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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The Fourneyron turbine is _________ reaction turbine.

A mixed flow
An inward flow
An axial flow
An outward flow

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Hydraulics and Fluid Mechanics in ME
The relation between hydraulic efficiency (ηh), mechanical efficiency (ηm) and overall efficiency (ηo) is

None of these
ηm = ηm × ηh
ηh = ηo × ηm
ηo = ηh × ηm

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Hydraulics and Fluid Mechanics in ME
Froude's number is the ratio of inertia force to

Pressure force
Surface tension force
Elastic force
Gravity force

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Hydraulics and Fluid Mechanics in ME
The wake

always occurs after a separation point
always occurs before a separation point
is a region of high pressure intensity
None of these

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Hydraulics and Fluid Mechanics in ME
A hydraulic accumulator normally consists of

A cylinder and a ram
A cylinder, a piston, storage tank and control valve
Two cylinders, two rams and a storage device
Two coaxial rams and two cylinders

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Hydraulics and Fluid Mechanics in ME
Rain drops are spherical because of

atmospheric pressure
air resistance
surface tension forces
viscosity

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