Related Questions

Venturimeters, orificemeters and nozzles are used to measure the fluid discharge from a pipeline. The average fluid velocity in a pipeline can be measured by a/an
A Weir
B Hot wire anemometer
C Cup and vane aneometer
D None of these
The energy loss over a length of pipeline according to Darcy-Weisbach equation for pipe flow is _________ the mean velocity of flow.
A Directly proportional to
B Directly proportional to square of
C Inversely proportional to
D Inversely proportional to square of
The most suitable flow measuring device for the fluid flow measurement in a very large diameter pipeline is a
A Weir
B Pitot tube
C Kennison nozzle
D V-notch
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
With diminishing cross-sectional area in case of subsonic flow in a converging nozzle, the
A Velocity increases
B Pressure decreases
C Both A and B
D Neither A nor B
Velocity of liquid hydrocarbon fuels in a pipeline can not be measured by magnetic flowmeters, because their __________ is very low/small.
A Thermal conductivity
B Electrical conductivity
C Specific gravity
D Electrical resistivity
In order that flow takes place between two points in a pipeline, the differential pressure between these points must be more than
A Frictional force
B Viscosity
C Surface friction
D All of the above
Flow occurring in a pipeline when a valve is being opened is
A Steady
B Unsteady
C Laminar
D Vortex
Nature of fluid flow during the opening of a valve in a pipeline is
A Laminar
B Unsteady
C Steady
D Uniform
In case of supersonic flow of a fluid through pipeline, the 'Mach number' is
A 0
B 1
C > 1

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