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Fluid-mechanics Questions Set 58:

Quiz Mode

What is the term used for the kinematic coefficient of viscosity?

Stokes

Prandtl

Pascal

Navier

Solution:

Consider the following image and match the following

J-P; K-Q; L-R

J-Q; K-P; L-R

J-Q; K-R; L-P

J-P; K-R; L-Q

Solution:

What is the maximum number of times the pathlines of two particles can intersect in a one-dimensional flow?

Solution:

Why is jet propulsion of ships less efficient than screw propellers?

Temperature

Wear and tear

Pressure

Frictional losses

Solution:

A soap bubble is 60 mm in diameter. If the surface tension of the soap film is 0.012 N/m, find the excess pressure inside the bubble in Pascals (Pa).

1.0 Pa

2.4 Pa

0.8 Pa

1.6 Pa

Solution:

When a vertical cylindrical vessel containing water is rotated about its axis, then the free surface of water becomes

a cycloid of revolution

an ellipsoid of revolution

a hyperboloid of revolution

a parabolic of revolution

Solution:

If a body is submerged in water and has a vertical component force Fz of 15 N and a horizontal component force Fx of -8 N, determine the angle at which the resultant force will act.

1.875 degrees

-61.92 degrees

120 degrees

-30.89 degrees

Solution:

A plate 5 x 10^3 m distant from a fixed plate moves at 1.2 m/s at steady speed with the viscosity as 9.16 x 10^-5 N·s/m^2. Determine the force per unit area (shear stress) required to maintain this motion.

2.2 kN/m^2

22 N/m^2

2.2 N/m^2

1.2 N/m^2

Solution:

What is the reason for the spherical shape of soap bubbles, raindrops, and other similar objects?

Because spheres have more surface area.

Because spheres are light in weight.

Because spheres have the least surface area.

Because spheres are circular in nature.

Solution:

What should be the viscosity of the fluid for laminar flow?

The viscosity of the fluid should be as low as possible for laminar flow

The viscosity of the fluid should be as high as possible for laminar flow

Changes in viscosity of the flowing fluid do not affect its flow

The viscosity of the flowing fluid for laminar flow is unpredictable

Fluid-mechanics Questions Set 58:

What is the term used for the kinematic coefficient of viscosity?

Solution:

Consider the following image and match the following

Solution:

What is the maximum number of times the pathlines of two particles can intersect in a one-dimensional flow?

Solution:

Why is jet propulsion of ships less efficient than screw propellers?

Solution:

A soap bubble is 60 mm in diameter. If the surface tension of the soap film is 0.012 N/m, find the excess pressure inside the bubble in Pascals (Pa).

Solution:

When a vertical cylindrical vessel containing water is rotated about its axis, then the free surface of water becomes

Solution:

If a body is submerged in water and has a vertical component force Fz of 15 N and a horizontal component force Fx of -8 N, determine the angle at which the resultant force will act.

Solution:

A plate 5 x 10^3 m distant from a fixed plate moves at 1.2 m/s at steady speed with the viscosity as 9.16 x 10^-5 N·s/m^2. Determine the force per unit area (shear stress) required to maintain this motion.

Solution:

What is the reason for the spherical shape of soap bubbles, raindrops, and other similar objects?

Solution:

What should be the viscosity of the fluid for laminar flow?

Solution:

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