Chapter-10: Mechanical Properties Of Fluids |

1. Unit of Pressure is-

- Dyne
- N-m
- Pascal (Pa)
- Nm²

2. Unit of Thrust is –

- Pascal (Pa)
- Erg
- Newton
- N-m²

3. Unit of Density is –

- Kg.m
- Kg.m⁻³
- Kg.m²
- Kg.m³

4. The dimension of Pressure is –

- [ML⁻¹T⁻²]
- [ML⁻³]
- [MLT⁻¹]
- None of these

5. The dimension of Density is-

- [ML⁻¹T⁻²]
- [ML⁻³]
- [MLT⁻¹]
- None of these

6. Which of the following instrument is used for measuring atmospheric! pressure?

- Thermometer
- Manometer
- Hydrometer

7. Which of the following instrument is used for measuring gauge pressure?

- Thermometer
- Manometer
- Hydrometer
- Barometer

8. Hydraulic brakes are based on which law?

- Torricelli’s Law
- Boyle’s Law
- Pascal’s Law
- Newton’s Law

9. Hydraulic lifts are based on which law?

- Torricelli’s Law
- Pascal’s Law
- Newton’s Law
- Newton’s Law

10. A force of 40 N is applied on a nail, whose tip has an area of cross-section of 0.001 cm². The pressure on the tip is –

- 4 x 10⁸ Nm⁻²
- 4 x 10⁸ Nm²
- 4 x 10⁴ Nm⁻²
- None of these

11. Which of the following is associated with liquid only and not for gases?

- Surface tension
- Pressure
- Volume
- Density

12. Applications of Bernoulli’s theorem can be seen in –

- dynamic lift of an airplane
- hydraulic press
- helicopter
- None of these

13. S. I. unit of surface tension is –

- Nm
- Nm⁻¹
- Nm⁻²
- Nm⁻³

14. S. I. unit of coefficient of viscosity –

- poise
- dyne
- erg
- henry

15. On the increasing temperature, the surface tension –

- Increases
- Decreases
- Remains unchanged
- None of these

16. The dimension of viscosity is –

- [MLT⁻²]
- [ML⁻¹T⁻²]
- [ML²T⁻²]
- None of these

17. The coefficient of viscosity of a liquid, on increasing temperature –

- increases
- Decreases
- remains constant
- None of these

18. When the temperature is increased, the angle of contact of a liquid –

- increases
- Decreases
- remains constant
- None of these