Related Questions

Mach number is defined as the ratio of the local flow velocity to the sonic velocity in the fluid. For what value of Mach number, the gases are considered incompressible?
A [

A.

B. > 3

B 50
C 1
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 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
In which type of fluid flow, the velocity of flow of fluid changes from point to point in the fluid at any instant?
A Rotational
B Unsteady
C Turbulent
D Non-uniform
The Mach number for hypersonic flow of compressible fluid is
A 1
B > 1
C > 4
In a centrifugal compressor, the highest Mach number leading to shock wave in the fluid flow occurs at
A Diffuser inlet radius
B Diffuser outlet radius
C Impeller inlet radius
D Impeller outlet radius
Mach number is important in a fluid flow problem, when the inertia and __________ forces predominate.
A Elastic
B Viscous
C Gravity
D None of these
Nature of fluid flow during the opening of a valve in a pipeline is
A Laminar
B Unsteady
C Steady
D Uniform
When the Mach number is between --------the flow is called supe-sonic flow.
A 1 and 6
B 4 and 6
C 2.5 and 4
D 1 and 2.5
When the Mach number is between __________ the flow is called super-sonic flow.
A 1 and 2.5
B 2.5 and 4
C 4 and 6
D 1 and 6

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