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Best Fluid Statics and Dynamics MCQs to Crack NEET,JEE & CUET Physics Exams

Fluid statics and dynamics mcqs form one of the most concept-heavy and application-driven chapters in physics. These fluid Statics and dynamics  mcqs topics explain how liquids and gases behave at rest and in motion, helping students understand everyday phenomena such as floating bodies, soap bubbles, water flow in pipes, capillary rise, and motion through viscous media. The fluid Statics and dynamics MCQs in this section are carefully designed to test both conceptual understanding and analytical reasoning, making them highly relevant for competitive exams like JEE, NEET, and board examinations.

Fluid statics and dynamics MCQs help students master surface tension, buoyancy, viscosity, and fluid flow concepts through application-based questions. These fluid Statics and dynamics mcqs problems reinforce Bernoulli’s principle, Archimedes’ principle, terminal velocity, and streamline flow, making them essential for competitive exams like JEE and NEET where conceptual clarity and quick reasoning are crucial.

Fluid Statics and Dynamics MCQs :

  1. If a soap bubble expands, the pressure inside the bubble
    A. Remains the same
    B. Is equal to the atmospheric pressure
    C. Decreases
    D. Increases
    Answer: C

  2. A wooden sphere is being weighed in a liquid whose temperature is continuously increased. What will happen to the apparent weight of the sphere?
    A. Increases
    B. Decreases
    C. Remains unchanged
    D. Changes erratically
    Answer: A

  3. For a body immersed in a liquid, when the weight of the body is less than the up thrust then the body will:
    A. float partially immersed
    B. sink
    C. float fully immersed
    D. be of zero weight
    Answer: A

  4. If there were no gravity, which of the following will not be there for a fluid?
    A. Viscosity
    B. Surface tension
    C. Pressure
    D. Archimedes’ upward thrust
    Answer: D

  5. A plastic tube containing few stones is floating in a tank of water. If the stones are unloaded, the water level will:
    A. remain same
    B. rise
    C. falls
    D. rises or falls depending on the number of stones unloaded
    Answer: C

  6. If some object is weighed when submerged in water, what will happen to its weight compared to its weight in air?
    A. Increased
    B. Decrease
    C. Remain exactly the same
    D. Increase or decrease cannot be predicted
    Answer: B

  7. In stream line flow of liquid, the total energy of liquid is constant at :
    A. all points
    B. inner points
    C. outer points
    D. None of these
    Answer: A

  8. Two soap bubbles of different radii are formed at the two ends of a tube and are in communication with each other through the tube. What will happen to them?
    A. Smaller bubble will grow until larger one collapses
    B. Larger bubble will grow until smaller bubble collapses
    C. Smaller bubble will grow till both have same radius
    D. Both bubbles will stay as they were
    Answer: B

  9. Water is flowing in streamline in a horizontally laid pipe of varying cross-section. At the narrowest part of the pipe,
    A. both velocity and pressure are maximum
    B. velocity is maximum but pressure is minimum
    C. velocity is minimum but pressure is maximum
    D. both velocity and pressure are minimum
    Answer: B

  10. An iron cube floats in a vessel containing mercury at 20°C. If the temperature is increased by 100°C, then the cube will float:
    A. lower
    B. higher
    C. at same level
    D. lower or higher depending on mass of cube
    Answer: A

  11. When two capillary tubes of different diameters are dipped vertically, the rise of the liquid is
    A. Less in the tube of smaller diameter
    B. More in the tube of smaller diameter
    C. More in the tube of larger diameter
    D. Same in both the tubes
    Answer: B

  12. A large water tank open to the atmosphere at the top a small hole is made near the bottom of the tank. The speed of the water ejected depends on:
    A. Height of the water below the hole
    B. Acceleration due to gravity
    C. Density of water
    D. Pressure at the top surface of water
    Answer: B

  13. Streamline flow is more likely for liquids with:
    A. High density and low viscosity
    B. Low density and high viscosity
    C. High density and high viscosity
    D. Low density and low viscosity
    Answer: B

  14. A piece of ice floating in a bucket contains water, when ice melts, the temperature:
    A. remains same
    B. changes at 4°C and level of water falls
    C. drops
    D. changes erratically
    Answer: B

  15. A liquid is filled in a flask up to a certain point. When the flask is heated, the level of the liquid:
    A. immediately starts increasing
    B. initially falls and then rises
    C. rises abruptly
    D. falls abruptly
    Answer: B

  16. Hydrostatic paradox states that the pressure exerted by a liquid:
    A. depends on the shape of the containing vessel and independent of height of liquid column
    B. depends on both shape of the container vessel and height of liquid column
    C. independent of both shape of the containing vessel and height of liquid column
    D. depends on height only and independent of the shape of the containing vessel
    Answer: D

