Related Questions

Transition from laminar flow to turbulent flow in fluid flow through a pipe does not depend upon the
A Length of the pipe
B Diameter of the pipe
C Density of the fluid
D Velocity of the fluid
The depth ‘d’ below the free surface at which the point velocity is equal to the average velocity of flow for a uniform laminar flow with a free surface, will be (where D is the depth of flow)
A 0.423 D
B 0.577 D
C 0.223 D
D 0.707 D
The process, which causes the air to enter the impeller blades of a centrifugal compressor at ________ velocity (without effecting the mass of air to flow and velocity of flow) is known as prewhirl.
A Reduced
B Increased
C Zero
D None of these
What is the ratio of the velocity at the axis of the pipe to the mean velocity of flow in case of pipe flow under viscous condition?
A 0.5
B 0.67
C 1
D 2
The velocity at which the flow changes from laminar flow to turbulent flow is called
A Critical velocity
B Velocity of approach
C Sub-sonic velocity
D Super-sonic velocity
Velocity of sound in air does not depend on
A Density of air
B Temperature of air
C Pressure of air
D Humidity of air
If there are no externally induced flow velocities, then the Nusselt Number (Nu) does not depend upon
A Prandtl number
B Reynolds number
C Grashof Number
D none of the
The total frictional resistance to fluid flow does not depend upon the
A Roughness of the surface
B Fluid pressure
C Fluid density
D Fluid velocity
Friction factor for fluid flow in pipe does not depend upon the
A Pipe length
B Pipe roughness
C Fluid density & viscosity
D Mass flow rate of fluid
The frictional resistance in laminar flow does not depend on the
A Area of surface in contact
B Flow velocity
C Fluid temperature
D Pressure of flow

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