Fluid Mechanics MCQs

Question 1

The continuity equation in ideal fluid flow states that

Accepted Answer

Net rate of inflow into any small volume must be zero

Answer

Energy is not constant along a streamline

Answer

Energy is constant along a streamline

Answer

There exists a velocity potential

Question 2

Baffles in mixing tanks are provided to

Accepted Answer

Reduce swirling and vortex formation

Answer

Increase the structural strength of the tank

Answer

Aid in rotational flow

Answer

None of these

Question 3

Dean number is concerned with the

Accepted Answer

Fluid flow through helical pipes

Answer

Fluid-particle interaction

Answer

Power consumption in agitated vessels

Answer

Psychrometry

Question 4

Which of the following assumptions enables the Euler's equation of motion to be integrated?

Accepted Answer

The fluid is incompressible

Answer

The fluid is non-viscous

Answer

The continuity equation is satisfied

Answer

The flow is rotational and incompressible

Question 5

Flow measurement in an open channel is done by a/an

Accepted Answer

Weir

Answer

Venturimeter

Answer

Orificemeter

Answer

Rotameter

Question 6

Foot valves provided in pumps are __________ valves.

Accepted Answer

Directional control

Answer

Relief

Answer

Three/four way

Answer

Pressure reducing

Question 7

Theoretical head developed by a centrifugal pump does not depend upon the __________ the impeller.

Accepted Answer

None of these

Answer

Radius of

Answer

Speed of

Answer

Fluid velocity leaving

Question 8

In case of a centrifugal pump, the theoretical head developed is dependent on the __________ the impeller.

Accepted Answer

All of the above

Answer

Speed of

Answer

Diameter of

Answer

Fluid velocity leaving

Question 9

N.second/m2 is

Accepted Answer

The S.I. unit of dynamic viscosity

Answer

The S.I. unit of kinematic viscosity

Answer

Equivalent to one poise

Answer

Equivalent to one stoke