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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
For manometer, a better liquid combination is one having

high density and viscosity
higher surface tension
surface tension is no criterion
lower surface tension

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Hydraulics and Fluid Mechanics in ME
Head developed by a centrifugal pump depends on

Both (A) and (B) above
Fluid density
Speed
Impeller diameter

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Hydraulics and Fluid Mechanics in ME
The absolute pressure is equal to

Gauge pressure + atmospheric pressure
Gauge pressure - vacuum pressure
Atmospheric pressure - gauge pressure
Gauge pressure - atmospheric pressure

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Hydraulics and Fluid Mechanics in ME
Specific speed for reaction turbines ranges from

250 to 300
0 to 4.5
80 to 200
10 to 100

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Hydraulics and Fluid Mechanics in ME
According to Bazin's formula, the discharge over a rectangular weir is mL2g x H3/2 where m is equal to

0.003 + (0.405/H)
0.003 + (H/0.405)
0.405 + (0.003/H)
0.405 + (H/0.003)

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Hydraulics and Fluid Mechanics in ME
If the dynamic viscosity of a fluid is 0.5 poise and specific gravity is 0.5, then the kinematic viscosity of that fluid in stokes is

1
0.5
None of these
0.25

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