Fluid Mechanics MCQs

Question 1

What type of motion the fluid element undergoes, when it changes from one position to another position, such that the angle between the two sides change?

Accepted Answer

Angular deformation

Answer

Rotation

Answer

Translation

Answer

Linear deformation

Question 2

Pascal law is not applicable for a/an __________ fluid.

Accepted Answer

None of these

Answer

Accelerating frictionless

Answer

Static

Answer

Uniformly moving

Question 3

A globe valve is the most suitable for applications, in which

Accepted Answer

Fluid flow control is required

Answer

Fluid contains dispersed solid particles

Answer

Valve is required to be either fully open or fully closed

Answer

One way flow is required

Question 4

Fanning equation is given by $$\frac{{\Delta {	ext{p}}}}{ho } = 4{	ext{f}} \cdot \frac{{	ext{L}}}{{	ext{D}}} \cdot \frac{{{{	ext{v}}^2}}}{{2{{	ext{g}}_{	ext{c}}}}}.$$ It is applicable to __________ region flow.

Accepted Answer

Both B and C

Answer

Transition

Answer

Laminar

Answer

Turbulent

Question 5

Boundary layer exists in flow

Accepted Answer

Of real fluids

Answer

Over flat surfaces only

Answer

In pipes only

Answer

Of ideal fluids only

Question 6

Buoyant force

Accepted Answer

Depends on the weight of the floating body

Answer

For non-symmetrical bodies is not vertical

Answer

Depends on the depth of the submergence of the floating body

Answer

None of these

Question 7

The line of action of the buoyant force acts through the

Accepted Answer

Centroid of the displaced volume of fluid

Answer

Centre of gravity of a submerged body

Answer

Centroid of the volume of any floating body

Answer

None of these

Question 8

In a dry packed bed, the pressure drop will be changed by increasing the flow rate as

Accepted Answer

V1.8

Answer

V-0.8

Answer

V

Answer

V-1

Question 9

Identification of pipelines carrying different liquids and gases is done by the __________ of the pipe.

Accepted Answer

Colour

Answer

Diameter

Answer

Altitude

Answer

None of these