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Class 11 Physics — Chapter 10: Mechanical Properties of Fluids Online Test

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Class 11 Physics: Mechanical Properties of Fluids Online Test (Paper 1)

Welcome to Paper 1! This is your foundation to build confidence and get you ready to tackle the challenges ahead.

  • Total Questions: 20
  • Time Allotted: 30 minutes
  • Passing Score: 40%
  • Randomization: No
  • Certificate: No
  • Retake: Allowed
  • Price: 100% Free

Good luck! 👍

1 / 20

1. A soap bubble of radius is formed. Surface tension is . Calculate excess pressure inside the bubble.

2 / 20

2. A U-tube manometer contains mercury () and is connected to a pipeline carrying water. The difference in mercury levels is . Find gauge pressure in the pipe. (g = 9.8)

3 / 20

3. Which phenomenon demonstrates detergent’s role in reducing surface tension?

4 / 20

4. In bubbles, why is the pressure inside greater than outside?

5 / 20

5. Which of the following phenomena is due to poor wetting?

6 / 20

6. Which instrument is used to measure the angle of contact accurately?

7 / 20

7. A square wire frame of side is dipped into a soap solution and lifted out, forming a soap film. If surface tension is , find the work required to break the film.

8 / 20

8. A liquid rises to height in a capillary of radius . If , find surface tension.

9 / 20

9. The drop weight method of measuring surface tension is based on:

10 / 20

10. A water jet of velocity comes out of a pipe at ground level. Using Bernoulli’s principle, find the maximum height it can reach. ()

11 / 20

11. Kerosene () flows at velocity in a 0.03 m diameter pipe. Calculate Reynolds number.

12 / 20

12. Water () flows at velocity through a pipe of diameter . Calculate Reynolds number.

13 / 20

13. If the Reynolds number for flow in a pipe is 800, the flow is:

14 / 20

14. Water of density and viscosity flows through a pipe of diameter with average velocity . Calculate the Reynolds number and state the flow type.

15 / 20

15. Oil () flows in a tube of diameter at velocity . Calculate Reynolds number.

16 / 20

16. What will happen to the height of the mercury column in a barometer if taken to the top of a mountain?

17 / 20

17. A tank has oil of density up to a height of 5 m. Find the pressure at the bottom due to oil. (Take )

18 / 20

18. A solid block of area rests at the bottom of a tank 10 m deep filled with water. Find the total force acting on the top surface of the block. (Take )

19 / 20

19. In airplane hydraulic systems, Pascal’s principle is used to:

20 / 20

20. A container is filled with water () to a height of 10 m. Find the hydrostatic pressure at the bottom. (Take )

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Class 11 Physics: Mechanical Properties of Fluids Online Test (Paper 2)

Welcome to Paper 2! You’ve mastered the basics, and now it’s time to test your understanding with a more challenging set of questions.

Get new questions on each attempt

  • Total Questions: 30
  • Time Allotted: 45 minutes
  • Passing Score: 50%
  • Randomization: Yes
  • Certificate: No
  • Retake: Allowed
  • Price: 100% Free

Good luck! 👍

1 / 30

1. If surface tension of water is , find surface energy per unit area.

2 / 30

2. Which law/equation is more applicable in laminar pipe flow?

3 / 30

3. A Venturi meter has a throat diameter of 0.1 m and main diameter of 0.2 m. If pressure drop is , calculate discharge. ()

4 / 30

4. A dam holds back water of depth 50 m. Calculate the hydrostatic pressure at the base. ()

5 / 30

5. Bernoulli’s principle cannot be applied in:

6 / 30

6. Surface energy of a liquid surface is defined as:

7 / 30

7. At very low temperatures, surface tension of liquids is generally:

8 / 30

8. A hydraulic lift has a large piston of area and a small piston of area . If a car of mass 1500 kg is to be lifted, calculate minimum force on small piston.

9 / 30

9. Which equation describes the behavior of gases but not liquids?

10 / 30

10. The variation of pressure with height in a fluid under gravity is expressed as:

11 / 30

11. Stokes’ law is valid only when the Reynolds number is:

12 / 30

12. Which of the following examples best demonstrates turbulent flow?

13 / 30

13. For liquids, which property has the greatest effect on viscosity?

14 / 30

14. Which of the following is NOT an application of the Venturi effect?

15 / 30

15. Which property of bubbles is most important in ultrasound imaging?

16 / 30

16. The derivation of Bernoulli’s equation starts with which fundamental law?

17 / 30

17. Which of the following factors increases the chance of turbulent flow?

18 / 30

18. When Reynolds number approaches infinity (), it implies:

19 / 30

19. If Reynolds number is less than 2000, the flow is:

20 / 30

20. In streamline flow, the velocity at a point is:

21 / 30

21. A spherical drop of radius is divided into smaller drops of equal size. If the initial surface energy was , what is the final surface energy?

