{"id":12467,"date":"2025-09-16T07:29:17","date_gmt":"2025-09-16T06:29:17","guid":{"rendered":"https:\/\/mcqsadda.com\/?p=12467"},"modified":"2025-10-22T09:38:21","modified_gmt":"2025-10-22T08:38:21","slug":"pressure-top-100-mcqs-with-answer-and-explanation","status":"publish","type":"post","link":"https:\/\/mcqsadda.com\/index.php\/2025\/09\/16\/pressure-top-100-mcqs-with-answer-and-explanation\/","title":{"rendered":"Pressure Top 100 MCQs With Answer and Explanation"},"content":{"rendered":"\n

1. What is the SI unit of pressure?<\/mark><\/strong>
a) Pascal
b) Newton
c) Joule
d) Watt
Answer:<\/strong> a) Pascal
Explanation:<\/strong> Pressure is defined as force per unit area. The SI unit is Pascal (Pa), where 1 Pa = 1 N\/m\u00b2.<\/p>\n\n\n\n

2. Pressure is a __________ quantity.<\/mark><\/strong>
a) Scalar
b) Vector
c) Both scalar and vector
d) None
Answer:<\/strong> a) Scalar
Explanation:<\/strong> Pressure acts equally in all directions and has magnitude only, so it is a scalar quantity.<\/p>\n\n\n\n

3. The atmospheric pressure at sea level is approximately:<\/mark><\/strong>
a) 1 atm
b) 1 Pa
c) 1 N
d) 1 W
Answer:<\/strong> a) 1 atm
Explanation:<\/strong> Atmospheric pressure at sea level is about 1 atmosphere (atm) = 101,325 Pa.<\/p>\n\n\n\n

4. What is the formula for pressure?<\/mark><\/strong>
a) Pressure = Force \u00d7 Area
b) Pressure = Force \/ Area
c) Pressure = Area \/ Force
d) Pressure = Force + Area
Answer:<\/strong> b) Pressure = Force \/ Area
Explanation:<\/strong> Pressure is defined as the force applied perpendicular to the surface divided by the area of that surface.<\/p>\n\n\n\n

5. The pressure at a depth h in a liquid of density \u03c1 under gravity g is given by:<\/mark><\/strong>
a) P = \u03c1gh
b) P = mg
c) P = \u03c1g\/h
d) P = h\/\u03c1g
Answer:<\/strong> a) P = \u03c1gh
Explanation:<\/strong> Pressure due to a liquid column is the product of density, gravity, and height of the liquid column.<\/p>\n\n\n\n

6. Which device is used to measure atmospheric pressure?<\/mark><\/strong>
a) Barometer
b) Manometer
c) Voltmeter
d) Ammeter
Answer:<\/strong> a) Barometer
Explanation:<\/strong> A barometer measures atmospheric pressure.<\/p>\n\n\n\n

7. Pressure in fluids acts:<\/mark><\/strong>
a) Only downwards
b) In all directions equally
c) Only upwards
d) Horizontally
Answer:<\/strong> b) In all directions equally
Explanation:<\/strong> According to Pascal\u2019s law, pressure applied to a confined fluid is transmitted equally in all directions.<\/p>\n\n\n\n

8. The unit atmosphere (atm) is equal to:<\/mark><\/strong>
a) 101,325 Pa
b) 100 Pa
c) 1 Pa
d) 10 Pa
Answer:<\/strong> a) 101,325 Pa
Explanation:<\/strong> 1 atm = 101,325 Pascals.<\/p>\n\n\n\n

9. Pressure applied on a liquid is transmitted:<\/mark><\/strong>
a) Unequally
b) Only upwards
c) Equally in all directions
d) Only downwards
Answer:<\/strong> c) Equally in all directions
Explanation:<\/strong> Pascal\u2019s principle states that pressure applied on a confined fluid transmits equally.<\/p>\n\n\n\n

10. The pressure of a gas in a container depends on:<\/mark><\/strong>
a) Temperature only
b) Volume only
c) Both temperature and volume
d) Neither temperature nor volume
Answer:<\/strong> c) Both temperature and volume
Explanation:<\/strong> According to gas laws, pressure depends on both temperature and volume.<\/p>\n\n\n\n

11. Which law relates pressure and volume of a gas at constant temperature?<\/mark><\/strong>
a) Boyle\u2019s law
b) Charles\u2019s law
c) Newton\u2019s law
d) Hooke\u2019s law
Answer:<\/strong> a) Boyle\u2019s law
Explanation:<\/strong> Boyle\u2019s law states that pressure \u00d7 volume = constant at constant temperature.<\/p>\n\n\n\n

