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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. A liquid flows in a 4 cm diameter pipe with velocity . If its density = and viscosity = , calculate Reynolds number.

2 / 30

2. Hydraulic brakes work efficiently because:

3 / 30

3. A sphere of radius falls through glycerin with a terminal velocity of . If the density of the sphere is and the density of glycerin is , calculate the viscosity of glycerin. (Take )

4 / 30

4. A falling sphere in a viscous fluid reaches terminal velocity when:

5 / 30

5. In medical applications, the Venturi mask works on the Venturi effect to:

6 / 30

6. Who introduced the concept of Reynolds number through an experiment on flow visualization?

7 / 30

7. Mercury in a glass capillary tube shows a contact angle of about:

8 / 30

8. Why does dishwashing become more effective with hot water and detergent?

9 / 30

9. Which of the following best distinguishes liquids from gases?

10 / 30

10. A hydraulic jack has an input piston of radius 2 cm and an output piston of radius 20 cm. If a force of 100 N is applied on the smaller piston, find the output force.

11 / 30

11. 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:

12 / 30

12. Which physical property directly causes viscosity in fluids?

13 / 30

13. In metallurgy, why is surface tension important?

14 / 30

14. Why is fluid mechanics essential in chemical engineering?

15 / 30

15. If a liquid has an obtuse angle of contact, then in a capillary tube it will:

16 / 30

16. The height of liquid rise in a capillary is given by:

17 / 30

17. Why do paper towels absorb water?

18 / 30

18. A sphere of radius is falling in a fluid of viscosity . If its terminal velocity is and density difference between sphere and fluid is , verify Stokes’ law. ()

19 / 30

19. Which real-life example can be explained using Bernoulli’s principle?

20 / 30

20. Wetting of glass by water is an example of:

21 / 30

21. Why are detergents more effective in hard water compared to soaps?

22 / 30

22. Why do larger drops flatten at the bottom instead of remaining spherical?

23 / 30

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

24 / 30

24. Which principle of fluid mechanics is applied in hydraulic brakes of automobiles?

25 / 30

25. Which of the following is NOT a pressure-measuring device?

26 / 30

26. In capillary action, the rise of liquid is possible only if the angle of contact is:

27 / 30

27. Which of the following explains why two containers of different shapes but same depth have the same pressure at the bottom?

28 / 30

28. A hydraulic lift is used to raise a car of mass 1200 kg. If the area of the larger piston is , calculate the pressure required in the system. (Take )

29 / 30

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

30 / 30

30. A tank contains oil of density . If the depth of oil is 3 m, what pressure does it exert at the bottom? (Take )

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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. For a particle to reach terminal velocity, the Reynolds number should be:

2 / 50

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

3 / 50

3. A spherical raindrop of radius falls at terminal velocity. Density of water , density of air negligible, viscosity of air . Find terminal velocity.

4 / 50

4. In ink pens, ink rises into the nib due to:

5 / 50

5. A hydraulic lift has a mechanical advantage of 50. If an input force of 200 N is applied, the output force is:

6 / 50

6. The spherical shape of small liquid drops is due to:

7 / 50

7. Why do hydraulic brakes work more efficiently than mechanical brakes?

8 / 50

8. A spherical water drop of radius is broken into 8 equal droplets. Calculate the increase in surface energy if surface tension is .

9 / 50

9. If the atmospheric pressure is 760 mm Hg, what is the corresponding pressure in pascals? (Take , )

10 / 50

10. The Redwood viscometer is used to measure:

11 / 50

11. A liquid of density and viscosity flows in a pipe of diameter . If velocity = , calculate Reynolds number.

12 / 50

12. Which of the following is NOT a unit of pressure?

13 / 50

13. Why do cavitation bubbles near a solid surface cause severe damage?

14 / 50

14. A crude oil sample has density and viscosity . If it flows with velocity in a 5 cm diameter pipe, calculate Reynolds number.

15 / 50

15. Which of the following is almost incompressible?

16 / 50

16. In carburetors, the Venturi effect helps by:

17 / 50

17. A fluid of viscosity flows through a capillary of length 0.1 m and radius 0.001 m under a pressure difference of 100 Pa. Find the volume flow rate.

18 / 50

18. If velocity of fluid is doubled in a pipe, Reynolds number:

19 / 50

19. Atomizers used in perfumes and sprays work on Bernoulli’s principle because:

20 / 50

20. A small sphere falls in oil and reaches a terminal velocity of . If the radius of the sphere is doubled, keeping all other factors same, the new terminal velocity is:

21 / 50

21. The absolute pressure at 10 m depth in water is: (Take )

22 / 50

22. Why are soap bubbles spherical in shape?

23 / 50

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

24 / 50

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

25 / 50

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

26 / 50

26. Which of the following best distinguishes liquids from gases?

27 / 50

27. A raindrop of radius falls through air (, ). If density of water = , find its terminal velocity.

28 / 50

28. A 4 cm radius pipe carries water at 2 m/s. It branches into two pipes each of radius 2 cm. Find velocity in each branch.

29 / 50

29. A spherical raindrop of radius falls at terminal velocity. Viscosity of air = , density of water , air density negligible. Find terminal velocity. (g = 9.8)

30 / 50

30. Which of the following is independent of the shape of the container?

31 / 50

31. A velocity of is observed at the throat of a Venturi meter with inlet velocity . Find the pressure difference. ()

32 / 50

32. The density of gases is generally much lower than liquids because:

33 / 50

33. A cube of side 0.2 m is immersed fully in water. If water density is , calculate the force acting on the top face at depth 2 m. (Take )

34 / 50

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

35 / 50

35. In applying Stokes’ law to very small particles like colloids, which factor limits its accuracy?

36 / 50

36. Which of the following corresponds to complete non-wetting of a surface?

37 / 50

37. Water flows through a horizontal pipe of cross-sectional areas and . If the velocity in the wider section is , find the velocity in the narrow section.

38 / 50

38. A cylindrical vessel is filled with oil () up to 6 m height. Find the hydrostatic pressure at the bottom. (Take )

39 / 50

39. Reynolds number is defined as the ratio of:

40 / 50

40. A force of 50 N acts on a surface of area 0.25 m. What is the pressure exerted?

41 / 50

41. In soil, capillary rise is more effective when:

42 / 50

42. When two bubbles of unequal radii are connected, air flows:

43 / 50

43. Which phenomenon in bubble dynamics is useful in cleaning delicate instruments (like surgical tools)?

44 / 50

44. A liquid flows through a capillary tube of radius and length . If the flow rate is under a pressure difference of , calculate its viscosity.

45 / 50

45. If velocity of a fluid doubles, Reynolds number will:

46 / 50

46. Which real-life example can be explained using Bernoulli’s principle?

47 / 50

47. A ball of radius is dropped in a fluid and experiences a viscous drag of . If its velocity is , find the viscosity of the fluid.

48 / 50

48. A simple U-tube manometer contains mercury and is connected to a gas container. If the mercury level difference between two arms is 20 cm and the atmospheric pressure is 76 cm Hg, then the gas pressure is:

49 / 50

49. The height of water column in a barometer tube is 10 m. If replaced with mercury, what will be the height? ()

50 / 50

50. Which of the following is NOT explained by Bernoulli’s principle?

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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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