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Hydraulics and Fluid Mechanics in ME

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

law of gravitation
principle of buoyancy
Archimedes principle
All of these

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Hydraulics and Fluid Mechanics in ME
Viscous force is the __________ of shear stress due to viscosity and cross-section area of flow.

Sum
Ratio
Product
Different

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Hydraulics and Fluid Mechanics in ME
The water in a jet propelled boat is drawn through the openings facing the direction of motion of the boat. The efficiency of propulsion is given by

2V/(vr + v)
V/(vr - v)
2V/(vr - v)
V/(vr + v)

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Hydraulics and Fluid Mechanics in ME
When the Mach number is more than 6, the flow is called

Sonic flow
Sub-sonic flow
Super-sonic flow
Hyper-sonic flow

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Hydraulics and Fluid Mechanics in ME
The specific weight of water in S.I. units is taken as

9.81 × 103 N/m3
Any one of these
9.81 × 10-6 N/mm3
9.81 kN/m3

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Hydraulics and Fluid Mechanics in ME
Center of pressure on an inclined plane is

At metacentre
At the Centroid
Above the Centroid
Below the Centroid

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