Mach number is defined as the ratio of the local flow velocity to the – McqOptions

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1.	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.	< 0.3
B.	> 3
C.	50
D.	1
Answer» B. > 3

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