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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The unit power developed by a turbine is (where P = Power developed by the turbine under a head of water (H).

P/ H²
P/ H3/2
P/ √H
P/ H

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Hydraulics and Fluid Mechanics in ME
High specific speed of turbine implies it is

Impulse turbine
Propeller turbine
Francis turbine
None of the listed here

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Hydraulics and Fluid Mechanics in ME
The maximum hydraulic efficiency of an impulse turbine is (where φ = Angle of blade tip at outlet)

(1 - sin φ)/2
(1 + cos φ)/2
(1 + sin φ)/2
(1 - cos φ)/2

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Hydraulics and Fluid Mechanics in ME
The loss of head at entrance in a pipe is (where v = Velocity of liquid in the pipe)

0.75v²/2g
0.5v²/2g
v²/2g
0.375v²/2g

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Hydraulics and Fluid Mechanics in ME
A body floating in a liquid is said to be in neutral equilibrium, if its metacentre

Coincides with its centre of gravity
Lies between the centre of buoyancy and centre of gravity
Lies above its centre of gravity
Lies below its centre of gravity

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Hydraulics and Fluid Mechanics in ME
A hemispherical tank of radius (R) has an orifice of cross-sectional area (a) at its bottom and is full of liquid. The time required to empty the tank completely is

14π R7/2/15Cd × a √(2g)
14π R5/2/15Cd × a √(2g)
14π R1/2/15Cd × a √(2g)
14π R3/2/15Cd × a √(2g)

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MORE MCQ ON Hydraulics and Fluid Mechanics in ME

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