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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
When a piping system is made up primarily of vertical lift and very little pipe friction, the pump characteristics should be

First rise and then fall
Nearly horizontal
Steep
Horizontal

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Hydraulics and Fluid Mechanics in ME
When the Mach number is between ___ the flow is called super-sonic flow.

2.5 and 4
1 and 2.5
1 and 6
4 and 6

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Hydraulics and Fluid Mechanics in ME
The force exerted (in Newton) by a jet of water impinging normally on a fixed plate is (where w = Specific weight of water in N/m3, a = Cross-sectional area of jet in m², and V = Velocity of jet in m/s)

waV / g
waV² / g
waV / 2g
waV² / 2g

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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
Lower speed of operation
High initial and maintenance cost

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Hydraulics and Fluid Mechanics in ME
The angle of contact in case of a liquid depends upon

the material which exists above the free surface of the liquid
the nature of the liquid and the solid
any one of the above
both of die above

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Hydraulics and Fluid Mechanics in ME
The pressure of a liquid measured with the help of a Piezometer tube is

Atmospheric pressure
Absolute pressure
Vacuum pressure
Gauge pressure

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