Hydraulic Fluid Mechanics MCQs

Question 1

Hydraulic grade line for any flow ,system as compared to energy line is

Accepted Answer

Below

Answer

Above

Answer

At same level

Answer

May be below or above depending upon velocity of flow

Question 2

Which curve in Fig. 8.4 shows the correct nature of distribution of stress at a cross section in a horizontal circular pipe under steady flow conditions ?

Accepted Answer

Curve A

Answer

Curve B

Answer

Curve C

Answer

Curve D

Question 3

The magnitude of water hammer depends on

Accepted Answer

All of the above

Answer

Length of pipe

Answer

Elastic properties of pipe material

Answer

Rate of stoppage of flow

Question 4

The magnitude of water hammer does not depend upon

Accepted Answer

Temperature of fluid

Answer

Length of pipe

Answer

Elastic properties of pipe material

Answer

Time of valve closure

Question 5

Which of the following represents unsteady uniform flow

Accepted Answer

Flow through a long pipe at decreasing 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 constant rate

Question 6

A weir in which the downstream water level of the weir nappe is higher than the crest, is called

Accepted Answer

Submerged weir

Answer

Overflowing weir

Answer

Broadcrested wear

Answer

Cipoletti weir

Question 7

Discharge through a totally submerged orifice is directly proportional to

Accepted Answer

The square root of the difference in elevation of water surface

Answer

The difference in elevation of water surface

Answer

The square root of the area of the opening

Answer

Reciprocal of the area of the opening

Question 8

The upper surface of the weir over which water flows, is known as

Accepted Answer

Sill

Answer

Vein

Answer

Nappe

Answer

Weir top surface

Question 9

Which of the following represents steady non-uniform flow

Accepted Answer

Flow through an expanding tube at constant rate

Answer

Flow through an expanding tube at an increasing rate

Answer

Flow through a long pipe at decreasing rate

Answer

Flow through a long pipe at a constant rate