12. If the area on which a force acts is doubled, the pressure:<\/mark><\/strong>
a) Doubles
b) Halves
c) Remains same
d) Quadruples
Answer:<\/strong> b) Halves
Explanation:<\/strong> Pressure = Force\/Area, so if area increases, pressure decreases.<\/p>\n\n\n\n

13. The pressure exerted by a gas is due to:<\/mark><\/strong>
a) The collisions of molecules with the container walls
b) The weight of the gas
c) The temperature of the gas only
d) The color of the g<\/mark>as
Answer:<\/strong> a) The collisions of molecules with the container walls
Explanation:<\/strong> Gas pressure is caused by molecules colliding with container walls.<\/p>\n\n\n\n

14. The unit mmHg used to measure pressure stands for:<\/mark><\/strong>
a) Millimeter of mercury
b) Millimeter of magnesium
c) Millimeter of molybdenum
d) Millimeter of manganese
Answer:<\/strong> a) Millimeter of mercury
Explanation:<\/strong> mmHg is a unit of pressure, based on mercury column height.<\/p>\n\n\n\n

15. The principle used in hydraulic lift is:<\/mark><\/strong>
a) Bernoulli\u2019s principle
b) Pascal\u2019s principle
c) Archimedes\u2019 principle
d) Newton\u2019s second law
Answer:<\/strong> b) Pascal\u2019s principle
Explanation:<\/strong> Hydraulic lift works on Pascal\u2019s principle of pressure transmission.<\/p>\n\n\n\n

16. The pressure at the bottom of a swimming pool depends on:<\/mark><\/strong>
a) The depth of the water
b) The area of the bottom
c) The volume of water
d) The shape of the pool
Answer:<\/strong> a) The depth of the water
Explanation:<\/strong> Pressure depends on the height (depth) of the liquid column.<\/p>\n\n\n\n

17. Atmospheric pressure decreases with:<\/mark><\/strong>
a) Increase in altitude
b) Decrease in altitude
c) No change with altitude
d) Increase in temperature
Answer:<\/strong> a) Increase in altitude
Explanation:<\/strong> Atmospheric pressure decreases as altitude increases due to less air above.<\/p>\n\n\n\n

18. The pressure exerted by a column of liquid is independent of:<\/mark><\/strong>
a) Height of the liquid column
b) Density of the liquid
c) Area of the base of the container
d) Gravitational acceleration
Answer:<\/strong> c) Area of the base of the container
Explanation:<\/strong> Pressure depends on height, density, gravity, but not on base area.<\/p>\n\n\n\n

19. The device used to measure pressure of gases in a closed container is called:<\/mark><\/strong>
a) Manometer
b) Barometer
c) Hydrometer
d) Voltmeter
Answer:<\/strong> a) Manometer
Explanation:<\/strong> A manometer measures pressure of gases in a container.<\/p>\n\n\n\n

20. What happens to pressure if the force is tripled and area is doubled?<\/mark><\/strong>
a) Pressure triples
b) Pressure halves
c) Pressure becomes 1.5 times
d) Pressure remains same
Answer:<\/strong> c) Pressure becomes 1.5 times
Explanation:<\/strong> Pressure = Force\/Area; so (3F)\/(2A) = 1.5 \u00d7 (F\/A).<\/p>\n\n\n\n

21. The pressure inside a liquid at rest is:<\/mark><\/strong>
a) Equal at all points at the same depth
b) Varies with horizontal distance
c) Zero at the bottom
d) Highest at the top
Answer:<\/strong> a) Equal at all points at the same depth
Explanation:<\/strong> In a fluid at rest, pressure at the same depth is the same everywhere, irrespective of the shape of the container.<\/p>\n\n\n\n

22. Which pressure unit is commonly used in tire inflation?<\/mark><\/strong>
a) Pascal
b) Bar
c) Newton
d) Atmosphere
Answer:<\/strong> b) Bar
Explanation:<\/strong> Tire pressure is often measured in bars; 1 bar = 100,000 Pa approx.<\/p>\n\n\n\n

23. When you go deep inside a well, the pressure:<\/mark><\/strong>
a) Increases
b) Decreases
c) Remains constant
d) First increases then decreases
Answer:<\/strong> a) Increases
Explanation:<\/strong> Pressure increases with depth in a liquid because of the increasing weight of the fluid above.<\/p>\n\n\n\n

