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Fluid Mechanics

Fluid Mechanics
The dimension of kinematic viscosity is

None of these
ML⁻²T⁻²
ML⁻²T⁻¹
L²T⁻¹

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Fluid Mechanics
The inherent characteristic of an equal percentage valve relating flow rate 'q' with valve stem movement 'x' are described by the equation

dq/dx = Kq²
dq/dx = K/q
dq/dx = K
dq/dx = K.q

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Fluid Mechanics
The energy loss in flow through ven-turimeter is less than that through flow nozzle, because in case of a flow nozzle, the

Length is shorter
Throat diameter is more
Sudden expansion of flow in the downstream occurs
Distance between the throat and the inlet is more

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Fluid Mechanics
What is the force required (in Newtons) to hold a spherical balloon stationary in water at a depth of H from the air-water iterface? The balloon is of radius 0.1 m and is filled with air.

0.01πgH/4
4πg/3
0.01πgH/8
0.04πgH/3

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Fluid Mechanics
The variable required to be known in correlations used for estimating the horse power of a centrifugal gas compressor and hence its cost are P. Inlet pressure Q. Compressor rpm R. Delivery pressure S. Volumetric flow rate at inlet.

P, Rand S
R and S
P and R
P, Q and R

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Fluid Mechanics
Water hammer is caused, when water flowing in a pipe is suddenly brought to rest by closing the valve. The extent of pressure thus produced due to water hammer depends on the

Fluid velocity in the pipe
All of these
Pipe length
Time taken to close the valve

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