22 / 30

22. Which property explains why gases are highly compressible compared to liquids?

23 / 30

23. In a hydraulic press, a force of 200 N is applied on a piston of area . The area of the larger piston is . What is the output force?

24 / 30

24. Which of the following correctly explains the working of hydraulic jacks?

25 / 30

25. Why does a gas exert uniform pressure in all directions inside a container, unlike a liquid?

26 / 30

26. Which factor is responsible for mercury showing a depression in a capillary tube?

27 / 30

27. In a hydraulic system, the input piston area is and the output piston area is . If an input force of 100 N is applied, calculate the output force.

28 / 30

28. A capillary of radius is dipped in water at 20°C. Find the rise of water. (Surface tension = 0.072 N/m, density = 1000, g = 9.8, )

29 / 30

29. The condition for reaching terminal velocity depends strongly on:

30 / 30

30. In a hydraulic press, the input piston has an area of . A force of 100 N is applied on it. If the output piston has an area of , calculate the load lifted.

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Class 11 Physics: Mechanical Properties of Fluids Online Test (Paper 3)

Welcome to Paper 3! You’ve warmed up—now it's time to step up your game and conquer the challenge with tougher questions!

Earn a certificate upon passing

Get new questions with every attempt

  • Total Questions: 50
  • Time Allotted: 75 minutes
  • Passing Score: 70%
  • Randomization: Yes
  • Certificate: Yes
  • Retake: Allowed
  • Price: 100% Free

Good luck! 👍

1 / 50

1. In Reynolds’ experiment, the flow is laminar when the dye filament:

2 / 50

2. Why do ships made of steel float on water despite being denser than water?

3 / 50

3. The condition for reaching terminal velocity depends strongly on:

4 / 50

4. Which condition leads to maximum capillary rise?

5 / 50

5. Which of the following fluids is often modeled as non-Newtonian in biological studies?

6 / 50

6. Liquids transmit pressure equally in all directions because:

7 / 50

7. Stokes’ law is applied in sedimentation to:

8 / 50

8. A liquid jet emerges from a hole at velocity . Find maximum height the jet can reach. (g = 9.8)

9 / 50

9. The unit of Reynolds number is:

10 / 50

10. A water jet of cross-section 2 cm² comes out at velocity 20 m/s. Find thrust on the wall if it strikes normally and comes to rest. (ρ=1000)

11 / 50

11. In a hydraulic system, the input piston area is and the output piston area is . If an input force of 100 N is applied, calculate the output force.

12 / 50

12. Which of the following instruments is most suitable for measuring viscosity of highly viscous liquids like tar or bitumen?

13 / 50

13. In detergent cleaning, grease is removed because:

14 / 50

14. The gauge pressure at 50 m depth in the ocean () is: (Take )

15 / 50

15. An input piston of area is used to apply a force of 60 N. Find the pressure and also the force produced on an output piston of area .

16 / 50

16. Water flows through a horizontal pipe. At a point, velocity = and pressure = . At another point where velocity = , find the pressure. ()

17 / 50

17. Which of the following applications is explained by surface tension in fluids?

18 / 50

18. If the radius of a capillary tube is halved, the height of capillary rise:

19 / 50

19. In ultrasound imaging, stability of bubbles is improved by:

20 / 50

20. A liquid rises to height in a capillary of radius . If , find surface tension.

21 / 50

21. In micelle formation, the orientation of detergent molecules is such that:

22 / 50

22. A tank has kerosene of density to a height of 4 m. Calculate the hydrostatic pressure at the bottom. (Take )

23 / 50

23. Which of the following conditions is required for Stokes’ law to hold?

24 / 50

24. Detergents are more effective in hot water because:

25 / 50

25. If air pressure at sea level is , what is the approximate air pressure at a height of 5 km? (Assume , with scale height ).

26 / 50

26. A barometer reads 74 cm of Hg in a city. What is the atmospheric pressure in pascals? (Take , )

27 / 50

27. In a U-tube manometer, if both ends are open to the atmosphere, the mercury levels in both arms:

28 / 50

28. A water droplet forms a spherical shape in air mainly due to:

29 / 50

29. If atmospheric pressure is , what is the total pressure at 30 m depth in water? (Take )

30 / 50

30. A steel ball of radius falls in oil of viscosity . If density difference is , calculate its terminal velocity.

31 / 50

31. A hydraulic lift has a large piston of area and a small piston of area . If a car of mass 1500 kg is to be lifted, calculate minimum force on small piston.

32 / 50

32. A steel ball of radius is released in oil and attains a terminal velocity of . If the radius is doubled, its new terminal velocity will be approximately:

33 / 50

33. In particle size analysis, smaller particles settle more slowly because:

34 / 50

34. Which of the following methods is commonly used to measure surface tension of a liquid?

35 / 50

35. Which phenomenon marks the beginning of turbulence during flow transition?

36 / 50

36. When a small sphere falls in a viscous fluid, it eventually reaches terminal velocity because:

37 / 50

37. The instrument commonly used to measure viscosity of liquids in laboratories is:

38 / 50

38. Which factor is directly measured in all experimental methods of surface tension?

39 / 50

39. A hydraulic brake system applies a pressure of to the brake shoes. If the area of each brake piston is , what force acts on each brake shoe?

