SSC JE Exam - fluid statics pressure measurement manometers u tube inclined tube Online Test (MCQ Quiz)

1. What is the fundamental principle governing fluid statics?

A) Bernoulli's Principle B) Archimedes' Principle C) Pascal's Law D) Newton's Third Law

2. In fluid statics, pressure at a point in a fluid is:

A) Zero B) Equal in all directions C) Dependent on depth only D) Dependent on temperature only

3. The pressure variation in a static fluid is given by the hydrostatic equation:

A) dP/dz = ρg B) dP/dz = -ρg C) dP/dz = ρ/g D) dP/dz = -ρ/g

4. What is the unit of pressure in the SI system?

A) Pascal (Pa) B) Joule (J) C) Watt (W) D) Newton (N)

5. A manometer is a device used for:

A) Measuring flow rate B) Measuring pressure C) Measuring temperature D) Measuring viscosity

6. Which type of manometer uses a single vertical column of liquid?

A) U-tube manometer B) Inclined tube manometer C) Barometer D) Well-type manometer

7. A U-tube manometer measures pressure by balancing the unknown pressure against:

A) The weight of the fluid column B) The viscosity of the fluid C) The surface tension of the fluid D) The kinetic energy of the fluid

8. 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:

A) Positive B) Negative C) Zero D) Indeterminate

9. If the liquid in the manometer rises in the arm connected to the unknown pressure, the gauge pressure is:

A) Positive B) Negative C) Zero D) Indeterminate

10. The difference in liquid levels in the two arms of a U-tube manometer directly corresponds to:

A) The absolute pressure B) The gauge pressure C) The atmospheric pressure D) The vapor pressure

11. The sensitivity of a manometer is increased by using a manometric fluid with:

A) Higher density B) Lower density C) Higher viscosity D) Lower viscosity

12. An inclined tube manometer is used to measure:

A) Very high pressures B) Very low pressures C) Absolute pressures D) Vacuum pressures

13. In an inclined tube manometer, the inclination of the tube:

A) Increases the pressure reading B) Decreases the pressure reading C) Magnifies the vertical displacement of the liquid column D) Reduces the sensitivity

14. For a given pressure difference, the horizontal distance moved by the liquid in an inclined tube manometer is proportional to:

A) The sine of the angle of inclination B) The cosine of the angle of inclination C) The tangent of the angle of inclination D) The cotangent of the angle of inclination

15. If the angle of inclination of the tube in an inclined manometer is decreased, the sensitivity:

A) Increases B) Decreases C) Remains the same D) Becomes zero

16. 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?

A) 50 mm of Hg (gauge) B) -50 mm of Hg (gauge) C) 100 mm of Hg (gauge) D) 0 mm of Hg (gauge)

17. 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?

A) 2.67 kPa B) 26.7 kPa C) 267 kPa D) 0.267 kPa

18. What is the purpose of using a well-type manometer?

A) To measure very high pressures B) To measure very low pressures by magnifying the deflection C) To measure differential pressures D) To measure absolute pressures

19. In a well-type manometer, the large cross-sectional area of the well compared to the tube ensures that:

A) The pressure reading is always zero B) The change in level in the well is negligible C) The manometric fluid expands significantly D) The surface tension effects are amplified

20. The pressure measured by a barometer is:

A) Gauge pressure B) Absolute pressure C) Differential pressure D) Vacuum pressure

21. Standard atmospheric pressure at sea level is approximately:

A) 760 mm of Hg B) 10.3 m of water C) 101.325 kPa D) All of the above

22. If a U-tube manometer contains two immiscible liquids of different densities, the pressure difference is calculated by:

A) Sum of the pressure heads B) Difference of the pressure heads C) Product of the pressure heads D) Ratio of the pressure heads

23. What is the pressure head of a fluid column?

A) The pressure exerted by the fluid column B) The height of the fluid column C) The density of the fluid column D) The velocity of the fluid column

24. The unit 'mm of Hg' used in manometry refers to:

A) The height of a mercury column exerting a specific pressure B) The mass of mercury C) The volume of mercury D) The temperature of mercury

25. When measuring a vacuum using a U-tube manometer, the liquid level in the arm connected to the vacuum source will be:

