MCQs on Viscosity
MCQs on Viscosity
Q1: Which of the following represents viscosity?
- Potential energy stored in fluid
- Resistance to fluid motion
- Roughness of the surface
- The pressure difference between the two fluids
Answer: (b) Resistance to fluid motion
Q2: What is the SI unit of viscosity?
- No units
Answer: (b) Poiseiulle
Q3: Which of these fluids has the highest viscosity?
Q4: What happens to the viscosity of liquid with the increase in temperature
- It increases
- It decreases
- It may increase or decrease
- No change
Answer: (b) It decreases
Q5: What do we call the maximum velocity of a fluid in a tube for which the flow remains streamlined?
- Hyper velocity
- critical velocity
- Stream velocity
- Laminar velocity
Answer: (b) critical velocity
Q6: Which of the following represents Kinematic viscosity?
Answer: (c) Viscosity/density
Q7: Which of these ratios gives the value of viscosity of fluid?
- Ratio of the shearing stress to the weight of the fluid
- Ratio of the shearing stress to the density of the fluid
- Ratio of the velocity gradient and shearing stress
- The ratio of the shearing stress to the velocity gradient
Answer: (d) The ratio of the shearing stress to the velocity gradient
Q8: The relative motion between the adjacent layers of a fluid in motion is called viscous force. Which of the flowing suits the best in the sentence?
- Effects at some conditions
- Never affects
Answer: (c) Opposes
Q9: Which among the following statement is the definition of a pseudoplastic liquid?
- It is a liquid that becomes less viscous over time when constant shear stress is applied
- As the rate of shear increases, it becomes less viscous
- When constant shear stress is applied the liquid becomes more viscous over time
- A liquid which becomes more viscous as the rate of shear increases
Answer: (b)It is a liquid that becomes less viscous as the rate of shear increases
Q10: Which is the following is the correct definition of solubility?
- The rate at which a solute dissolves into a solvent
- The ability of a solid particle to disperse throughout a liquid continuous phase
- The rate at which the immiscible liquid droplets disperse within a second in the liquid phase
- The ability of a solute to dissolve into a solvent
Answer: (d) The ability of a solute to dissolve into a solvent