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MDCAT Physics Fluid Dynamics Test Online

Mustansar KhanLast Updated: June 16, 2025

Physics Fluid Dynamics MCQS Online Test

MDCAT Physics Fluid Dynamics Chapter Online Test

Total Questions:	49
Time Allowed:	25 Minutes
Total Marks:	49
How to Attempt Test:	Please choose the right Option in MCQ-type question.
Test Helpful For:	MDCAT Entry Test Physics Online Test Interview Questions about Physics All Universities Entrance Test Recruitments Tests

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1. Which fluid property affects drag the most?

Color

Density

Transparency

Odor

2. Which of the following best represents a real-world example of terminal velocity?

A ball rolling on a table

A stone thrown upward

A parachutist falling at constant speed

A car accelerating on a highway

3. Which term describes motion at constant velocity through a fluid?

Uniform motion

Free motion

Terminal motion

Accelerated motion

4. The direction of drag force is always:

Opposite to motion

Along velocity

Downward

Perpendicular to motion

5. Which of the following is not a factor in determining fluid drag?

Color of object

Shape of object

Density of fluid

Speed of object

6. Which quantity becomes constant at terminal velocity?

Mass

Velocity

Acceleration

Momentum

7. What is the terminal velocity of an object dependent on?

Sound produced

Object’s shape, size, and mass

Volume only

Color and texture

8. The drag force acting on an object is caused by:

The relative motion between the object and fluid

Buoyancy

The object’s mass

Gravitational field

9. What happens to terminal velocity in a vacuum?

Becomes infinite

Increases

Does not exist

Decreases

10. If mass increases but surface area remains constant, terminal velocity:

Becomes zero

Decreases

Increases

Stays constant

11. Which of the following increases both buoyant force and drag?

Increased color

Increased mass

Decreased density

Increased volume

12. How can terminal velocity be increased?

Decrease surface area

Decrease object mass

Increase surface area

Increase fluid density

13. Terminal velocity occurs when:

Drag force = weight

Drag force = 0

No force acts on the object

Drag force > weight

14. The faster an object moves through a fluid, the:

Greater the drag

Less the drag

Lower the pressure

More the lift

15. What happens to acceleration after terminal velocity is reached?

Becomes negative

Becomes zero

Increases

Decreases

16. How does fluid viscosity affect terminal velocity?

Increases it

Decreases it

Makes it infinite

Has no effect

17. At terminal velocity, which of the following is true?

Speed keeps increasing

Acceleration is zero

Acceleration is constant

Speed is zero

18. Which of the following best describes fluid drag?

Force of gravity in fluid

Upthrust acting downward

Resistance force exerted by fluid

Attractive force in liquids

19. What is the relation between drag force and velocity for a spherical object in laminar flow?

Proportional to square of velocity

Directly proportional to velocity

Independent of velocity

Inversely proportional to velocity

20. The net force on an object falling at terminal velocity is:

Equal to air resistance

Equal to weight

Negative

Zero

21. What is drag?

Centripetal force

Upward force acting in vacuum

Frictional force exerted by fluids

Downward force in a solid

22. In which fluid will a ball fall with the lowest terminal velocity?

Air

Oil

Honey

Water

23. Which of the following objects will have the lowest terminal velocity?

Iron rod

Water droplet

Smooth steel ball

Parachute

24. What does a higher viscosity fluid mean for an object falling through it?

Greater resistance

No change in velocity

Less resistance

Constant acceleration

25. Which law explains the viscous drag on small spheres in a fluid?

Archimedes' Law

Bernoulli’s Principle

Newton’s Second Law

Stokes’ Law

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26. Which object is most affected by air resistance?

Iron nail

Flat sheet of paper

Plastic ball

Glass marble

27. How does terminal velocity vary with mass?

Inversely proportional

Constant

Directly proportional

Not related

28. How is terminal velocity useful in designing parachutes?

Helps increase falling speed

Helps reduce upward motion

Eliminates the effect of gravity

Helps control and limit descent speed

29. Which of the following affects terminal velocity?

Shape and surface area

Temperature of the object

Volume only

Color of the object

30. What does ‘ρ’ represent in Stokes' Law?

Viscosity

Object radius

Density of the object

Fluid density

31. Which of the following factors increases drag on a moving object?

Increasing surface smoothness

Decreasing speed

Reducing area

Increasing fluid density

32. What is terminal velocity?

The highest speed of a car

The maximum constant speed of a falling object in a fluid

The speed of sound

The speed at which pressure becomes zero

33. What happens to drag force as velocity increases in turbulent flow?

Remains constant

Decreases

Increases with square of velocity

Becomes zero

34. Which force balances weight at terminal velocity?

Drag force

Normal force

Electromagnetic force

Centrifugal force

35. If a skydiver opens their parachute, what happens to their terminal velocity?

Stays the same

Decreases

Increases

Becomes zero

36. How does an object behave in fluid if drag force is less than weight?

It comes to rest

It floats

It accelerates downward

It sinks with constant velocity

37. What causes a skydiver to reach terminal velocity?

Constant acceleration

Air resistance increasing with speed

Gravity only

Lack of friction

38. Which of the following is an incorrect statement about fluid drag?

It is absent in a vacuum

It depends on velocity

It increases when mass increases

It always acts opposite to motion

39. In which situation is fluid drag negligible?

Rain falling

Stone in water

Skydiver falling

Vacuum

40. Which of these equations best expresses terminal velocity (vₜ) under Stokes’ law for a sphere?

vₜ = (rη)/(2ρg)

vₜ = (2r²g(ρ - σ)) / 9η

vₜ = mg/r²

vₜ = ηg/ρ

41. What is the SI unit of drag force?

Newton

Joule

Pascal

Watt

42. At what point does an object stop accelerating during free fall?

When net force becomes zero

Just before hitting the ground

At the beginning of fall

At maximum height

43. Why does a feather fall slower than a stone?

Higher drag to weight ratio

More mass

Stronger gravity

Less weight

44. Which force opposes the motion of an object moving through a fluid?

Drag force

Normal force

Magnetic force

Gravitational force

45. Which object would reach terminal velocity the quickest when dropped from the same height?

Crumpled paper

Feather

Steel ball

Wooden cube

46. What is the shape of an object that experiences minimum drag?

Streamlined

Flat

Irregular

Spherical

47. Which factor will decrease the terminal velocity of a falling object?

Increasing its mass

Increasing its surface area

Increasing gravitational acceleration

Decreasing fluid viscosity

48. What happens to the net force on an object at terminal velocity?

It increases linearly

It becomes maximum

It becomes zero

It equals the weight

49. Which term refers to the force opposing motion through water?

Fluid drag

Tension

Friction

Compression

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Mustansar KhanLast Updated: June 16, 2025

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MDCAT Physics Fluid Dynamics Test Online

Physics Fluid Dynamics MCQS Online Test

MDCAT Physics Fluid Dynamics Chapter Online Test

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Physics Fluid Dynamics MCQS Online Test

MDCAT Physics Fluid Dynamics Chapter Online Test

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Mustansar Khan

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