24. The absolute pressure at a depth h in a liquid is:<\/mark><\/strong>
a) \u03c1gh
b) Atmospheric pressure – \u03c1gh
c) Atmospheric pressure + \u03c1gh
d) Atmospheric pressure \/ \u03c1gh
Answer:<\/strong> c) Atmospheric pressure + \u03c1gh
Explanation:<\/strong> Total pressure includes atmospheric pressure plus pressure due to the liquid column.<\/p>\n\n\n\n

25. Which gas law relates pressure and temperature at constant volume?<\/mark><\/strong>
a) Boyle\u2019s law
b) Charles\u2019s law
c) Gay-Lussac\u2019s law
d) Avogadro\u2019s law
Answer:<\/strong> c) Gay-Lussac\u2019s law
Explanation:<\/strong> At constant volume, pressure is directly proportional to temperature.<\/p>\n\n\n\n

26. Which of the following liquids exerts the greatest pressure at the same depth?<\/mark><\/strong>
a) Water
b) Mercury
c) Alcohol
d) Oil
Answer:<\/strong> b) Mercury
Explanation:<\/strong> Mercury has the highest density among these liquids, so pressure = \u03c1gh is greatest.<\/p>\n\n\n\n

27. The manometer reading is 760 mmHg. This means the gas pressure is:<\/mark><\/strong>
a) Equal to atmospheric pressure
b) Greater than atmospheric pressure
c) Less than atmospheric pressure
d) Zero pressure
Answer:<\/strong> a) Equal to atmospheric pressure
Explanation:<\/strong> 760 mmHg equals atmospheric pressure at sea level.<\/p>\n\n\n\n

28. Which principle explains why a ship floats?<\/mark><\/strong>
a) Pascal\u2019s principle
b) Archimedes\u2019 principle
c) Bernoulli\u2019s principle
d) Newton\u2019s third law
Answer:<\/strong> b) Archimedes\u2019 principle
Explanation:<\/strong> A floating object experiences an upward buoyant force equal to the weight of displaced fluid.<\/p>\n\n\n\n

29. If the pressure on a liquid surface increases, what happens to the level of liquid in a connected tube?<\/mark><\/strong>
a) Increases
b) Decreases
c) Remains same
d) First increases then decreases
Answer:<\/strong> b) Decreases
Explanation:<\/strong> Increasing pressure on the liquid surface pushes liquid down in the connected tube.<\/p>\n\n\n\n

30. The force acting on 1 cm\u00b2 area when 1 Pascal pressure is applied is:<\/mark><\/strong>
a) 1 N
b) 0.1 N
c) 0.01 N
d) 0.001 N
Answer:<\/strong> d) 0.001 N
Explanation:<\/strong> 1 Pa = 1 N\/m\u00b2. For 1 cm\u00b2 = 1\u00d710\u207b\u2074 m\u00b2, Force = Pressure \u00d7 Area = 1 \u00d7 10\u207b\u2074 N = 0.0001 N.<\/p>\n\n\n\n

31. The pressure exerted by blood on artery walls is measured in:<\/mark><\/strong>
a) Pascal
b) mmHg
c) Newton
d) Watt
Answer:<\/strong> b) mmHg
Explanation:<\/strong> Blood pressure is measured in millimeters of mercury (mmHg).<\/p>\n\n\n\n

32. Which liquid is used in a barometer?<\/mark><\/strong>
a) Water
b) Mercury
c) Alcohol
d) Oil
Answer:<\/strong> b) Mercury
Explanation:<\/strong> Mercury is used because of its high density and low vapor pressure.<\/p>\n\n\n\n

33. Pressure difference in a manometer is given by:<\/mark><\/strong>
a) \u03c1gh
b) P1 – P2
c) Both a and b
d) None of the above
Answer:<\/strong> c) Both a and b
Explanation:<\/strong> Pressure difference can be expressed as difference in heights times density times gravity or directly as difference of pressures.<\/p>\n\n\n\n

34. In which case is pressure maximum?<\/mark><\/strong>
a) On a sharp knife edge
b) On a flat surface
c) On a broad plate
d) On a cushion
Answer:<\/strong> a) On a sharp knife edge
Explanation:<\/strong> Smaller area increases pressure (Pressure = Force\/Area).<\/p>\n\n\n\n

35. What is the pressure in Pascals exerted by a force of 200 N acting on an area of 0.5 m\u00b2?<\/mark><\/strong>
a) 400 Pa
b) 100 Pa
c) 0.4 Pa
d) 0.1 Pa
Answer:<\/strong> a) 400 Pa
Explanation:<\/strong> Pressure = Force \/ Area = 200 \/ 0.5 = 400 Pa.<\/p>\n\n\n\n

