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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The variation in the volume of a liquid with the variation of pressure is called its

Surface tension
Capillarity
Compressibility
Viscosity

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Hydraulics and Fluid Mechanics in ME
A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to empty the tank completely will be

(2A√H₁)/(Cd × a√2g)
(2AH₁3/2)/(Cd × a√2g)
(2AH₁)/(Cd × a√2g)
(2AH₁²)/(Cd × a√2g)

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Hydraulics and Fluid Mechanics in ME
The pressure measured with the help of a pressure gauge is called

Absolute pressure
Mean pressure
Gauge pressure
Atmospheric pressure

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Hydraulics and Fluid Mechanics in ME
The velocity corresponding to Reynold number of 2800, is called

Higher critical velocity
Super-sonic velocity
Sub-sonic velocity
Lower critical velocity

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Hydraulics and Fluid Mechanics in ME
The angle of taper on draft tube is

Greater than 5°
Greater than 15°
Less than 8°
Greater than 8°

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Hydraulics and Fluid Mechanics in ME
Principle of similitude forms the basis of

designing models so that the result can be converted to prototypes
comparing similarity between design and actual equipment
hydraulic designs
comparing two identical equipments

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