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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 ball of radius falls through a fluid and attains terminal velocity of . If the viscosity of the fluid is and density of fluid = , density of ball = ?

2 / 30

2. For , the flow is:

3 / 30

3. How does viscosity of gases vary with temperature?

4 / 30

4. The pressure difference between two points at heights and in a liquid is:

5 / 30

5. If the pressure difference between two points in a horizontal pipe is , and velocities are and , find the density of the fluid.

6 / 30

6. A horizontal tube of cross-sectional area carries water at a velocity of . The tube narrows to a cross-sectional area of . Find the pressure drop between the wide and narrow sections. ()

7 / 30

7. At terminal velocity, the acceleration of the falling body is:

8 / 30

8. Which natural phenomenon ensures seeds in soil can absorb moisture even without rainfall?

9 / 30

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

10 / 30

10. Why can some insects walk on the surface of water?

11 / 30

11. A small ball of radius has a terminal velocity of in a liquid of viscosity . If density of liquid = , calculate density of the ball.

12 / 30

12. Why does a soap film contract after formation?

13 / 30

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

14 / 30

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

15 / 30

15. Two soap bubbles of radii and are joined by a tube. Which bubble will shrink?

16 / 30

16. In Bernoulli’s equation, the potential energy per unit volume is expressed as:

17 / 30

17. An air bubble rises from the bottom of a lake 40 m deep. If atmospheric pressure is , find the pressure inside the bubble at the bottom. (Take )

18 / 30

18. When smoke from incense suddenly starts swirling after some height, it indicates flow has entered:

19 / 30

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

20 / 30

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

21 / 30

21. A cube of side 20 cm is immersed in water. Find difference in pressure between top and bottom faces. (ρ=1000, g=9.8)

22 / 30

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

23 / 30

23. 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.

24 / 30

24. Which instrument is used in aircraft cabins to regulate pressure by comparing internal and external air pressure?

25 / 30

25. If the diameter of a pipe is halved while keeping velocity and other factors constant, the Reynolds number will:

26 / 30

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

27 / 30

27. A horizontal pipe carries water with a speed of at pressure . At a constriction, speed rises to . Find pressure at the constriction. ()

28 / 30

28. Air flows in a duct of diameter with velocity . If air density = and viscosity = , calculate Reynolds number.

29 / 30

29. Two spheres of radii and are dropped in the same viscous liquid. What is the ratio of their terminal velocities?

30 / 30

30. The working of a perfume spray is based on:

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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. A hydraulic lift has a small piston of area and a large piston of area . If a force of 200 N is applied on the small piston, what load can be lifted on the large piston?

2 / 50

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

3 / 50

3. Ocean currents typically belong to which Reynolds number regime?

4 / 50

4. Kerosene oil of density and viscosity flows through a pipe of diameter with velocity . Calculate Reynolds number.

5 / 50

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

6 / 50

6. Which principle does an Ostwald viscometer use for viscosity measurement?

7 / 50

7. Which relation shows the temperature dependence of viscosity of gases (Sutherland’s formula)?

8 / 50

8. Which of the following conditions favors transition to turbulence?

9 / 50

9. In a pipe, velocity of water is at pressure . At another point, velocity is . Find pressure at the second point. ()

10 / 50

10. In practical systems, the exact critical Reynolds number for transition:

11 / 50

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

12 / 50

12. A column of mercury of height 76 cm balances atmospheric pressure. If density of mercury = and , calculate the atmospheric pressure.

13 / 50

13. Which application of Bernoulli’s principle is used in carburetors of vehicles?

14 / 50

14. For , the flow is:

15 / 50

15. A ball of radius falls in oil of viscosity with a velocity . If density difference between ball and oil is , check if this velocity is terminal velocity using Stokes’ law. ()

16 / 50

16. A raindrop falling through air does not keep accelerating but soon moves with a constant velocity because:

17 / 50

17. Which of the following conditions must be satisfied for terminal velocity to be achieved?

18 / 50

18. The transition from laminar to turbulent flow in a pipe occurs when:

19 / 50

19. Which of the following decreases the height of capillary rise?

20 / 50

20. A car weighing is lifted using a hydraulic lift. The large piston has an area of . What minimum force is required on the small piston of area ?

21 / 50

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

22 / 50

22. Water on a wax-coated leaf shows contact angle closer to:

23 / 50

23. Why do detergents work better in hot water?

24 / 50

24. Which of the following is almost incompressible?

25 / 50

25. Bernoulli’s principle is derived from the principle of:

26 / 50

26. Sedimentation techniques using Stokes’ law are useful in:

27 / 50

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

28 / 50

28. Which law of fluid mechanics applies strictly to Newtonian fluids but not to non-Newtonian fluids?

29 / 50

29. The equation of motion for a small sphere falling in a viscous fluid before reaching terminal velocity is:

30 / 50

30. The relationship between surface energy and surface tension is:

31 / 50

31. The SI unit of surface tension is:

32 / 50

32. Why does mercury form a convex meniscus in glass tubes?

33 / 50

33. A capillary tube of radius is dipped in water (). Assuming , calculate the rise of water in the tube.

34 / 50

34. Which assumption of Bernoulli’s theorem is not valid in turbulent flow?

35 / 50

35. Reynolds number is a ratio of:

36 / 50

36. Which of the following decreases surface tension of water?

37 / 50

37. A hydraulic jack has an input piston of radius 5 cm and an output piston of radius 20 cm. If a force of 200 N is applied on the input piston, calculate the output force.

38 / 50

38. Adhesives stick better to surfaces when:

39 / 50

39. Which of the following devices is used to measure the pressure of a gas in a closed container?

40 / 50

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

41 / 50

41. In carburetors, the Venturi effect helps by:

42 / 50

42. For blood flow in an artery (), diameter = , velocity = . Calculate Reynolds number.

43 / 50

43. Which of the following is a limitation of Bernoulli’s principle?

44 / 50

44. The work required to blow a soap bubble of radius with surface tension is:

45 / 50

45. Which statement is correct about the relation between surface tension and surface energy?

46 / 50

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

47 / 50

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

48 / 50

48. Why do paper towels absorb water?

49 / 50

49. A container holds water of density up to a height of 4 m. What is the pressure at the bottom of the container due to water? (Take )

50 / 50

50. For a water droplet of radius , excess pressure inside is:

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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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