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Fluid-mechanics Questions Set 42:

Quiz Mode

What is the dimension of surface tension?

N/m^2

J/m

J/m^2

W/m

Solution:

The pressure energy per unit mass is the ratio of what?

P^2/m

PV/V

All of the above

P/ρ

Solution:

What is the effect on the viscosity of a gas when the temperature is increased?

increases

decreases

remains constant

can't say

Solution:

What type of energy does a hydraulic machine convert hydraulic energy into?

Mechanical energy

Nuclear energy

Electrical energy

None of the above

Solution:

What are the Newtonian constitutive assumptions regarding the relationship between the stress tensor and velocity gradients?

Constant

Linear and isotropic

Linear

Non-Uniform

Solution:

If the pressure at a point is the same in all directions in a fluid under motion, then that fluid is called an _____.

Real fluid

Ideal fluid

Newtonian fluid

Non-Newtonian fluid

Solution:

Calculate the dynamic viscosity in N⋅s/m² for oil with a specific gravity of 0.9 and a kinematic viscosity of 0.25 Stokes at 35°C.

0.0225 N⋅s/m²

0.2520 N⋅s/m²

0.5 N⋅s/m²

0.0214 N⋅s/m²

Solution:

For the stability of floating bodies, the stable equilibrium is attained if the metacentre (M) point ______ the centre of gravity (G).

Lies below

Lies above

Is parallel to

Coincides with

Solution:

The magnitude of the hydraulic hammer effect in a pipe depends on which of the following?

Speed at which valve is closed

Length of the pipe

Elastic properties of the line pipe material

All of the above

Solution:

A circular pipe of Diameter ‘D’ is having the Reynolds number ‘R1’. It is moulded into the pipe of square cross-section, and the measured Reynold number is ‘R2’. Which of the following is the correct value of R2/R1 (length of the pipe is the sam, Answer nearest to 2 digits after the decimal)?

Fluid-mechanics Questions Set 42:

What is the dimension of surface tension?

Solution:

The pressure energy per unit mass is the ratio of what?

Solution:

What is the effect on the viscosity of a gas when the temperature is increased?

Solution:

What type of energy does a hydraulic machine convert hydraulic energy into?

Solution:

What are the Newtonian constitutive assumptions regarding the relationship between the stress tensor and velocity gradients?

Solution:

If the pressure at a point is the same in all directions in a fluid under motion, then that fluid is called an _____.

Solution:

Calculate the dynamic viscosity in N⋅s/m² for oil with a specific gravity of 0.9 and a kinematic viscosity of 0.25 Stokes at 35°C.

Solution:

For the stability of floating bodies, the stable equilibrium is attained if the metacentre (M) point ______ the centre of gravity (G).

Solution:

The magnitude of the hydraulic hammer effect in a pipe depends on which of the following?

Solution:

Solution:

Related Question Sets:

Related Topics:

Fluid-mechanics Questions Set 42:

What is the dimension of surface tension?

Solution:

The pressure energy per unit mass is the ratio of what?

Solution:

What is the effect on the viscosity of a gas when the temperature is increased?

Solution:

What type of energy does a hydraulic machine convert hydraulic energy into?

Solution:

What are the Newtonian constitutive assumptions regarding the relationship between the stress tensor and velocity gradients?

Solution:

If the pressure at a point is the same in all directions in a fluid under motion, then that fluid is called an _____.

Solution:

Calculate the dynamic viscosity in N⋅s/m2 for oil with a specific gravity of 0.9 and a kinematic viscosity of 0.25 Stokes at 35°C.

Solution:

For the stability of floating bodies, the stable equilibrium is attained if the metacentre (M) point ______ the centre of gravity (G).

Solution:

The magnitude of the hydraulic hammer effect in a pipe depends on which of the following?

Solution:

Solution:

Related Question Sets:

Related Topics:

Calculate the dynamic viscosity in N⋅s/m² for oil with a specific gravity of 0.9 and a kinematic viscosity of 0.25 Stokes at 35°C.