fluid statics pressure measurement manometers u tube inclined tube - One Line Questions

1. A manometer filled with water is used to measure the gauge pressure of air. If the water level in the arm connected to the atmosphere is 10 cm higher than in the arm connected to the air, what is the gauge pressure of the air? — -10 cm of water (gauge)
2. Consider a U-tube manometer connected to a tank of water (density 1000 kg/m³). The manometric fluid is mercury (density 13600 kg/m³). If the mercury level in the tank side is 0.2 m higher than in the other side, what is the gauge pressure in the tank? — 26.7 kPa
3. What is the pressure at the bottom of a tank filled with water to a depth of 5 meters? (Assume atmospheric pressure is 101.3 kPa and density of water is 1000 kg/m³) — 151.3 kPa
4. A simple U-tube manometer filled with mercury is used to measure the gauge pressure of air. If the mercury level in the arm connected to the air is 50 mm above the level in the other arm, what is the gauge pressure of the air? — 50 mm of Hg (gauge)
5. Standard atmospheric pressure at sea level is approximately: — All of the above
6. A differential manometer measures: — Pressure difference between two points
7. The pressure measured by a simple U-tube manometer connected to a pressure source is: — Gauge pressure
8. The 'gage' in 'gauge pressure' refers to pressure measured relative to: — Standard atmospheric pressure
9. Gauge pressure is defined as the pressure relative to: — Atmospheric pressure
10. To minimize errors due to surface tension in a U-tube manometer, the diameter of the tubes should be: — As large as possible
11. What is the fundamental principle governing fluid statics? — Pascal's Law
12. The pressure variation in a static fluid is given by the hydrostatic equation: — dP/dz = -ρg
13. The pressure measured by a barometer is: — Absolute pressure
14. The pressure at a depth 'h' in a fluid of density 'ρ' is given by P = P₀ + ρgh, where P₀ is the pressure at the surface. This equation represents: — Absolute pressure
15. In an inclined tube manometer, if the angle of inclination is θ and the vertical height difference is h, the length along the tube moved by the liquid is: — h / sin θ
16. The sensitivity of a manometer is increased by using a manometric fluid with: — Lower density
17. When measuring a vacuum using a U-tube manometer, the liquid level in the arm connected to the vacuum source will be: — Higher than the other arm
18. If the atmospheric pressure decreases, the reading on a U-tube manometer measuring gauge pressure will: — Remain unchanged
19. If the angle of inclination of the tube in an inclined manometer is decreased, the sensitivity: — Increases
20. In an inclined tube manometer, the inclination of the tube: — Magnifies the vertical displacement of the liquid column
21. An inclined tube manometer is preferred over a U-tube manometer for measuring very small pressure differences because: — It amplifies the liquid displacement along the tube
22. Which of the following is a disadvantage of using mercury in a U-tube manometer? — It is toxic and poses environmental hazards
23. When measuring the pressure of a liquid using a manometer, the manometric fluid should ideally be: — More dense than the liquid being measured
24. A manometer is a device used for: — Measuring pressure
25. Surface tension effects in manometers are most significant when: — Using liquids with high surface tension
26. Which of the following fluids is commonly used in manometers for measuring low pressures due to its low density? — Water
27. For measuring high pressures, manometers are generally: — Less sensitive and impractical
28. What is the unit of pressure in the SI system? — Pascal (Pa)
29. In a U-tube manometer measuring gauge pressure, if the liquid in the manometer rises in the arm connected to the atmosphere, the gauge pressure is: — Positive
30. If the liquid in the manometer rises in the arm connected to the unknown pressure, the gauge pressure is: — Negative
31. Which type of manometer is suitable for measuring very small pressure differences? — Inclined tube manometer
32. If a U-tube manometer contains two immiscible liquids of different densities, the pressure difference is calculated by: — Sum of the pressure heads
33. The difference in liquid levels in the two arms of a U-tube manometer directly corresponds to: — The gauge pressure
34. When using a manometer to measure the pressure of a gas, it is assumed that: — The gas is static
35. The unit 'mm of Hg' used in manometry refers to: — The height of a mercury column exerting a specific pressure
36. The pressure exerted by a column of liquid is independent of: — The shape of the container
37. What is the pressure head of a fluid column? — The height of the fluid column
38. In a well-type manometer, the large cross-sectional area of the well compared to the tube ensures that: — The change in level in the well is negligible
39. For a given pressure difference, the horizontal distance moved by the liquid in an inclined tube manometer is proportional to: — The cotangent of the angle of inclination
40. In a differential U-tube manometer, the pressure difference between two points is indicated by: — The difference in liquid levels in the two arms
41. A U-tube manometer measures pressure by balancing the unknown pressure against: — The weight of the fluid column
42. What is the primary limitation of using manometers for pressure measurement? — They are not suitable for dynamic pressure measurements
43. What is the purpose of using a well-type manometer? — To measure very low pressures by magnifying the deflection
44. Which type of manometer uses a single vertical column of liquid? — Barometer
45. The zero error in a manometer can be caused by: — Incorrect alignment of the tube
46. Absolute pressure is equal to gauge pressure plus: — Atmospheric pressure
47. An inclined tube manometer is used to measure: — Very low pressures
48. In fluid statics, pressure at a point in a fluid is: — Equal in all directions
49. The pressure exerted by a vertical column of fluid of height 'h' and density 'ρ' is: — ρgh
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