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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Hydrometer is used to determine

specific gravity of liquids
specific gravity of gases
specific gravity of solids
relative humidity

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Hydraulics and Fluid Mechanics in ME
The power transmitted through the pipe is maximum when the head lost due to friction is equal to

One-half of the total supply head
One-third of the total supply head
One-fourth of the total supply head
Two-third of the total supply head

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Hydraulics and Fluid Mechanics in ME
Liquids

Are not affected by change in pressure and temperature
Occupy definite volume
None of the listed here
Cannot be compressed

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Hydraulics and Fluid Mechanics in ME
In a reciprocating pump, air vessels are used to

Reduce suction head
Smoothen the flow
Reduce acceleration head
Increase delivery head

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Hydraulics and Fluid Mechanics in ME
The distance y from pipe boundary, at which the point velocity is equal to average velocity for turbulent flow, is (where R is radius of pipe)

0.423 R
0.577 R
0.707 R
0.223 R

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Hydraulics and Fluid Mechanics in ME
Liquids transmit pressure equally in all the directions. This is according to

Boyle's law
Newton's formula
Archimedes principle
Pascal's law

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