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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The velocity corresponding to Reynold number of 2000 is called

Lower critical velocity
Super-sonic velocity
Sub-sonic velocity
Higher critical velocity

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Hydraulics and Fluid Mechanics in ME
A turbine develops 10000 kW under a head of 25 meters at 135 r.p.m. Its specific speed is

175.4 r.p.m.
215.5 r.p.m.
275.4 r.p.m
241.5 r.p.m.

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Hydraulics and Fluid Mechanics in ME
The specific speed of a hydraulic turbine depends upon

Discharge and power developed
Speed, power developed and head of water
Speed and head of water
Speed and power developed

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Hydraulics and Fluid Mechanics in ME
The depth of center of pressure of an immersed surface, inclined at an angle 'θ' with the liquid surface lies at a distance equal to __________ the center of gravity.

IG sinθ/Ax̅ above
IG sin²θ/Ax̅ above
IG sinθ/Ax̅ below
IG sin²θ/Ax̅ below

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Hydraulics and Fluid Mechanics in ME
The efficiency of a hydraulic press is given by (where W = Weight lifted by ram, P = Force applied on plunger, A = Area of ram, and a = Area of plunger)

(p/W) × (A/a)
(W/p) × (a/A)
(W/p) × (A/a)
(p/W) × (a/A)

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Hydraulics and Fluid Mechanics in ME
Low specific speed of a pump implies it is

None of these
Axial flow pump
Centrifugal pump
Mixed flow pump

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