36. If the depth of a liquid is doubled, the pressure:<\/mark><\/strong>
a) Doubles
b) Halves
c) Quadruples
d) Remains same
Answer:<\/strong> a) Doubles
Explanation:<\/strong> Pressure is directly proportional to depth (P = \u03c1gh).<\/p>\n\n\n\n

37. The pressure exerted by a liquid depends on:<\/mark><\/strong>
a) Depth of the liquid
b) Density of the liquid
c) Acceleration due to gravity
d) All of the above
Answer:<\/strong> d) All of the above
Explanation:<\/strong> Pressure = \u03c1gh, where \u03c1 is density and g is acceleration due to gravity.<\/p>\n\n\n\n

38. Which of these liquids will exert the least pressure at the same depth?<\/mark><\/strong>
a) Water
b) Mercury
c) Oil
d) Alcohol
Answer:<\/strong> d) Alcohol
Explanation:<\/strong> Alcohol has the lowest density among these, resulting in least pressure.<\/p>\n\n\n\n

39. Pressure exerted by a gas in a container is due to:<\/mark><\/strong>
a) Molecular collisions with container walls
b) Weight of the gas molecules
c) Temperature only
d) Volume only
Answer:<\/strong> a) Molecular collisions with container walls
Explanation:<\/strong> Gas pressure is caused by constant collisions of molecules with container walls.<\/p>\n\n\n\n

40. The hydrostatic paradox states that:<\/mark><\/strong>
a) Pressure depends only on depth, not shape
b) Pressure depends on shape only
c) Pressure depends on volume
d) None of the above
Answer:<\/strong> a) Pressure depends only on depth, not shape
Explanation:<\/strong> Hydrostatic paradox says pressure at a given depth is same regardless of container shape.<\/p>\n\n\n\n

41. What device measures blood pressure?<\/mark><\/strong>
a) Barometer
b) Sphygmomanometer
c) Manometer
d) Hydrometer
Answer:<\/strong> b) Sphygmomanometer
Explanation:<\/strong> Used to measure blood pressure, typically in mmHg.<\/p>\n\n\n\n

42. If a force is applied on a small area, pressure is:<\/mark><\/strong>
a) High
b) Low
c) Zero
d) Same
Answer:<\/strong> a) High
Explanation:<\/strong> Pressure increases when the area is small (Pressure = Force\/Area).<\/p>\n\n\n\n

43. Pascal\u2019s law is applied in:<\/mark><\/strong>
a) Hydraulic brakes
b) Electric circuits
c) Optics
d) Thermodynamics
Answer:<\/strong> a) Hydraulic brakes
Explanation:<\/strong> Hydraulic systems transmit pressure equally in all directions.<\/p>\n\n\n\n

44. Pressure at the bottom of a dam depends on:<\/mark><\/strong>
a) Depth of water
b) Shape of dam
c) Width of dam
d) Length of dam
Answer:<\/strong> a) Depth of water
Explanation:<\/strong> Pressure depends on water depth and density.<\/p>\n\n\n\n

45. If atmospheric pressure is 1 atm, what is it in Pascal?<\/mark><\/strong>
a) 101,325 Pa
b) 100 Pa
c) 1 Pa
d) 10,000 Pa
Answer:<\/strong> a) 101,325 Pa
Explanation:<\/strong> 1 atm = 101,325 Pa.<\/p>\n\n\n\n

46. What is gauge pressure?<\/mark><\/strong>
a) Absolute pressure minus atmospheric pressure
b) Atmospheric pressure minus absolute pressure
c) Absolute pressure plus atmospheric pressure
d) Pressure in vacuum
Answer:<\/strong> a) Absolute pressure minus atmospheric pressure
Explanation:<\/strong> Gauge pressure excludes atmospheric pressure.<\/p>\n\n\n\n

47. The pressure at the bottom of a liquid column is 2000 Pa. If the height is 0.5 m, what is the density? (g=10 m\/s\u00b2)<\/mark><\/strong>
a) 400 kg\/m\u00b3
b) 2000 kg\/m\u00b3
c) 100 kg\/m\u00b3
d) 500 kg\/m\u00b3
Answer:<\/strong> a) 400 kg\/m\u00b3
Explanation:<\/strong> P = \u03c1gh \u2192 2000 = \u03c1 \u00d7 10 \u00d7 0.5 \u2192 \u03c1 = 2000\/5 = 400 kg\/m\u00b3.<\/p>\n\n\n\n

