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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
The Prartdtl mixing length is

zero at the pipe wall
maximum at the pipe wall
independent of shear stress
None of these

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Hydraulics & Fluid Mechanics
Separation of flow occurs when

the cross-section of a channel is reduced
the pressure intensity reaches a minimum
the boundary layer comes to rest
All of these

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Hydraulics & Fluid Mechanics
The pressure in Pascals at a depth of 1 m below the free surface of a body of water will be equal to

981 PA
1 PA
9810 PA
91 PA

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Hydraulics & Fluid Mechanics
If a sphere of diameter 1 cm falls in castor oil of kinematic viscosity 10 stokes, with a terminal velocity of 1.5 cm/sec, the coefficient of drag on the sphere is

less than 1
160
between 1 and 100
200

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Hydraulics & Fluid Mechanics
Two pipe systems are said to be equivalent when

length of pipe and discharge are same in two systems
friction factor and length are same in two systems
head loss and discharge are same in two systems
length and diameter are same in two systems

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Hydraulics & Fluid Mechanics
Operation of McLeod gauge used for low pressure measurement is based on the principle of

Boyle’s law
Pascal’s law
gas law
Charle’s law

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