Fluid Mechanics MCQs

Question 1

Enamels and paints are generally __________ fluid.

Accepted Answer

Pseudo-plastic

Answer

Reheopectic

Answer

Thixotropic

Answer

Dilatant

Question 2

In case of isentropic flow, the speed of sound in an ideal gas is proportional to (where, T = absolute temperature )

Accepted Answer

$$\sqrt {	ext{T}} $$

Answer

$$\frac{1}{{\sqrt {	ext{T}} }}$$

Answer

$$\frac{1}{{	ext{T}}}$$

Answer

T

Question 3

The pressure intensity is the same in all directions at a point in a fluid

Accepted Answer

When there is no motion of one fluid layer relative to an adjacent layer

Answer

Only when the fluid is frictionless

Answer

Only when the fluid is at rest having zero velocity

Answer

Regardless of the motion of one fluid layer relative to an adjacent layer

Question 4

For the same terminal conditions and valve size, the pressure drop in a fully opened globe valve as compared to that in a gate valve is

Accepted Answer

More

Answer

Less

Answer

Equal

Answer

Either A or B; depends on the viscosity of the fluid

Question 5

Working principle of manometer comprises of balancing a coloumn of liquid against the pressure to be measured. Inclined tube manometer is especially used for the measurement of __________ pressure.

Accepted Answer

Small differential

Answer

Atmospheric

Answer

Absolute

Answer

Gage

Question 6

Differential manometer measures the

Accepted Answer

Pressure difference between two points

Answer

Atmospheric pressure

Answer

Sub-atmospheric pressure

Answer

None of these

Question 7

Pitot tube measures the __________ of a fluid.

Accepted Answer

Point velocity

Answer

Pressure

Answer

Average velocity

Answer

Average flow rate

Question 8

What is the maximum theoretical suction lift (metres) of a reciprocating pump?

Accepted Answer

10

Answer

5

Answer

50

Answer

100

Question 9

In an incompressible fluid, the density is

Accepted Answer

Not affected with moderate change in temperature & pressure

Answer

Greatly affected by moderate changes in pressure

Answer

Greatly affected only by moderate changes in temperature

Answer

Sensible to changes in both temperature & pressure