydraulics and Fluid Mechanics in ME
A turbine develops 10000 kW under a head of 25 meters at 135 r.p.m. Its specific speed is

275.4 r.p.m
175.4 r.p.m.
241.5 r.p.m.
215.5 r.p.m.

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Hydraulics and Fluid Mechanics in ME
Whenever a plate is held immersed at some angle with the direction of flow of the liquid, it is subjected to some pressure. The component of this pressure, in the direction of flow of the liquid, is known as

Drag
Lift
Stagnation pressure
Bulk modulus

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Hydraulics and Fluid Mechanics in ME
A piece weighing 3 kg in air was found to weigh 2.5 kg when submerged in water. Its specific gravity is

1
6
5
7

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Hydraulics and Fluid Mechanics in ME
The ratio of actual work available at the turbine to the energy imparted to the wheel is known as ________ efficiency.

None of these
Mechanical
Hydraulic
Overall

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