Physics – Viscosity

1. What happens to the viscosity of a liquid as temperature increases?

  1. It increases exponentially
  2. It generally decreases
  3. It remains constant
  4. It becomes zero
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Answer: Option B. It generally decreases

2. Which of the following is a representation of viscosity?

  1. The measure of a fluid’s resistance to flow
  2. The speed at which a fluid flows
  3. The temperature at which a liquid freezes
  4. The density of a gas
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Answer: Option A. The measure of a fluid’s resistance to flow

3. What do we call the maximum velocity of a fluid in a tube for which the flow is uniform?

  1. Maximum velocity
  2. Peak velocity
  3. Critical velocity
  4. Uniform velocity
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Answer: Option C. Critical velocity

4. Which of the following liquids has the highest viscosity?

  1. Water
  2. Honey
  3. Alcohol
  4. Blood
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Answer: Option B. Honey

5. What is the SI unit for measuring viscosity?

  1. Newton-meter (Nm)
  2. Kilogram per second (kg/s)
  3. Joule (J)
  4. Pascal-second (Pa.s)
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Answer: Option D. Pascal-second (Pa.s)