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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Re-entrant or Borda's mouthpiece is an __________ mouthpiece.

Both A and B
External
None of these
Internal

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Hydraulics and Fluid Mechanics in ME
The resultant upward pressure of the fluid on an immersed body due to its tendency to uplift the submerged body is called

Up-thrust
Reaction
Buoyancy
Metacentre

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Hydraulics and Fluid Mechanics in ME
The maximum hydraulic efficiency of an impulse turbine is (where φ = Angle of blade tip at outlet)

(1 - cos φ)/2
(1 + sin φ)/2
(1 + cos φ)/2
(1 - sin φ)/2

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Hydraulics and Fluid Mechanics in ME
In case of an airfoil, the separation of flow occurs

at the extreme front of body
at the extreme rear of body
any where between rear and front of body depending upon Reynolds number
midway between rear and front of body

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Hydraulics and Fluid Mechanics in ME
Power required (in watts) to drive a centrifugal pump is (where Hm = Manometric head in metres, w = Specific weight in N/m3, Q = Discharge of the pump in m3/s, and ηo = Overall efficiency of the pump)

(w Q) / (Hm × ηo)
(w Hm) / (Q × ηo)
(w Hm Q) / ηo
(w Q ηo) / Hm

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Hydraulics and Fluid Mechanics in ME
The liquid used in manometers should have

High surface tension
Low density
High density
Low surface tension

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