Pressure due to a fluid column, Pascal's law and applications, effect of gravity on fluid pressure - One Line Questions

1. If a fluid is at rest, the pressure gradient is related to the gravitational force by: — ∇P = -ρg
2. A submarine at a depth of 100 meters experiences a pressure due to the water column. If the density of seawater is 1025 kg/m³ and g ≈ 10 m/s², the pressure due to water alone is approximately: — 1.025 MPa
3. At sea level, standard atmospheric pressure is approximately: — 101.3 kPa
4. A hydraulic jack uses two cylinders of different diameters. If the diameter of the larger cylinder is twice the diameter of the smaller cylinder, the force multiplication factor is: — 4
5. A hydraulic press has a small piston of area 10 cm² and a large piston of area 100 cm². If a force of 50 N is applied to the small piston, the force exerted by the large piston is: — 500 N
6. Which of the following is a consequence of gravity's effect on fluid pressure? — Pressure increases with depth
7. If the area of the larger piston in a hydraulic lift is A2 and the area of the smaller piston is A1, and forces F1 and F2 are applied, then F2/F1 is equal to: — A2/A1
8. Gauge pressure is the pressure relative to: — Atmospheric pressure
9. In a hydraulic brake system, the brake fluid transmits pressure from the brake pedal to the brake pads. This transmission follows: — Pascal's law
10. A U-tube manometer is used to measure: — Gauge pressure
11. Which of the following is a common application of Pascal's law? — Hydraulic lift
12. A hydraulic press operates on the principle of: — Pascal's Law
13. In a hydraulic lift, a small force applied to a small piston generates a large force on a large piston because of: — Pascal's law
14. A hydraulic press allows us to lift heavy objects using a smaller input force. This is an application of: — Pascal's Law
15. If you dive deeper into a lake, the pressure you experience will: — Increase
16. The pressure at a depth 'h' in a liquid of density 'ρ' is given by P = ρgh. If gravity 'g' were to increase, the pressure at depth 'h' would: — Increase
17. The effect of gravity on fluid pressure is that pressure: — Increases with depth
18. Pressure exerted by a fluid column is directly proportional to its: — Density and depth
19. The pressure at the same horizontal level in a connected body of a homogeneous liquid is: — The same, irrespective of the shape of the container
20. The pressure exerted by a fluid column of height 'h' and density 'ρ' in a gravitational field 'g' is: — Directly proportional to ρ, g and h
21. Atmospheric pressure is the pressure exerted by the weight of the: — Atmosphere
22. A barometer is a device used to measure: — Atmospheric pressure
23. Pascal's law is applicable to: — Enclosed fluids (liquids and gases)
24. Consider two identical containers filled with water to the same height. One is cylindrical, and the other is conical with the wider end at the top. The pressure at the bottom of both containers will be: — Equal
25. If the density of the fluid is doubled, while the height of the column and gravity remain the same, the pressure exerted by the fluid column will: — Double
26. A man stands on the ground. The pressure exerted by him on the ground depends on: — His weight and the area of his feet
27. Absolute pressure is the sum of gauge pressure and: — Atmospheric pressure
28. In a closed container filled with an incompressible fluid, if pressure is applied to one part, the pressure at all other parts will: — Increase by the same amount
29. A diver ascending from a deep sea dive must decompress slowly to avoid: — Formation of nitrogen bubbles in the blood due to reduced pressure
30. In a hydraulic system, if the input force is applied over a smaller area, the output force is achieved over a larger area. This is a mechanical advantage gained due to: — Pressure transmission according to Pascal's law
31. When gravity is considered, the pressure at a point in a fluid is: — Dependent on depth and density
32. If the acceleration due to gravity 'g' on Earth were zero, what would be the pressure at any depth in a fluid column? — Equal to atmospheric pressure
33. In a hydraulic system, work done is conserved (ignoring friction). If the force is multiplied by a factor of 'n', the distance over which the force is applied must be: — Divided by 'n'
34. The pressure at a point in a liquid is the same in all directions. This statement is a consequence of: — Pascal's law
35. Pascal's law states that a change in pressure applied to an enclosed fluid is transmitted: — Equally and undiminished to every portion of the fluid
36. If a container is open to the atmosphere and filled with a liquid, the absolute pressure at a depth 'h' is given by: — P_atm + ρgh
37. When a fluid is in equilibrium, the force exerted by the fluid on any surface is: — Perpendicular to the surface
38. What is the SI unit of pressure? — Pascal (Pa)
39. A siphon works based on the principle of: — Bernoulli's principle and atmospheric pressure
40. Which of the following statements about fluid pressure is correct? — Pressure is exerted equally in all directions at a point.
41. The formula for pressure exerted by a fluid column is P = ρgh, where ρ is the fluid density, g is the acceleration due to gravity, and h is the: — Height of the fluid column
42. If a container is filled with a liquid and accelerated horizontally, the pressure at a given depth: — Increases in the direction of acceleration
43. The pressure at the bottom of a container filled with a liquid depends on the liquid's: — Density and height
44. A large tank is filled with water. A tap is opened at a depth 'h' from the surface. The speed of efflux of water depends on: — The height 'h' (Torricelli's theorem)
45. The pressure at the bottom of a container filled with a liquid is independent of: — The shape of the container
46. The pressure at the deepest part of the ocean is significantly higher than atmospheric pressure due to: — The density and immense height of the water column
47. The pressure at the bottom of a dam is greatest at the: — Base of the dam
48. The reason why a liquid surface under gravity is always horizontal is due to: — Pressure distribution
49. The pressure at the surface of a liquid is usually considered to be: — Equal to atmospheric pressure
50. Consider a fluid at rest. The pressure difference between two points in the fluid, separated by a vertical distance 'h', is given by: — ρgh
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