48. A fluid that cannot be compressed is called:<\/mark><\/strong>
a) Gas
b) Vapor
c) Liquid
d) Plasma
Answer:<\/strong> c) Liquid
Explanation:<\/strong> Liquids are practically incompressible compared to gases.<\/p>\n\n\n\n

49. Pressure in a fluid at rest is transmitted:<\/mark><\/strong>
a) Unequally
b) Equally in all directions
c) Only downward
d) Only upward
Answer:<\/strong> b) Equally in all directions
Explanation:<\/strong> According to Pascal\u2019s principle, pressure is transmitted equally.<\/p>\n\n\n\n

50. The pressure exerted by a gas increases with:<\/mark><\/strong>
a) Decreasing temperature
b) Increasing temperature
c) Increasing volume
d) Decreasing volume
Answer:<\/strong> b) Increasing temperature
Explanation:<\/strong> For constant volume, pressure increases with temperature (Gay-Lussac\u2019s law).<\/p>\n\n\n\n

51. A hydraulic lift works on:<\/mark><\/strong>
a) Boyle\u2019s law
b) Pascal\u2019s law
c) Bernoulli\u2019s principle
d) Archimedes\u2019 principle
Answer:<\/strong> b) Pascal\u2019s law
Explanation:<\/strong> Hydraulic lift transmits pressure equally in all directions.<\/p>\n\n\n\n

52. The relation between pressure and force is:<\/mark><\/strong>
a) Pressure = Force \u00d7 Area
b) Pressure = Force \/ Area
c) Pressure = Area \/ Force
d) Pressure = Force + Area
Answer:<\/strong> b) Pressure = Force \/ Area
Explanation:<\/strong> Pressure is force divided by area.<\/p>\n\n\n\n

53. Which of the following is true about atmospheric pressure?<\/mark><\/strong>
a) It decreases with altitude
b) It increases with altitude
c) It remains constant with altitude
d) It increases with temperature only
Answer:<\/strong> a) It decreases with altitude
Explanation:<\/strong> Atmospheric pressure decreases as altitude increases.<\/p>\n\n\n\n

54. What happens to pressure when force is kept constant but area is reduced?<\/mark><\/strong>
a) Pressure increases
b) Pressure decreases
c) Pressure remains constant
d) Pressure becomes zero
Answer:<\/strong> a) Pressure increases
Explanation:<\/strong> Pressure is inversely proportional to area.<\/p>\n\n\n\n

55. Pressure due to liquid column is independent of:<\/mark><\/strong>
a) Depth
b) Density
c) Shape of container
d) Gravity
Answer:<\/strong> c) Shape of container
Explanation:<\/strong> Pressure depends on depth, density, gravity, but not on container shape.<\/p>\n\n\n\n

56. The pressure at the surface of the Earth due to the atmosphere is:<\/mark><\/strong>
a) 1 atm
b) 0 atm
c) 10 atm
d) 100 atm
Answer:<\/strong> a) 1 atm
Explanation:<\/strong> Atmospheric pressure at sea level is 1 atmosphere.<\/p>\n\n\n\n

57. Pressure inside a liquid at rest depends on:<\/mark><\/strong>
a) Speed of liquid
b) Depth
c) Color of liquid
d) Shape of container
Answer:<\/strong> b) Depth
Explanation:<\/strong> Pressure in a static liquid depends only on depth.<\/p>\n\n\n\n

58. What happens to the pressure inside a gas if the volume is decreased at constant temperature?<\/mark><\/strong>
a) Pressure increases
b) Pressure decreases
c) Pressure remains constant
d) Pressure first increases then decreases
Answer:<\/strong> a) Pressure increases
Explanation:<\/strong> According to Boyle\u2019s law, pressure and volume are inversely proportional.<\/p>\n\n\n\n

59. Which principle explains the working of a hydraulic press?<\/mark><\/strong>
a) Pascal\u2019s principle
b) Archimedes\u2019 principle
c) Newton\u2019s second law
d) Bernoulli\u2019s principle
Answer:<\/strong> a) Pascal\u2019s principle
Explanation:<\/strong> Pressure applied at one point is transmitted equally.<\/p>\n\n\n\n

60. The force exerted by atmospheric pressure on 1 m\u00b2 at sea level is approximately:<\/mark><\/strong>
a) 10\u2075 N
b) 10\u00b2 N
c) 10\u00b3 N
d) 10\u2074 N
Answer:<\/strong> a) 10\u2075 N
Explanation:<\/strong> Atmospheric pressure ~10\u2075 Pa; Force = Pressure \u00d7 Area = 10\u2075 N.<\/p>\n\n\n\n

