Bernoulli’s principle and applications - One Line Questions

1. In a horizontal pipe, if the velocity of an ideal fluid doubles, the dynamic pressure increases by a factor of: — 4
2. An airplane wing is designed such that the air flowing over the top surface moves faster than the air flowing under the bottom surface. This difference in velocity leads to: — An upward lift force
3. The equation P + (1/2)ρv^2 + ρgh = constant holds true for: — Incompressible, non-viscous, steady, and irrotational flow
4. A Bunsen burner uses the principle of entrainment, where a fast-moving stream of gas draws in surrounding air. This phenomenon is explained by: — Bernoulli's principle
5. The principle behind the working of an atomizer is that when air is blown rapidly over the top of a vertical tube dipped in a liquid, the pressure above the liquid surface decreases, causing the liquid to rise. This is an application of: — Bernoulli's principle
6. The term 'steady flow' in Bernoulli's principle implies that the fluid velocity at any point: — Remains constant with time.
7. Consider a fluid flowing through a pipe. If the pipe narrows, the fluid velocity will: — Increase
8. The lift generated by an airplane wing is proportional to the square of the: — All of the above
9. When a person stands near a fast-moving train, they are often pulled towards the train. This is explained by: — Bernoulli's principle
10. Which of the following is an application of Bernoulli's principle related to air flow? — Chimney draft
11. A chimney works effectively because the wind blowing over the top creates a region of: — Low pressure and high velocity
12. Consider a fluid flowing in a wide pipe, and then entering a narrow pipe. According to Bernoulli's principle, the pressure in the narrow pipe will be: — Lower than in the wide pipe
13. When water flows through a pipe that suddenly narrows, the pressure at the narrow section is: — Lower than in the wider section
14. According to Bernoulli's principle, for a horizontal flow of an ideal fluid, if the velocity of the fluid increases, its pressure will: — Decrease
15. The flow of blood in arteries is an example where Bernoulli's principle plays a role, especially when the artery constricts. In such a constriction, the blood pressure tends to: — Decrease significantly
16. In a horizontal pipe, for a fluid flow, if the velocity is constant, then the pressure: — Remains constant.
17. If a fluid is flowing through a pipe and its velocity decreases, what happens to its pressure (assuming horizontal flow)? — It increases.
18. What happens to the pressure of a fluid as its speed increases, according to Bernoulli's principle? — It decreases proportionally.
19. Bernoulli's equation relates pressure, velocity, and height for a fluid in motion. What does the term 'P' represent in the equation P + (1/2)ρv^2 + ρgh = constant? — Static pressure
20. The term 'ρgh' in Bernoulli's equation signifies: — Potential energy per unit volume (hydrostatic pressure)
21. Bernoulli's principle is a direct application of which fundamental law of physics? — Law of Conservation of Energy
22. Which of the following is NOT an application of Bernoulli's principle? — Flow of water from a dam
23. When an object moves through a fluid, it experiences a drag force. Bernoulli's principle helps explain the pressure distribution around the object, contributing to this force. Specifically, the pressure on the front of the object is generally: — Higher than the pressure on the rear.
24. In a horizontal pipe of varying cross-section, the fluid pressure is lowest where the fluid velocity is: — Highest
25. If the velocity of a fluid is zero, the dynamic pressure term in Bernoulli's equation is: — Zero
26. The phenomenon of a spinning ball curving in flight (Magnus effect) is a consequence of: — Bernoulli's principle
27. In the context of Bernoulli's equation, the term 'dynamic pressure' refers to: — (1/2)ρv^2
28. Which term in Bernoulli's equation represents the pressure due to the height of the fluid column? — ρgh
29. If the density of the fluid (ρ) is zero, Bernoulli's equation simplifies to: — P = constant
30. What is the unit of the quantity (1/2)ρv^2 in Bernoulli's equation? — Pascal (Pa)
31. The effectiveness of a roof design in resisting wind pressure is influenced by: — Bernoulli's principle
32. The pressure difference between two points in a fluid flow is related to the change in velocity and height. This is the essence of: — Bernoulli's Principle
33. A 'Venturi meter' is a device used to measure the speed of a fluid. It works based on: — Bernoulli's principle
34. A hole is drilled in the side of a tank. The speed of efflux of the liquid from the hole is given by Torricelli's theorem, which is derived from: — Bernoulli's Principle
35. For a fluid flowing vertically upwards in a pipe, where the cross-sectional area decreases, which of the following statements is true according to Bernoulli's principle? — Pressure decreases and velocity increases.
36. A siphon tube works on the principle that: — Faster moving fluid exerts lower pressure.
37. Which of the following is a correct statement regarding Bernoulli's principle? — Sum of static pressure, dynamic pressure, and hydrostatic pressure is constant.
38. In Bernoulli's equation, P + (1/2)ρv^2 + ρgh = constant, the term '(1/2)ρv^2' represents: — Kinetic energy per unit volume (dynamic pressure)
39. The Pitot tube is used to measure the speed of a fluid by utilizing the difference between: — Static pressure and dynamic pressure
40. The total energy per unit volume of a fluid in motion, as described by Bernoulli's equation, is the sum of: — Static pressure, kinetic energy per unit volume, and potential energy per unit volume
41. A boat moving on water experiences a reduced pressure in the water just beneath it when the water is also moving. This is an example of: — Bernoulli's principle
42. The sprayers or atomizers work on the principle of: — Bernoulli's principle
43. A stream of water falling from a tap narrows as it falls. This is because: — Gravity accelerates the water, increasing its speed and decreasing its pressure.
44. In a Venturi meter, the constriction leads to a decrease in pressure because: — The fluid velocity increases.
45. Which of the following assumptions is crucial for Bernoulli's principle to be strictly applicable? — The fluid flow must be steady and irrotational.
46. Which of the following conditions must be met for Bernoulli's principle to apply accurately? — The fluid is incompressible and the flow is steady and irrotational.
47. Why does a shower curtain tend to move inward when the shower is on? — The high-speed water spray creates a low-pressure area inside the curtain.
48. The Magnus effect, observed in spinning projectiles or balls, is a direct consequence of: — Bernoulli's principle
49. In a horizontal pipe, if the radius decreases from R1 to R2 (where R2 < R1), the velocity of the fluid changes from v1 to v2 and the pressure changes from P1 to P2. According to Bernoulli's principle: — v2 > v1 and P2 < P1
50. A device that measures the speed of wind or a flowing fluid by measuring the difference between static and stagnation pressure is called a: — Pitot tube
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