# CHAPTER-10: MECHANICAL PROPERTIES OF FLUIDS

1. Unit of Pressure is-

• Dyne
• N-m
• Pascal (Pa)
• Nm²
Pascal (Pa)

2. Unit of Thrust is –

• Pascal (Pa)
• Erg
• Newton
• N-m²
Newton

3. Unit of Density is –

• Kg.m
• Kg.m⁻³
• Kg.m²
• Kg.m³
Kg.m⁻³

4. The dimension of Pressure is –

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

5. The dimension of Density is-

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

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

• Thermometer
• Barometer
• Manometer
• Hydrometer
Barometer

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

• Thermometer
• Manometer
• Hydrometer
• Barometer
Manometer

8. Hydraulic brakes are based on which law?

• Torricelli’s Law
• Boyle’s Law
• Pascal’s Law
• Newton’s Law
Pascal’s Law

9. Hydraulic lifts are based on which law?

• Torricelli’s Law
• Pascal’s Law
• Newton’s Law
• Newton’s Law
Pascal’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
4 x 10⁸ Nm⁻²

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

• Surface tension
• Pressure
• Volume
• Density
Surface tension

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

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

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

• Nm
• Nm⁻¹
• Nm⁻²
• Nm⁻³
Nm⁻¹

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

• poise
• dyne
• erg
• henry
poise

15. On the increasing temperature, the surface tension –

• Increases
• Decreases
• Remains unchanged
• None of these
Decreases

16. The dimension of viscosity is –

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

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

• increases
• Decreases
• remains constant
• None of these
Decreases

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

• increases
• Decreases
• remains constant
• None of thes 