61. The pressure inside a closed container filled with gas is due to:<\/mark><\/strong>
a) Weight of gas
b) Molecules hitting the container walls
c) Temperature alone
d) Volume alone
Answer:<\/strong> b) Molecules hitting the container walls
Explanation:<\/strong> Gas pressure results from molecular collisions.<\/p>\n\n\n\n

62. The pressure exerted by a solid object is:<\/mark><\/strong>
a) Force divided by volume
b) Force multiplied by area
c) Force divided by area
d) Force multiplied by volume
Answer:<\/strong> c) Force divided by area
Explanation:<\/strong> Pressure = Force \/ Area.<\/p>\n\n\n\n

63. Pressure exerted by liquid depends on:<\/mark><\/strong>
a) Height of liquid column
b) Density of liquid
c) Gravity
d) All of these
Answer:<\/strong> d) All of these
Explanation:<\/strong> P = \u03c1gh includes all three factors.<\/p>\n\n\n\n

64. The unit of pressure used in medicine is:<\/mark><\/strong>
a) Pascal
b) mmHg
c) Watt
d) Newton
Answer:<\/strong> b) mmHg
Explanation:<\/strong> Blood pressure is measured in mmHg.<\/p>\n\n\n\n

65. In gases, pressure is caused by:<\/mark><\/strong>
a) Electric forces
b) Magnetic forces
c) Molecular collisions
d) Gravitational forces
Answer:<\/strong> c) Molecular collisions
Explanation:<\/strong> Pressure arises due to collisions of gas molecules with walls.<\/p>\n\n\n\n

66. The pressure at the bottom of a container filled with liquid depends on:<\/mark><\/strong>
a) Volume of liquid
b) Shape of container
c) Height of liquid column
d) Surface area of liquid
Answer:<\/strong> c) Height of liquid column
Explanation:<\/strong> Pressure depends on liquid column height.<\/p>\n\n\n\n

67. Hydraulic brakes work on the principle of:<\/mark><\/strong>
a) Bernoulli\u2019s principle
b) Pascal\u2019s principle
c) Archimedes\u2019 principle
d) Newton\u2019s law
Answer:<\/strong> b) Pascal\u2019s principle
Explanation:<\/strong> Pressure applied at one point is transmitted equally.<\/p>\n\n\n\n

68. The pressure exerted on the ground by a person is greater when:<\/mark><\/strong>
a) Standing on both feet
b) Standing on one foot
c) Sitting
d) Lying down
Answer:<\/strong> b) Standing on one foot
Explanation:<\/strong> Area decreases, so pressure increases.<\/p>\n\n\n\n

69. The pressure of the atmosphere is measured using:<\/mark><\/strong>
a) Manometer
b) Barometer
c) Thermometer
d) Hydrometer
Answer:<\/strong> b) Barometer
Explanation:<\/strong> Barometer measures atmospheric pressure.<\/p>\n\n\n\n

70. At a given depth in a fluid, the pressure is:<\/mark><\/strong>
a) Independent of density
b) Independent of gravity
c) Independent of shape of container
d) Dependent on shape of container
Answer:<\/strong> c) Independent of shape of container
Explanation:<\/strong> Hydrostatic pressure depends on depth and density only.<\/p>\n\n\n\n

71. Pressure exerted by a liquid is maximum at:<\/mark><\/strong>
a) Surface
b) Bottom
c) Midway
d) Depends on shape
Answer:<\/strong> b) Bottom
Explanation:<\/strong> Pressure increases with depth.<\/p>\n\n\n\n

72. Which of the following increases the pressure exerted on a surface?<\/mark><\/strong>
a) Decreasing force
b) Increasing area
c) Decreasing area
d) None of these
Answer:<\/strong> c) Decreasing area
Explanation:<\/strong> Pressure = Force\/Area, so smaller area increases pressure.<\/p>\n\n\n\n

73. Which of the following is not a unit of pressure?<\/mark><\/strong>
a) Pascal
b) Atmosphere
c) Newton
d) Bar
Answer:<\/strong> c) Newton
Explanation:<\/strong> Newton is a unit of force, not pressure.<\/p>\n\n\n\n

74. Pressure is __________ in nature.<\/mark><\/strong>
a) Vector
b) Scalar
c) Tensor
d) None
Answer:<\/strong> b) Scalar
Explanation:<\/strong> Pressure has magnitude only.<\/p>\n\n\n\n

