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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The discharge of a double acting reciprocating pump is (where L = Length of stroke, A = Cross-sectional area of piston, and N = Speed of crank in r.p.m.)

(L.A.N)/60
L.A.N
2 L.A.N
(2 L.A.N)/60

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Hydraulics and Fluid Mechanics in ME
General energy equation holds for

non-uniform flow
turbulent flow
laminar flow
steady flow

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

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

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Hydraulics and Fluid Mechanics in ME
A flow in which __________ force is dominating over the viscosity is called turbulent flow.

Inertia
Elastic
Viscous
Surface tension

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Hydraulics and Fluid Mechanics in ME
A large Reynold number is indication of

Steady flow
Smooth and streamline flow
Laminar flow
Highly turbulent flow

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Hydraulics and Fluid Mechanics in ME
If V1 and V2 are the velocities of water at inlet and outlet of the draft tube respectively, then the efficiency of a draft tube is

(V­1 - V2) / V1
V1² / (V1² - V2²)
V1 / (V1 - V2)
(V­1² - V2²) / V1²

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