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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.)

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

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Hydraulics and Fluid Mechanics in ME
Power required to drive a centrifugal pump is directly proportional to _________ of its impeller.

Cube of diameter
Diameter
Fourth power of diameter
Square of diameter

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Hydraulics and Fluid Mechanics in ME
To avoid an interruption in the flow of a siphon, an air vessel is provided

At any point between inlet and outlet
At the inlet
At the outlet
At the summit

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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)

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

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Hydraulics and Fluid Mechanics in ME
The diameter of the nozzle (d) for maximum transmission of power is given by (where D = Diameter of pipe, f = Darcy’s coefficient of friction for pipe, and l = Length of pipe)

d = (D⁵/8fl)1/5
d = (D⁵/8fl)1/2
d = (D⁵/8fl)1/4
d = (D⁵/8fl)1/3

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Hydraulics and Fluid Mechanics in ME
The specific weight of water is 1000 kg/m3

All of the listed here
At mean sea level
At normal pressure of 760 mm
At 4°C temperature

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