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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
An object having 10 kg mass weighs 9.81kg on a spring balance. The value of ‘g’ at this place is

10.2/m sec
9.81 m/sec²
10m/sec²
9.75 m/sec²

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Hydraulics & Fluid Mechanics
The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at the centriod, if

the area is vertical
the area is horizontal
the area is inclined
All of these

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Hydraulics & Fluid Mechanics
According to the principle of buoyancy a body totally or partially immersed in a fluid will be lifted up by a force equal to

more than the weight of the body
less than the weight of the body
the weight of the body
weight of the fluid displaced by the body

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Hydraulics & Fluid Mechanics
A perfect gas

has constant viscosity
is of theoretical interest
is incompressible
None of these

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Hydraulics & Fluid Mechanics
Mercury is often used in barometer because

it is the best liquid
its vapour pressure is so low that it may be neglected
the height of barometer will be less
both (B) and (C)

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Hydraulics & Fluid Mechanics
The flow which neglects changes in a transverse direction is known as

one dimensional flow
steady flow
uniform flow
turbulent flow

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