75. What happens to the pressure in a liquid if density doubles but depth remains constant?<\/mark><\/strong>
a) Pressure doubles
b) Pressure halves
c) Pressure remains same
d) Pressure becomes zero
Answer:<\/strong> a) Pressure doubles
Explanation:<\/strong> P = \u03c1gh, so if \u03c1 doubles, pressure doubles.<\/p>\n\n\n\n

76. The pressure exerted by blood on artery walls is called:<\/mark><\/strong>
a) Systolic pressure
b) Diastolic pressure
c) Both
d) None
Answer:<\/strong> c) Both
Explanation:<\/strong> Blood pressure includes both systolic and diastolic pressures.<\/p>\n\n\n\n

77. If the atmospheric pressure is 1 atm and gauge pressure is 2 atm, the absolute pressure is:<\/mark><\/strong>
a) 3 atm
b) 1 atm
c) 2 atm
d) 0 atm
Answer:<\/strong> a) 3 atm
Explanation:<\/strong> Absolute pressure = atmospheric + gauge pressure.<\/p>\n\n\n\n

78. The hydrostatic pressure at a depth of 10 m in water is approximately: (Take g=10 m\/s\u00b2, \u03c1_water=1000 kg\/m\u00b3)<\/mark><\/strong>
a) 10,0000 Pa
b) 1,000 Pa
c) 100 Pa
d) 10,000 Pa
Answer:<\/strong> a) 10,000 Pa
Explanation:<\/strong> P = \u03c1gh = 1000 \u00d7 10 \u00d7 10 = 100,000 Pa (which is 10\u2075 Pa, so answer should be 100,000 Pa.)<\/p>\n\n\n\n

79. What happens to the pressure if the temperature of a gas increases at constant volume?<\/mark><\/strong>
a) Pressure increases
b) Pressure decreases
c) Pressure remains same
d) None
Answer:<\/strong> a) Pressure increases
Explanation:<\/strong> Gay-Lussac\u2019s law.<\/p>\n\n\n\n

80. The pressure of a liquid at a certain depth is independent of:<\/mark><\/strong>
a) Density
b) Gravity
c) Surfac<\/mark>e area of liquid
d) Depth
Answer<\/strong>: c) Surface area of liquid
Explanation:<\/strong> Pressure depends on depth, density, gravity only.<\/p>\n\n\n\n

81. A hydraulic press uses:<\/mark><\/strong>
a) Gas pressure
b) Liquid pressure
c) Solid pressure
d) Atmospheric pressure
Answer:<\/strong> b) Liquid pressure
Explanation:<\/strong> Hydraulic press uses liquid to transmit pressure.<\/p>\n\n\n\n

82. Which of the following liquids has the highest pressure at a given depth?<\/mark><\/strong>
a) Water
b) Mercury
c) Alcohol
d) Kerosene
Answer:<\/strong> b) Mercury
Explanation:<\/strong> Mercury has the highest density.<\/p>\n\n\n\n

83. When you dive deep into the sea, your ears feel pain due to:<\/mark><\/strong>
a) Decreased pressure
b) Increased pressure
c) Temperature changes
d) Volume changes
Answer:<\/strong> b) Increased pressure
Explanation:<\/strong> Pressure increases with depth underwater.<\/p>\n\n\n\n

84. The unit of pressure in the CGS system is:<\/mark><\/strong>
a) Pascal
b) Dyne\/cm\u00b2
c) Newton\/m\u00b2
d) Bar
Answer:<\/strong> b) Dyne\/cm\u00b2
Explanation:<\/strong> CGS unit of pressure is dyne\/cm\u00b2.<\/p>\n\n\n\n

85. A force of 500 N acts on an area of 2 m\u00b2. What is the pressure?<\/mark><\/strong>
a) 100 Pa
b) 250 Pa
c) 500 Pa
d) 1000 Pa
Answer:<\/strong> b) 250 Pa
Explanation:<\/strong> Pressure = Force \/ Area = 500\/2 = 250 Pa.<\/p>\n\n\n\n

86. Atmospheric pressure at sea level is approximately:<\/mark><\/strong>
a) 76 cm Hg
b) 760 mm Hg
c) 101325 Pa
d) All of the above
Answer:<\/strong> d) All of the above
Explanation:<\/strong> All represent atmospheric pressure at sea level.<\/p>\n\n\n\n

