Quiz  /  Fluid Mechanics Class 9 MCQ Questions With Answers

  • 1. 
    The pressure in a liquid at a given depth is...

  • surface tension
  • gas pressure
  • hydrostatic
  • hydraulic

  • 2. 
    Which units of measurement are used for volume?

  • grams
  • centimeters
  • grams/milliliter
  • milliliter

  • 3. 
    If you were to smoosh down a piece of bread what would happen to its density?

  • it would decrease
  • it would increase
  • it would stay the same

  • 4. 
    For incompressible fluids, density changes little with changes in what?

  • depth
  • temperature
  • pressure
  • free-fall acceleration

  • 5. 
    Bernoulli’s principle states that the pressure in a fluid decreases as its velocity increases.

  • True
  • False

  • 6. 
    What is true about the volume of displaced fluid for an object that is completely submerged?

  • The volume of displaced fluid is equal to the object’s volume.
  • The volume of displaced fluid is less than the object’s volume.
  • The volume of displaced fluid is greater than the object’s volume.
  • The volume of displaced fluid is not related to the object’s volume.

  • 7. 
    The amount of matter in a given space is

  • buoyancy
  • fluid
  • density

  • 8. 
    If you were to smoosh a piece of bread down, what would happen to its volume?

  • it decreases
  • it increases
  • it stays the same

  • 9. 
    Frank has an eraser. It has a mass of 4g, and a volume of 2cm3. What is its density?

  • 8 g/cm3
  • 2 g/cm3
  • 1/2 g/cm3
  • 24 g/cm3

  • 10. 
    The buoyant force that acts on a 20,000-N ship is

  • somewhat less than 20,000 N.
  • 20,000 N.
  • more than 20,000 N.
  • dependent on whether it is in fresh water or salt water.

  • 11. 
    When you increase your depth under water, the water pressure on your body

  • increases
  • decreases
  • stays the same

  • 12. 
    Archimedes' principle states that the weight of the fluid an object displaces is equal to the buoyant force acting on the object.

  • True
  • False

  • 13. 
    For water...

  • 1 mL = g/mL
  • 1 mL = 1 g
  • 1 L = 1 G
  • 1 mL = 1 L
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