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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The kinematic viscosity of an oil (in stokes) whose specific gravity is 0.95 and viscosity 0.011 poise, is

0.116 stoke
0.0611 stoke
0.0116 stoke
0.611 stoke

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Hydraulics and Fluid Mechanics in ME
A glass tube of small diameter (d) is dipped in fluid. The height of rise or fall in the tube given by (where w = Specific weight of liquid, α = Angle of contact of the liquid surface, and σ = Surface tension)

σ cosα/4wd
4σ cosα/wd
4wd/σ cosα
wd/4σ cosα

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Hydraulics and Fluid Mechanics in ME
Unit of surface tension is

Both of the above
Velocity/unit area
Energy/unit area
It has no units

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

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Hydraulics and Fluid Mechanics in ME
The specific weight of water in S.I. units is taken as

Any one of these
9.81 × 103 N/m3
9.81 × 10-6 N/mm3
9.81 kN/m3

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Hydraulics and Fluid Mechanics in ME
Indicator diagram of a reciprocating pump is a graph between

Pressure in cylinder vs. swept volume
Flow vs. speed
Pressure vs. speed
Flow vs. swept volume

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