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Fluid-mechanics Questions Set 21:

Quiz Mode

What is the velocity profile for Poiseuille flow?

constant

zero

linear

quadratic

Solution:

What is the pressure at a point 2 m below the free surface of water?

19600 Pa

29600 Pa

39600 Pa

9600 Pa

Solution:

The velocity distribution for turbulent flow through circular pipes is:

uniform

linear

parabolic

logarithmic

Solution:

The hydrostatic pressure (in pascals) at a depth of 2 m below the water surface is _____.

98100

19620

9810

196

Solution:

Which of the following are considered commercial sources of energy?

Wood

Animal wastes

Agricultural wastes

Solar energy

Solution:

The head loss of fluid at the entrance of a pipe is:

Equal to the head loss at the pipe exit

Half the head loss at the pipe exit

Twice the head loss at the pipe exit

Four times the head loss at the pipe exit

Solution:

A wooden rectangular block of length l is made to float in water with its axis vertical. The center of gravity of the floating body is 0.15l above the center of buoyancy. What is the specific gravity of the wooden block?

0.6

0.65

0.7

0.75

Solution:

What is the main use of flow net analysis in fluid mechanics?

To determine the streamline and equipotential lines

To determine downward lift pressure above hydraulic structure

To determine the viscosity for given boundaries of flow

To design the hydraulic structure

Solution:

On which of the following factors does the speed of water coming out of a small hole at the bottom of a tank containing liquid not depend?

the density of the liquid

the area of the hole

the height of the liquid from the hole

both the density of the liquid and the area of the hole

Solution:

The diameters of a small piston and a large piston of a hydraulic jack are 45 mm and 100 mm respectively. A force of 0.09 kN is applied on the smaller piston. Find the load lifted by the larger piston if the smaller piston is 40 cm above the larger piston. The density of the fluid is 850 kg/m³.

None of the mentioned

12 N/cm²

60 N/cm²

30 N/cm²

Fluid-mechanics Questions Set 21:

What is the velocity profile for Poiseuille flow?

Solution:

What is the pressure at a point 2 m below the free surface of water?

Solution:

The velocity distribution for turbulent flow through circular pipes is:

Solution:

The hydrostatic pressure (in pascals) at a depth of 2 m below the water surface is _____.

Solution:

Which of the following are considered commercial sources of energy?

Solution:

The head loss of fluid at the entrance of a pipe is:

Solution:

A wooden rectangular block of length l is made to float in water with its axis vertical. The center of gravity of the floating body is 0.15l above the center of buoyancy. What is the specific gravity of the wooden block?

Solution:

What is the main use of flow net analysis in fluid mechanics?

Solution:

On which of the following factors does the speed of water coming out of a small hole at the bottom of a tank containing liquid not depend?

Solution:

The diameters of a small piston and a large piston of a hydraulic jack are 45 mm and 100 mm respectively. A force of 0.09 kN is applied on the smaller piston. Find the load lifted by the larger piston if the smaller piston is 40 cm above the larger piston. The density of the fluid is 850 kg/m³.

Solution:

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