Fluid Mechanics MCQs

Question 1

Unsteady uniform flow is represented by flow through a/an

Accepted Answer

Long pipe at decreasing rate

Answer

Long pipe at constant rate

Answer

Expanding tube at increasing rate

Answer

Expanding tube at constant rate

Question 2

Unsteady non-uniform flow is represented by flow through a/an

Accepted Answer

Expanding tube at increasing rate

Answer

Long pipe at constant rate

Answer

Long pipe at decreasing rate

Answer

Expanding tube at constant rate

Question 3

Steady uniform flow is represented by flow through a/an

Accepted Answer

Long pipe at constant rate

Answer

Long pipe at decreasing rate

Answer

Expanding tube at constant rate

Answer

None of these

Question 4

The co-efficient of drag and lift for an incompressible fluid depends on the

Accepted Answer

Reynolds number

Answer

Froude number

Answer

Mach number

Answer

All of the above

Question 5

__________ flow means the flow of incompressible fluid with no shear.

Accepted Answer

Potential

Answer

Streamline

Answer

Creep

Answer

Boundary layer

Question 6

For the same flow rate of a fluid, the pressure drop is the least for

Accepted Answer

Venturimeter

Answer

Orificemeter

Answer

Flow-nozzle

Answer

Δp is same for all

Question 7

Isothermal turbulent flow of a fluid results in decrease of its pressure, which depends on the

Accepted Answer

Both A and B

Answer

Wall roughness

Answer

Reynolds number

Answer

Neither A nor B

Question 8

Propellers are

Accepted Answer

Axial flow mixers

Answer

Low speed impeller

Answer

Used for mixingliquids of high viscosity

Answer

Radial flow mixers

Question 9

Horsepower requirement for given pump capacity depends upon the

Accepted Answer

All of the above

Answer

Specific gravity of the liquid

Answer

Suction lift

Answer

Discharge head