  17. Match the following
    A. (A)IV (B)II (C)I (D)III
    B. (A)III (B)I (C)IV (D)II
    C. (A)II (B)III (C)IV (D)I
    D. (A)III (B)IV (C)II (D)I
    Answer: D

  18. If two soap bubbles of different radii are connected by a tube, then
    A. air flows from bigger bubble to the smaller bubble till sizes become equal
    B. air flows from bigger bubble to the smaller bubble till sizes are interchanged
    C. air flows from smaller bubble to bigger
    D. there is no flow of air
    Answer: C

  19. Along a streamline flow of fluid
    A. the velocity of all fluid particles at a given instant time is constant
    B. the speed of a fluid particles remains constant
    C. the velocity of all fluid particles crossing a given position is constant
    D. the velocity of a fluid particles remains constant
    Answer: C

  20. A ball floats on the surface of water in a container exposed to the atmosphere. When the container is covered and the air is partially removed, then the ball
    A. rises
    B. gets immersed more in water
    C. remains immersed at its former depth
    D. may rise or sink.
    Answer: B

  21. A body is floating partially immersed in a liquid. If the body and the liquid are taken to the moon the body will:
    A. continue to float exactly as in the earth
    B. float with a larger part immersed in the liquid
    C. float with a smaller part immersed in the liquid
    D. sink
    Answer: A

  22. When a ship floats on water:
    A. it displaces no water
    B. the mass of water displaced is equal to the mass of the ship
    C. the mass of water displaced is less than the mass of the ship
    D. the mass of water displaced is greater than the mass of the ship
    Answer: B

  23. For a steel boat floating on a lake, the weight of the water displaced by the boat is:
    A. less than the weight of the boat
    B. more than the weight of the boat
    C. equal to the weight of the part of the boat which is below the water level of the lake
    D. equal to the weight of the boat
    Answer: D

  24. When an object will float or sink in a liquid, depends on:
    A. mass of the object only
    B. mass of the object and density of liquid only
    C. difference in the densities of the object and liquid
    D. mass and shape of the object only
    Answer: C

  25. After terminal velocity is reached, the acceleration of a body falling through a fluid is:
    A. equal to g
    B. less than g
    C. greater than g
    D. constant but not zero
    Answer: B

  26. In a turbulent flow, the velocity of the liquid in contact with the walls of the tube is:
    A. zero
    B. maximum
    C. between zero and maximum
    D. equal to critical velocity
    Answer: A

  27. The flow of liquid is laminar or streamline is determined by:
    A. rate of flow of liquid
    B. density of fluid
    C. radius of the tube
    D. coefficient of viscosity of liquid
    Answer: D

  28. A viscous fluid is flowing through a cylindrical tube. The velocity distribution of the fluid is best represented by the diagram:
    A. diagram (a)
    B. diagram (b)
    C. diagram (c)
    D. (d) none of these
    Answer: C

  29. A liquid is allowed to flow into a tube of truncated cone shape. Identify the correct statement from the following:
    A. The speed is high at the wider end low at the narrow end.
    B. The speed is low at the wider end and high at the narrow end.
    C. The speed is same at both ends in a streamline flow.
    D. The liquid flows with uniform velocity in the tube.
    Answer: B

  30. Water is flowing through a pipe of constant cross-section. At some point the pipe becomes narrower and the cross-section is halved. The speed of water is:
    A. reduced to zero
    B. decreased by factor of 2
    C. increased by a factor of 2
    D. unchanged
    Answer: C

fluid Statics and dynamics mcqs

Conclusion on Fluid Statics and Dynamics MCQs

Practicing Fluid Statics  and Dynamics MCQs plays a crucial role in developing a strong and well-balanced understanding of fluid mechanics as a whole. While fluid statics focuses on fluids at rest—covering concepts such as pressure variation with depth, buoyancy, Archimedes’ principle, Pascal’s law, and hydrostatic paradox—fluid dynamics extends this understanding to fluids in motion, involving key ideas like continuity equation, Bernoulli’s principle, viscosity, terminal velocity, streamline and turbulent flow. Together, Fluid Statics and Dynamics MCQs help students connect theoretical principles with practical physical behavior observed in everyday and engineering applications.

An integrated practice of Fluid Statics and Dynamics MCQs is especially valuable for competitive examinations such as JEE, NEET, and board exams, where questions often combine fluid static and dynamic mcqs concepts within a single problem. For example, a scenario may involve buoyancy along with fluid flow or pressure changes linked to motion. Fluid statics and dynamics MCQs prepare students to identify governing principles instantly, apply correct formulas, and avoid common conceptual traps.

In conclusion, consistent practice of Fluid Statics and Dynamics MCQs forms a strong foundation in fluid mechanics, boosts confidence, and ensures readiness to tackle both conceptual and numerical questions efficiently. Mastery of these fluid Statics and dynamics MCQs equips students with clarity, speed, and precision—key attributes required for success in physics examinations and future scientific pursuits.

 

 

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