A) Higher than the other arm B) Lower than the other arm C) Equal to the other arm D) Zero

26. Gauge pressure is defined as the pressure relative to:

A) Absolute zero pressure B) Atmospheric pressure C) Vapor pressure D) Hydrostatic pressure

27. Absolute pressure is equal to gauge pressure plus:

A) Vacuum pressure B) Atmospheric pressure C) Hydrostatic pressure D) Surface tension

28. 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:

A) Gauge pressure B) Absolute pressure C) Differential pressure D) Vacuum pressure

29. Surface tension effects in manometers are most significant when:

A) Measuring high pressures B) Using liquids with high surface tension C) Using wide tubes D) Measuring large pressure differences

30. To minimize errors due to surface tension in a U-tube manometer, the diameter of the tubes should be:

A) As small as possible B) As large as possible C) Constant D) Varying

31. Which of the following fluids is commonly used in manometers for measuring low pressures due to its low density?

A) Mercury B) Water C) Kerosene D) Alcohol

32. For measuring high pressures, manometers are generally:

A) More sensitive and practical B) Less sensitive and impractical C) Equally sensitive and practical D) Not suitable

33. In a differential U-tube manometer, the pressure difference between two points is indicated by:

A) The total height of the liquid column B) The difference in liquid levels in the two arms C) The density of the manometric fluid D) The viscosity of the fluid being measured

34. When using a manometer to measure the pressure of a gas, it is assumed that:

A) The gas is highly viscous B) The gas is compressible C) The gas is static D) The gas is flowing at high velocity

35. The 'gage' in 'gauge pressure' refers to pressure measured relative to:

A) Absolute vacuum B) Standard atmospheric pressure C) Boiling point of water D) Freezing point of water

36. Which type of manometer is suitable for measuring very small pressure differences?

A) Simple U-tube manometer B) Inclined tube manometer C) Well-type manometer D) Barometer

37. The pressure exerted by a vertical column of fluid of height 'h' and density 'ρ' is:

A) ρgh B) ρ/gh C) ρg/h D) gh/ρ

38. If the atmospheric pressure decreases, the reading on a U-tube manometer measuring gauge pressure will:

A) Increase B) Decrease C) Remain unchanged D) Become negative

39. What is the primary limitation of using manometers for pressure measurement?

A) They can only measure gauge pressure B) They are not suitable for dynamic pressure measurements C) They require a high flow rate D) They are only accurate at very high temperatures

40. 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:

A) h sin θ B) h cos θ C) h / sin θ D) h / cos θ

41. 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?

A) 10 cm of water (gauge) B) -10 cm of water (gauge) C) 20 cm of water (gauge) D) 0 cm of water (gauge)

42. The pressure exerted by a column of liquid is independent of:

A) The height of the column B) The density of the liquid C) The acceleration due to gravity D) The shape of the container

43. Which of the following is a disadvantage of using mercury in a U-tube manometer?

A) Its low density leads to large deflections B) It is toxic and poses environmental hazards C) It has low surface tension D) It is expensive

44. When measuring the pressure of a liquid using a manometer, the manometric fluid should ideally be:

A) Less dense than the liquid being measured B) More dense than the liquid being measured C) Of the same density as the liquid being measured D) Non-viscous

45. A differential manometer measures:

A) Absolute pressure B) Gauge pressure C) Atmospheric pressure D) Pressure difference between two points

46. The zero error in a manometer can be caused by:

A) Using a fluid with high density B) Incorrect alignment of the tube C) High atmospheric pressure D) High temperature

47. 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)

A) 50 kPa B) 101.3 kPa C) 151.3 kPa D) 49.05 kPa

48. An inclined tube manometer is preferred over a U-tube manometer for measuring very small pressure differences because:

A) It uses a denser fluid B) It amplifies the liquid displacement along the tube C) It is less sensitive to temperature changes D) It can measure higher pressures

49. The pressure measured by a simple U-tube manometer connected to a pressure source is:

A) Absolute pressure B) Gauge pressure C) Vacuum pressure D) Differential pressure

fluid statics pressure measurement manometers u tube inclined tube - Online Test

Test Results