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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The ratio of the normal force of jet of water on a plate inclined at an angle of 30° as compared to that when the plate is normal to jet, is

√2
43832
1/√2
1

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Hydraulics and Fluid Mechanics in ME
The Newton's law of resistance is based on the assumption that the

Space around the body is completely filled with the fluid
All of these
Fluid particles do not exert any influence on one another
Planes of the body are completely smooth

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

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

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Hydraulics and Fluid Mechanics in ME
Dynamic viscosity of most of the liquids with rise in temperature

Remain unaffected
Unpredictable
Decreases
Increases

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Hydraulics and Fluid Mechanics in ME
The speed ratio in case of Francis turbine varies from

0.15 to 0.3
0.6 to 0.9
1 to 1.5
0.4 to 0.5

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Hydraulics and Fluid Mechanics in ME
The efficiency of a hydraulic press is given by (where W = Weight lifted by ram, P = Force applied on plunger, A = Area of ram, and a = Area of plunger)

(p/W) × (a/A)
(p/W) × (A/a)
(W/p) × (A/a)
(W/p) × (a/A)

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