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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A vertically immersed surface is shown in the below figure. The distance of its centre of pressure from the water surface is

(bd²/12) + x̅
b²/12 + x̅
(d²/12 x̅) + x̅
d²/12 + x̅

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Hydraulics and Fluid Mechanics in ME
The discharge through a reaction turbine with increase in unit speed

Increases
First increases and then decreases
Decreases
Remain unaffected

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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

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

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Hydraulics and Fluid Mechanics in ME
The two important forces for a floating body are

inertial, gravity
buoyancy, pressure
buoyancy, gravity
buoyancy, inertial

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Hydraulics and Fluid Mechanics in ME
The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as

center of pressure
center of gravity
center of buoyancy
metacentre

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Hydraulics and Fluid Mechanics in ME
The discharge through a convergent mouthpiece is __________ the discharge through an internal mouthpiece of the same diameter and head of water.

Double
One-half
Equal to
Three fourth

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