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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Indicator diagram of a reciprocating pump is a graph between

Flow vs. speed
Pressure in cylinder vs. swept volume
Flow vs. swept volume
Pressure vs. speed

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Hydraulics and Fluid Mechanics in ME
The ratio of specific weight of a liquid to the specific weight of pure water at a standard temperature is called

Surface tension of liquid
Specific gravity of liquid
Density of liquid
Compressibility of liquid

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Hydraulics and Fluid Mechanics in ME
The specific weight of water in S.I. units is taken as

9.81 × 103 N/m3
Any one of these
9.81 kN/m3
9.81 × 10-6 N/mm3

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Hydraulics and Fluid Mechanics in ME
The center of pressure of a surface subjected to fluid pressure is the point

on the surface at which resultant pres-sure acts
on the surface at which gravitational force acis
similar to metacentre
at which all hydraulic forces meet

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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

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

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Hydraulics and Fluid Mechanics in ME
The unit power developed by a turbine is (where P = Power developed by the turbine under a head of water (H).

P/ H²
P/ H3/2
P/ √H
P/ H

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