(Set 2) Mechanical properties of fluids

Q1. 
Which one of the following statements is not correct?
  1. In steady flow of a liquid, the velocity of liquid particles reaching
  2. Steady flow is also called streamlined flow.
  3. In steady flow, each particle may not follow the same path as taken by a previous particle passing through that point.
  4. Two streamlines cannot intersect with each other.

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Correct Answer : C

Q2. 
With the rise of temperature, the viscosity of liquid
  1. increases
  2. decreases
  3. remains unchanged
  4. may increase or decrease depending on nature of liquid

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Correct Answer : B

Q3. 
If there were no gravity which of the following will not be there for a fluid?
  1. Viscosity
  2. Surface tension
  3. Pressure
  4. Upward Thrust

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Correct Answer : D

Q4. 
Consider the following statements. 1. The viscosity of a gas increases with rise in temperature. 2. The viscosity of the liquid falls very rapidly with rise in temperature. Which of the statement(s) given above is/are correct?
  1. Only 1
  2. Only 2
  3. Both 1 and 2
  4. Neither 1 nor 2

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Correct Answer : C

Q5. 
Consider the following statements. 1. The coefficient of viscosity is the only parameter through which the viscosity of the fluid is measured. 2. Negative sign of coefficient of viscosity indicates that the viscous force opposes the relative motion. 3. The SI unit of viscosity is N-sm^-2 . 4 1 poise = 0.1 N-sm^-2 Which of the statements given above are correct?
  1. 1, 2 and 3
  2. 3, 4 and 2
  3. 2, 3 and 4
  4. 1, 2 and 4

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Correct Answer : D

Q6. 
On a clean glass plate a drop of water spreads to from a thin layer whereas a drop of mercury remains almost spherical because
  1. mercury is a metal
  2. density of mercury is greater than that of water
  3. cohesion of mercury is greater than its adhesion with glass
  4. cohesion of water is greater than its adhesion with glass

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Correct Answer : C

Q7. 
Two identical solid pieces, one of gold and and other of silver, when immersed completely in water exhibit equal weights. When weighed in air (given that, density of gold is greater than that of silver)
  1. the gold piece will weigh more
  2. the silver piece will weight more
  3. Both silver and gold pieces weigh equal
  4. weighing will depend on their masses

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Correct Answer : C

Q8. 
The pressure exerted by a 760 mm column of mercury at 0 degree C is known as
  1. 1 pascal
  2. 1 atm
  3. 1 bar
  4. 1 poise

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Correct Answer : B

Q9. 
Which one of the following is not a result of surface tension?
  1. Nearly spherical drop of rain
  2. Capillary rise
  3. Removal of dirt by soap or detergent
  4. Flow of a liquid

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Correct Answer : D

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