Hydraulic Fluid Mechanics MCQs

Question 1

Uniform flow occurs when

Accepted Answer

At every point the velocity vector is identical, in magnitude and direction, for any given instant

Answer

The flow is steady

Answer

Discharge through a pipe is constant

Answer

Conditions do not change with time at any point

Question 2

Which of the following represents steady uniform flow

Accepted Answer

Flow through a long pipe at constant rate

Answer

Flow through an expanding tube at an increasing rate

Answer

Flow through an expanding tube at constant rate

Answer

Flow through a long pipe at decreasing rate

Question 3

In the case of turbulent flow

Accepted Answer

Shear stresses are more compared to laminar flow.

Answer

It occurs in open channel

Answer

Velocity at boundary is zero

Answer

It is not possible to measure flow

Question 4

For a siphon to work satisfactorily, the minimum pressure in the pipe as compared to vapour pressure of liquid should be

Accepted Answer

More

Answer

Less

Answer

Equal

Answer

Could be anything

Question 5

Water hanuner in pipes occurs due to

Accepted Answer

Sudden change in the velocity of any flowing fluid

Answer

Someone hitting the pipe with a hammer

Answer

Heavy pressurisation of pipe

Answer

Obstruction in pipe

Question 6

Which of the following represents unsteady non-uniform flow

Accepted Answer

Flow through an expanding tube at an increasing rate

Answer

Flow through an expanding tube at constant rate

Answer

Flow through a long pipe at decreasing rate

Answer

Flow through a long pipe at constant rate

Question 7

Fire hose nozzle is generally made of

Accepted Answer

Convergent shape

Answer

Divergent shape

Answer

Convergent-divergent shape

Answer

Cylindrical shape

Question 8

Chezy's equation is used to determine

Accepted Answer

Velocity of flow in open channel

Answer

Velocity of flow in pipe

Answer

Flow over weirs

Answer

Discharge through notch

Question 9

Equation of continuity results from the principal of conservation of

Accepted Answer

Mass

Answer

Energy

Answer

Flow

Answer

Momentum