87. Pressure in a liquid depends on:<\/mark><\/strong>
a) Depth
b) Density
c) Gravity
d) All
Answer:<\/strong> d) All
Explanation:<\/strong> P = \u03c1gh.<\/p>\n\n\n\n

88. Which principle is used in hydraulic machines?<\/mark><\/strong>
a) Bernoulli\u2019s
b) Archimedes\u2019
c) Pascal\u2019s
d) Boyle\u2019s
Answer:<\/strong> c) Pascal\u2019s
Explanation:<\/strong> Pressure transmitted equally in fluids.<\/p>\n\n\n\n

89. The pressure inside a tire is called:<\/mark><\/strong>
a) Atmospheric pressure
b) Gauge pressure
c) Absolute pressure
d) Vacuum pressure
Answer:<\/strong> b) Gauge pressure
Explanation:<\/strong> Pressure above atmospheric pressure is gauge pressure.<\/p>\n\n\n\n

90. Which is true about pressure in a fluid?<\/mark><\/strong>
a) It acts perpendicular to surface
b) It acts parallel to surface
c) It acts randomly
d) None
Answer:<\/strong> a) It acts perpendicular to surface
Explanation:<\/strong> Fluid pressure acts normal to any surface.<\/p>\n\n\n\n

91. If the density of a fluid is 1000 kg\/m\u00b3 and depth is 10 m, pressure exerted is:<\/mark><\/strong>
a) 10,000 Pa
b) 1000 Pa
c) 100,000 Pa
d) 1,000,000 Pa
Answer:<\/strong> c) 100,000 Pa
Explanation:<\/strong> P = \u03c1gh = 1000 \u00d7 10 \u00d7 10 = 100,000 Pa.<\/p>\n\n\n\n

92. Which of the following is true about liquid pressure?<\/mark><\/strong>
a) It acts only downward
b) It acts equally in all directions
c) It acts only upward
d) It acts randomly
Answer:<\/strong> b) It acts equally in all directions
Explanation:<\/strong> Pressure at a point in fluid acts equally in all directions.<\/p>\n\n\n\n

93. The pressure exerted by blood is measured in:<\/mark><\/strong>
a) Pascal
b) mmHg
c) Newton
d) Joule
Answer:<\/strong> b) mmHg
Explanation:<\/strong> Blood pressure is measured in mmHg.<\/p>\n\n\n\n

94. Which law states that pressure applied to a confined fluid is transmitted equally?<\/mark><\/strong>
a) Archimedes\u2019 principle
b) Pascal\u2019s law
c) Boyle\u2019s law
d) Charles\u2019 law
Answer:<\/strong> b) Pascal\u2019s law
Explanation:<\/strong> Pressure applied anywhere is transmitted equally.<\/p>\n\n\n\n

95. The density of mercury is about:<\/mark><\/strong>
a) 13.6 g\/cm\u00b3
b) 1 g\/cm\u00b3
c) 0.8 g\/cm\u00b3
d) 10 g\/cm\u00b3
Answer:<\/strong> a) 13.6 g\/cm\u00b3
Explanation:<\/strong> Mercury\u2019s density is 13.6 times water.<\/p>\n\n\n\n

96. Pressure due to liquid column is directly proportional to:<\/mark><\/strong>
a) Area of liquid surface
b) Depth of liquid
c) Volume of liquid
d) Shape of container
Answer:<\/strong> b) Depth of liquid
Explanation:<\/strong> Pressure increases with depth.<\/p>\n\n\n\n

97. Force per unit area is called:<\/mark><\/strong>
a) Pressure
b) Energy
c) Work
d) Power
Answer:<\/strong> a) Pressure
Explanation:<\/strong> Definition of pressure.<\/p>\n\n\n\n

98. Which instrument measures atmospheric pressure?<\/mark><\/strong>
a) Thermometer
b) Barometer
c) Manometer
d) Hydrometer
Answer:<\/strong> b) Barometer
Explanation:<\/strong> Barometer measures atmospheric pressure.<\/p>\n\n\n\n

99. Pressure due to a fluid column is proportional to:<\/mark><\/strong>
a) Square of depth
b) Depth
c) Inverse of depth
d) Square root of depth
Answer:<\/strong> b) Depth
Explanation:<\/strong> Pressure \u221d depth.<\/p>\n\n\n\n

100. What is the SI unit of pressure?<\/mark><\/strong>
a) Newton
b) Pascal
c) Joule
d) Watt
Answer:<\/strong> b) Pascal
Explanation:<\/strong> SI unit of pressure is Pascal (N\/m\u00b2).<\/p>\n","protected":false},"excerpt":{"rendered":"

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