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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Which of the following pump is successfully used for lifting water to the turbines?

Air lift pump
Jet pump
Centrifugal pump
Reciprocating pump

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Hydraulics and Fluid Mechanics in ME
The centrifugal pump preferred for a specific speed between 80 to 160 r.p.m. is

High speed with mixed flow at outlet
High speed with radial flow at outlet
Slow speed with radial flow at outlet
Medium speed with radial flow at outlet

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Hydraulics and Fluid Mechanics in ME
Mercury does not wet glass. This is due to property of liquid known as

viscosity
cohesion
surface tension
adhesion

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Hydraulics and Fluid Mechanics in ME
The hydraulic gradient line lies over the centre line of the pipe by an amount equal to the

Pressure head + velocity head
Velocity head
Pressure head - velocity head
Pressure head

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Hydraulics and Fluid Mechanics in ME
When the Mach number is less than unity, the flow is called

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

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Hydraulics and Fluid Mechanics in ME
Which of the following hydraulic unit is used for transmitting increased or decreased torque to the driven shaft?

Hydraulic accumulator
Hydraulic intensifier
Hydraulic torque converter
Hydraulic ram

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