A. The coefficient of viscosity is a property of Select one: 1. the stress 2. th

Question

A.

The coefficient of viscosity is a property of

Select one:

1. the stress

2. the fluid

3. the body over which flow occurs

4. the boundary condition

5. the total velocity

B. Newton’s law of viscosity relates:

Select one:

1. Stress and strain in a fluid

2. Pressure, velocity and viscosity of a gas

3. Shear stress and rate of angular deformation in a liquid

4. Yield stress, viscosity and rate of angular deformation

C. Select the correct statement

Select one:

1. Viscosity of a gas increases with temperature

2. Density of a gas increases with temperature

3. Surface tension of a liquid increases with temperature

4. Bulk modulus of a liquid is independent of temperature

5. Vapour pressure of a liquid is independent of temperature

Explanation / Answer

Part A

The Coefficient of Viscosity is a property of the fluid. When the liquid is in motion, the viscosity comes into picture and it tends to oppose the relative motion between two layers. Therefore, option 2 is correct.

Part B

Newton's Law of Viscosity relates shear stress and rate of angular deformation in a liquid. It states that the shear stress between adjacent fluid layers is proportional to the velocity gradient between the two layers. Therefore, option 3 is correct.

Part C

Viscosity of a gas increases with temperature. This statement is correct. The rest of the statements are false. So option 1 is correct.

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