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
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
When the Mach number is less than unity, the flow is called
A Sub-sonic flow
B Sonic flow
C Super-sonic flow
D Hyper-sonic flow
A flow is called hyper-sonic, if the Mach number is
A Less than unity
B Unity
C Between 1 and 6
D None of these
A flow is called sub-sonic, if the Mach number is
A Less than unity
B Unity
C Between 1 and 6
D More than 6
The Mach number for hypersonic flow of compressible fluid is
A 1
B > 1
C > 4
For hypersonic flow, the Mach number is
A Unity
B Greater than unity
C Greater than 2
D Greater than 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
In case of supersonic flow of a fluid through pipeline, the 'Mach number' is
A 0
B 1
C > 1

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