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

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Hydraulics and Fluid Mechanics in ME
The power transmitted through a pipe is (where w = Specific weight in N/m3, and Q = Discharge in m3/s)

w × Q (H + hf)
w × Q × H
w × Q (H - hf)
w × Q × hf

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

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

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Hydraulics and Fluid Mechanics in ME
A flow in which the volume of a fluid and its density does not change during the flow is called _________ flow.

Compressible
None of these
Viscous
Incompressible

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Hydraulics and Fluid Mechanics in ME
The discharge over the trapezoidal notch is equal to the discharge over the rectangular notch __________ the discharge over the triangular notch.

Minus
Plus
None of these
Divide

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Hydraulics and Fluid Mechanics in ME
The optimum value of vane exit angle for a centrifugal pump impeller is

30-40°
20-25°
10-15°
50-60°

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