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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The imaginary line drawn in the fluid in such a way that the tangent to any point gives the direction of motion at that point, is known as

Steak line
Path line
Potential line
Stream line

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Hydraulics and Fluid Mechanics in ME
The stress-strain relation of the newtoneon fluid is

inverse type
hyperbolic
linear
parabolic

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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 kN/m3
9.81 × 10-6 N/mm3

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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.)

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

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Hydraulics and Fluid Mechanics in ME
Center of buoyancy is the

does not exist
center of pressure of displaced volume
e.g. of floating body
centroid of the displaced volume of fluid

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Hydraulics and Fluid Mechanics in ME
Guide angle as per the aerofoil theory of Kaplan turbine blade design is defined as the angle between

Drag and resultant force
Lift and tangential force
Lift and resultant force
Lift and drag

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