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Hydraulics and Fluid Mechanics in ME

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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Hydraulics and Fluid Mechanics in ME
Euler's equation in the differential form for the motion of liquids is given by

ρ.dp + g.dz + v.dv = 0
dp/ρ + g.dz + v.dv = 0
dp/ρ - g.dz + v.dv = 0
ρ.dp - g.dz + v.dv = 0

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Hydraulics and Fluid Mechanics in ME
The mass per unit volume of a liquid at a standard temperature and pressure is called

None of these
Specific gravity
Specific weight
Mass density

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Hydraulics and Fluid Mechanics in ME
Axial flow pump is started with its delivery valve

Kept fully closed
Kept fully open
Kept 50% open
Irrespective of any position

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Hydraulics and Fluid Mechanics in ME
Fluid is a substance which offers no resistance to change of

Flow
Volume
Shape
Pressure

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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

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

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