Viscosity MCQ Questions and Answers for Practice

1. What is Viscosity?

1. A fluids colour
2. A fluids temperature
3. A fluids resistance to flow
4. None of these

2. Poise is the unit of

1. Mass density
2. Kinematic viscosity
3. viscosity
4. velocity gradient

3. Viscosity of water in comparison to mercury is

1. Higher
2. Lower
3. Same
4. Higher/lower depending on temperature

4. Excessive friction takes place when the viscosity is

1. Too high
2. Too low
3. Moderate
4. Zero

5. 1 Stoke is equal to

1. 10 centi stokes
2. 100 centi stokes
3. 1000 centi stokes
4. None of these

6. A fluid having no viscosity is known as

1. Real fluid
2. Ideal fluid
3. Super fluid
4. None of these

7. A fluid which obeys the Newtons law of viscosity is termed as

1. Real fluid
2. Ideal fluid
3. Newtonian fluid
4. Non Newtonian fluid

8. Fluids with very high viscosity flow very.........

1. fast
2. slow
3. dont flow
4. none of these

9. The best example of a substance with low viscosity is?

1. Honey
2. Soap
3. Marbles
4. Water

10. The viscosity of a fluid in motion is 1 poise

1. 0.5
2. 1
3. 2

11. The viscosity of an oil decrease when temperature

1. Decreases
2. Is constant
3. Increases
4. 100<>sup>oC

12. The viscosity of petroleum oil for hydraulic lifts is

1. High
2. Low
3. Moderate
4. Very high

13. Viscous force between the two layers having unit area and unit velocity gradient.

1. Coefficient of viscosity
2. Surface tension
3. Elasticity
4. None of the above

14. What do you call the resistance of a liquid to flow?

1. volume
2. mass
3. viscosity
4. fluidity

15. What happens to the viscosity of liquid with the increase in temperature?

1. It increases
2. It decreases
3. It may increase or decrease
4. No change