Upto what value of ‘Mach number’, a fluid may be considered as incompressible ?

Related Mcqs:

Unsteady uniform flow is represented by flow through a/an_________________?

A. Long pipe at constant rate B. Long pipe at decreasing rate C. Expanding tube at increasing rate D. Expanding tube at constant rate...

Air vessel provided in a reciprocating pump__________________?

A. Smoothens the flow by avoiding pulsations B. Increases the volumetric efficiency of the pump C. Saves the pump from the danger of cavitation D. None of these...

Bernoulli’s equation describes the _______________?

A. Mechanical energy balance in potential flow B. Kinetic energy balance in laminar flow C. Mechanical energy balance in turbulent flow D. Mechanical energy balance in boundary layer...

With a constant diameter impeller of a centrifugal pump _____________________?

A. Its capacity varies directly as the square of speed B. Head varies as the square of speed C. Horsepower input varies as the square of speed D. Head varies as the speed...

For water, when the pressure increases, the viscosity_________________?

A. Also increases B. Decreases C. Remain constant D. First decreases, and then increases...