40 / 50

40. Which principle explains why toothpaste can be squeezed out of a closed tube by pressing at any point?

41 / 50

41. Effect of pressure on viscosity of liquids is generally:

42 / 50

42. In a Venturi meter, Bernoulli’s principle is applied to measure:

43 / 50

43. In sedimentation analysis, the viscosity of the medium must be known because:

44 / 50

44. A diver descends to 30 m depth in seawater of density . Find the gauge pressure at that depth. ()

45 / 50

45. The mathematical form of Bernoulli’s equation is:

46 / 50

46. Bernoulli’s principle cannot be applied in:

47 / 50

47. A gas flows at in a duct of diameter . If density = and viscosity = , calculate Reynolds number.

48 / 50

48. For Reynolds number equal to 2500, the flow regime is:

49 / 50

49. For an aircraft at high speed, turbulence is beneficial because:

50 / 50

50. A raindrop attains terminal velocity while falling through air because:

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Practice Mechanical Properties of Fluids MCQs
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Class 11 Physics — Chapter 10: Mechanical Properties of Fluids Online Test

The Mechanical Properties of Fluids Online Test is a perfect way for Class 11 students to understand how liquids and gases behave under different conditions of pressure and flow. This chapter beautifully connects real-life applications like flying of airplanes, floating of ships, and working of hydraulic brakes with Physics principles. By solving MCQs on Mechanical Properties of Fluids, you will gain a deeper understanding of Pascal’s law, Bernoulli’s theorem, viscosity, surface tension, and buoyancy.

These tests are based on the NCERT Class 11 Physics Chapter 10 and follow the latest CBSE and competitive exam pattern. Each test paper is timed, automatically checked, and shows your results instantly. Whether you are preparing for school exams, JEE, or NEET, this online test helps you evaluate your strengths and improve your weak areas through practice.

The test format is designed to make you feel like you are in a real exam environment. Each question is carefully prepared to test your clarity of formulas and concepts. Students who practice these questions regularly develop better visualization and analytical thinking — especially in numerical topics like fluid pressure, flow rate, and capillary action.

About this Online Test

The Chapter 10 Online Test is divided into three progressive papers. Start with basics, then move to mixed problems, and finally test your complete understanding with challenging questions.

  • Paper 1 — Basic Concepts: 20 questions · 30 min · Pass ≥ 40%
  • Paper 2 — Mixed Practice: 30 questions · 45 min · Pass ≥ 50% · New questions each attempt
  • Paper 3 — Advanced Challenge: 50 questions · 75 min · Pass ≥ 70% · Certificate after pass

Papers 2 and 3 bring fresh sets of questions on each reattempt, while Paper 1 remains fixed for quick revision. All tests include automatic evaluation, instant score display, and complete answer review.

Key Topics Covered (Mechanical Properties of Fluids)

  • Density and pressure of fluids
  • Pascal’s law and hydraulic lift applications
  • Archimedes’ principle and buoyancy
  • Bernoulli’s theorem and its practical uses
  • Equation of continuity and streamlines
  • Viscosity and Stoke’s law
  • Surface tension and capillary rise
  • Reynolds number and flow of liquids

Why You Should Take This Test

Many students find fluid mechanics confusing because they can’t visualize how pressure, force, and flow are related. This online test turns theory into understanding through simple but effective MCQs. It helps you:

  • Revise all major formulas related to fluid mechanics
  • Strengthen concepts of pressure, buoyancy, and viscosity
  • Develop logical thinking for problem-solving
  • Track improvement through instant scoring and retakes
  • Build accuracy and speed for board and competitive exams

Who Should Attempt

  • Class 11 CBSE/NCERT students revising Chapter 10
  • JEE and NEET aspirants preparing for Mechanics-based questions
  • Students who want more practice in numerical and conceptual topics
  • Teachers looking for ready-to-use timed chapter tests

Preparation Tips for Chapter 10 — Mechanical Properties of Fluids

  • Understand pressure-depth relation and Pascal’s law clearly.
  • Practice numerical problems on Bernoulli’s equation and continuity equation.
  • Revise definitions of viscosity, surface tension, and capillary action.
  • Attempt Paper 1 for concepts, Paper 2 for accuracy, and Paper 3 for full-chapter mastery.
  • Reattempt weak areas until you can solve questions confidently within time.

Before You Start

  • Use updated Chrome or Edge browser for smooth access.
  • Keep your internet connection stable during the test.
  • Don’t refresh or close the tab while attempting the paper.

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