Quiz for Viscosity

Q1: What is the SI unit of viscosity?

A. Pa·s B. N·m C. kg/m² D. N/s

Q2: Which of the following liquids has the highest viscosity at room temperature?

A. Water B. Alcohol C. Glycerin D. Mercury

Q3: Viscous force is a type of:

A. Conservative force B. Frictional force C. Electrostatic force D. Centripetal force

Q4: Poise is a unit of:

A. Force B. Pressure C. Viscosity D. Density

Q5: Stoke is the unit of:

A. Kinematic viscosity B. Dynamic viscosity C. Velocity D. Density

Q6: Which law governs the flow of liquid through a narrow tube?

A. Boyle’s Law B. Hooke’s Law C. Newton’s Law D. Poiseuille’s Law

Q7: What is the relation between kinematic viscosity (ν) and dynamic viscosity (η)?

A. ν = η × ρ B. ν = η / ρ C. ν = η² × ρ D. ν = η + ρ

Q8: Which of the following decreases viscosity?

A. Cooling the liquid B. Adding solutes C. Heating the liquid D. Compressing the liquid

Q9: For a Newtonian fluid, shear stress is:

A. Directly proportional to strain B. Directly proportional to strain rate C. Independent of strain rate D. Inverse of strain

Q10: Viscous force depends on:

A. Speed of object only B. Area of contact only C. Speed, area, and viscosity coefficient D. Volume of fluid only

Q11: In streamline flow, viscosity:

A. Is zero B. Is maximum C. Opposes relative motion D. Helps acceleration

Q12: Which among the following is a non-Newtonian fluid?

A. Water B. Air C. Blood D. Alcohol

Q13: Terminal velocity in a viscous fluid depends on:

A. Square of radius B. Square root of mass C. Radius D. Density only

Q14: Which of the following is used to measure viscosity?

A. Barometer B. Viscometer C. Hygrometer D. Manometer

Q15: Stokes’ law is valid for:

A. Turbulent flow B. Compressible fluids C. Small spherical bodies in a fluid D. High velocity only

Q16: If viscosity of a liquid is high, then flow rate will be:

A. High B. Low C. Unaffected D. Oscillatory

Q17: Which property of fluid decreases with temperature?

A. Density B. Pressure C. Viscosity D. Volume

Q18: The terminal velocity of a falling sphere in a fluid increases with:

A. Decrease in viscosity B. Increase in fluid density C. Decrease in radius D. None of these

Q19: Which of the following statements is true about viscosity?

A. It is independent of temperature B. It increases for gases with temperature C. It decreases for gases with temperature D. It remains constant for all fluids