Fluid Mechanics MCQs

Question 1

Which of the following is used for pumping crude oil from oil well?

Accepted Answer

Duplex/triplex reciprocating pump

Answer

Single stage centrifugal pump

Answer

Gear pump

Answer

Screw pump

Question 2

When the head pumped against is less than the head of the fluid used for pumping, the usual device is a/an

Accepted Answer

Airlift

Answer

Ejector

Answer

Blower

Answer

Injector

Question 3

Pressure gradient in the pipe flow is influenced by the

Accepted Answer

All of the above

Answer

Diameter of pipe

Answer

Velocity of the fluid

Answer

Density & viscosity of the fluid

Question 4

In case of supersonic flow of a fluid through pipeline, the 'Mach number' is

Accepted Answer

> 1

Answer

0

Answer

1

Answer

< 1

Question 5

Plunger pumps are used for

Accepted Answer

Higher pressure

Answer

Slurries

Answer

Viscous mass

Answer

None of these

Question 6

Bernoull's equation does not apply to the functioning of a/an

Accepted Answer

None of these

Answer

Venturimeter

Answer

Orificem

Answer

Pitot tube

Question 7

Potential flow is the flow of

Accepted Answer

Incompressible fluids with no shear

Answer

Compressible fluids with shear

Answer

Compressible fluids with no shear

Answer

Incompressible fluids with shear

Question 8

Power number is the ratio of

Accepted Answer

Drag stress to inertial stress

Answer

Inertial stress to drag stress

Answer

Inertial stress to gravitational stress

Answer

Gravitational stress to drag stress

Question 9

Prandtl mixing length is

Accepted Answer

Zero at the pipe wall

Answer

Applicable to laminar flow problems

Answer

A universal constant

Answer

None of these