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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a

Notch
Mouthpiece
Weir
Nozzle

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Hydraulics and Fluid Mechanics in ME
If the surface of liquid is convex, men

Cohesion pressure is increased
Cohesion pressure is decreased
Cohesion pressure is negligible
There is no cohesion pressure

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Hydraulics and Fluid Mechanics in ME
According to Bernoulli's equation

Z - p/w + v²/2g = constant
Z + p/w + v²/2g = constant
Z - p/w - v²/2g = constant
Z + p/w - v²/2g = constant

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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)

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

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Hydraulics and Fluid Mechanics in ME
The hydraulic mean depth or the hydraulic radius is the ratio of

Wetted perimeter and diameter of pipe
Area of flow and wetted perimeter
None of these
Velocity of flow and area of flow

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Hydraulics and Fluid Mechanics in ME
A balloon lifting in air follows the following principle

All of these
principle of buoyancy
Archimedes principle
law of gravitation

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