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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A centrifugal pump will start delivering liquid only when the pressure rise in the impeller is equal to the

Velocity head
Manometric head
Kinetic head
Static head

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Hydraulics and Fluid Mechanics in ME
A Pelton wheel develops 1750 kW under a head of 100 meters while running at 200 r.p.m. and discharging 2500 liters of water per second. The unit speed of the wheel is

80 r.p.m.
10 r.p.m.
40 r.p.m.
20 r.p.m.

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Hydraulics and Fluid Mechanics in ME
The most economical section of a rectangular channel is one which has hydraulic mean depth or hydraulic radius equal to

Twice the breadth
Half the breadth
Half the depth
Twice the depth

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Hydraulics and Fluid Mechanics in ME
The depth ā€˜d’ below the free surface at which the point velocity is equal to the average velocity of flow for a uniform laminar flow with a free surface, will be (where D is the depth of flow)

0.577 D
0.223 D
0.707 D
0.423 D

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Hydraulics and Fluid Mechanics in ME
Which of the following is dimensionless?

Specific volume
Specific speed
Specific gravity
Specific weight

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Hydraulics and Fluid Mechanics in ME
When a tank containing liquid moves with an acceleration in the horizontal direction, then the free surface of the liquid

Falls on the front end
Becomes curved
Falls on the back end
Remains horizontal

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