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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Hydrometer is used to determine

specific gravity of gases
relative humidity
specific gravity of solids
specific gravity of liquids

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Hydraulics and Fluid Mechanics in ME
A flow is called super-sonic if the

Velocity of flow is very high
Mach number is between 1 and 6
None of these
Discharge is difficult to measure

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Hydraulics and Fluid Mechanics in ME
The total pressure on an immersed surface inclined at an angle θ with the liquid surface is

wAx
wAx/sinθ
wx
wA

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Hydraulics and Fluid Mechanics in ME
In a Kaplan turbine runner, the numbers of blades are generally between

2 to 4
8 to 16
16 to 24
4 to 8

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Hydraulics and Fluid Mechanics in ME
Reciprocating pumps are no more to be seen in industrial applications (in comparison to centrifugal pumps) because of

Necessity of air vessel
Lower discharge
High initial and maintenance cost
Lower speed of operation

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Hydraulics and Fluid Mechanics in ME
The atmospheric pressure with rise in altitude decreases

linearly
unpredictable
first slowly and then steeply
first steeply and then gradually

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