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Hydraulics and Fluid Mechanics in ME

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

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

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Hydraulics and Fluid Mechanics in ME
The total pressure on the top of a closed cylindrical vessel completely filled up with a liquid is

Inversely proportional to (radius)2
Directly proportional to (radius)2
Directly proportional to (radius)4
Inversely proportional to (radius)4

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Hydraulics and Fluid Mechanics in ME
The centrifugal pump preferred for a specific speed between 80 to 160 r.p.m. is

High speed with radial flow at outlet
Slow speed with radial flow at outlet
High speed with mixed flow at outlet
Medium speed with radial flow at outlet

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Hydraulics and Fluid Mechanics in ME
The resultant upward pressure of a fluid on a floating body is equal to the weight of the fluid displaced by the body. This definition is according to

Bernoulli’s theorem
Equilibrium of a floating body
Archimedes’ principle
Buoyancy

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

law of gravitation
principle of buoyancy
All of these
Archimedes principle

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Hydraulics and Fluid Mechanics in ME
The coefficient of viscosity may be determined by

Capillary tube method
Orifice type viscometer
Rotating cylinder method
All of these

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