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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
Pressure of the order of 10''' torr can be measured by

Micro-manometer
Pirani Gauge
ionisastion gauge
Bourdon tube

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Hydraulics & Fluid Mechanics
The surface tension of mercury at normal temperature compared to that of water is

more
more or less depending on size of glass tube
same
less

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Hydraulics & Fluid Mechanics
The peoperty by virtue of which a liquid opposes relative motion between its different layers is called

co-efficient of viscosity
surface tension
viscosity
osmosis

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Hydraulics & Fluid Mechanics
For a sphere of radius 15 cm moving with a uniform velocity of 2 m/sec through a liquid of specific gravity 0.9 and dynamic viscosity 0.8 poise, the Reynolds number will be

337.5
675
300
600

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Hydraulics & Fluid Mechanics
Uniform flow occurs when

size and shape of the cross section in a particular length remain constant
the flow is steady
size and cross section change uniformly along length
the flow is streamline

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Hydraulics & Fluid Mechanics
A bucket of water is hanging from a spring balance. An iron piece is suspended into water without touching sides of bucket from another support. The spring balance reading will

remain same
increase/decrease depending on depth of immersion
increase
decrease

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