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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The property of fluid by virtue of which it offers resistance to shear is called

adhesion
cohesion
viscosity
surface tension

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Hydraulics and Fluid Mechanics in ME
The width of the bucket for a Pelton wheel is generally ________ the diameter of jet.

Five times
Four times
Double
Three times

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Hydraulics and Fluid Mechanics in ME
Viscosity of water in comparison to mercury is

Same
Lower
Higher/lower depending on temperature
Higher

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Hydraulics and Fluid Mechanics in ME
A flow through a long pipe at decreasing rate is called __________ uniform flow.

Steady
Unsteady
None of these
Both A and B

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Hydraulics and Fluid Mechanics in ME
The length AB of a pipe ABC in which the liquid is flowing has diameter (d1) and is suddenly contracted to diameter (d2) at B which is constant for the length BC. The loss of head due to sudden contraction, assuming coefficient of contraction as 0.62, is

0.5 v₁²/2g
0.375 v₂²/2g
v₁²/2g
v₂²/2g

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Hydraulics and Fluid Mechanics in ME
The value of the coefficient of compressibility for water at ordinary pressure and temperature in kg/cm is equal to

10000
2700
2100
21000

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