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Fluid-mechanics Questions Set 38:

Quiz Mode

For an ideal fluid, the viscosity is

Zero

Infinite

Unity

More than that of honey

Solution:

Given the velocity vector parameters: u = 2 m/s, v = -3 m/s, w = 6 m/s in an Eulerian method, determine the resultant velocity.

-7 m/s

6 m/s

7 m/s

8 m/s

Solution:

A fluid whose viscosity does not change with the rate of deformation or shear strain is known as

Real fluid

Ideal fluid

Newtonian fluid

Non newtonian fluid

Solution:

In conservation of mass in fluid flow, if dm / dt = 0, then the fluid flow results:

In system deformation

In moving of system

In control surface

All of these

Solution:

The metacentric height of a ship is 0.8 m and the radius of gyration is 8 m. What is the time of rolling of the ship? Given: g = 9.8 m/s²

17.64 s

17.74 s

17.84 s

17.94 s

Solution:

To find the shape factor from the displacement thickness, which other parameter will be required?

Length thickness

Boundary thickness

Momentum thickness

Double the Boundary thickness

Solution:

Calculate the metacentric height of a rectangular cross-section body with specific gravity 2, height 2m and width 1m, which is immersed in a fluid with specific gravity 1.

0.167 m

0.005 m

0.367 m

1.005 m

Solution:

How does the local pressure of a stationary fluid vary?

It doesn't vary with any factor

It varies with change in horizontal direction only

It varies with change in depth only

It varies with change in both depth and horizontal direction

Solution:

In a horizontal tube with streamlined water flow, if two points X and Y are at the same horizontal level, then:

Pressures at X and Y are equal for any shape of the tube.

Pressures may be equal even if the tube has a nonuniform cross-section.

Pressures are equal if the tube has a uniform cross-section.

Both options 2 and 3 are correct.

Solution:

What is the effect of pressure and temperature on the viscosity of fluids?

Pressure has very little effect on viscosity, and as the temperature of the fluid increases, its viscosity increases.

If pressure increases, viscosity would also increase, and as the temperature of the fluid increases, its viscosity decreases.

If pressure decreases, viscosity would increase, and as the temperature of the fluid decreases, its viscosity decreases.

Viscosity is independent of pressure and temperature.

Fluid-mechanics Questions Set 38:

For an ideal fluid, the viscosity is

Solution:

Given the velocity vector parameters: u = 2 m/s, v = -3 m/s, w = 6 m/s in an Eulerian method, determine the resultant velocity.

Solution:

A fluid whose viscosity does not change with the rate of deformation or shear strain is known as

Solution:

In conservation of mass in fluid flow, if dm / dt = 0, then the fluid flow results:

Solution:

The metacentric height of a ship is 0.8 m and the radius of gyration is 8 m. What is the time of rolling of the ship? Given: g = 9.8 m/s²

Solution:

To find the shape factor from the displacement thickness, which other parameter will be required?

Solution:

Calculate the metacentric height of a rectangular cross-section body with specific gravity 2, height 2m and width 1m, which is immersed in a fluid with specific gravity 1.

Solution:

How does the local pressure of a stationary fluid vary?

Solution:

In a horizontal tube with streamlined water flow, if two points X and Y are at the same horizontal level, then:

Solution:

What is the effect of pressure and temperature on the viscosity of fluids?

Solution:

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