Fluid Mechanics MCQs

Question 1

High specific speed of a pump implies that, it is a/an __________ pump.

Accepted Answer

Axial flow

Answer

Centrifugal

Answer

Mixed flow

Answer

None of these

Question 2

Low specific speed of a pump implies that, it is a/an __________ pump.

Accepted Answer

Centrifugal

Answer

Axial flow

Answer

Mixed flow

Answer

None of these

Question 3

The temperature in isentropic flow

Accepted Answer

Depends on Mach number only

Answer

Does not depend on Mach number

Answer

Cannot drop and then increase again downstream

Answer

None of these

Question 4

Choose the set of pressure intensities that are equivalent.

Accepted Answer

4.33 psi, 10 ft. of water, 8.83 inches of Hg

Answer

4.33 psi, 10 ft. of water, 20.7 inches of Hg

Answer

10 psi, 19.7 ft. of water, 23.3 inches of Hg

Answer

10 psi, 19.7 ft. of water, 5.3 inches of Hg

Question 5

With increase in the ratio of orifice diameter to pipe diameter in case of an orificemeter, the overall pressure loss

Accepted Answer

Remains constant

Answer

Decreases

Answer

Increases

Answer

Increases linearly

Question 6

Laminar flow is characterised by the nonexistence of

Accepted Answer

All of the above

Answer

Pressure fluctuation

Answer

Eddies

Answer

Deviating velocities

Question 7

Terminal velocity is

Accepted Answer

A constant velocity with no acceleration

Answer

A fluctuating velocity

Answer

Attained after moving one-half of total distance

Answer

None of these

Question 8

A piezometer opening measures the __________ fluid pressure.

Accepted Answer

Undisturbed

Answer

Static

Answer

Total

Answer

Dynamic

Question 9

The centre of pressure is

Accepted Answer

A point on the line of action of the resultant force

Answer

Always below the centroid of the area

Answer

Always above the centroid of the area

Answer

At the centroid of the submerged area