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Q51. Which of the following statements is true?
- AThe increase and decrease of air pressure is called "air pressure gradient".
- BThe fluctuations in air pressure decrease from the equator towards the poles.
- C60 Diurnal fluctuations in air pressure are not observed beyond latitude
- Dall of the above
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Answer: D) all of the above
Q52. What is the number of pressure belts on the globe?
- A5
- B6
- C7
- D9
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Answer: C) 7
Q53. Up to how many latitudes does the equatorial low pressure belt extend on both sides of the equator?
- A5⁰
- B10⁰
- C15⁰
- D20⁰
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Answer: A) 5⁰
Q54. The expansion of the doldrum belt is generally found in-
- A0⁰ -5⁰ Answer
- B0⁰ -5⁰ South
- C0⁰ -10⁰ Answer
- D5⁰ North -5⁰ South
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Answer: D) 5⁰ North -5⁰ South
Q55. The doldrums region is characterized by
- Alow pressure and air subsidence
- Blow pressure and gentle easterly wind
- Cnormal pressure and depression of air
- Dlow pressure and calm winds
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Answer: D) low pressure and calm winds
Q56. The calm belt is found on both sides of which line?
- AEquator
- BTropic of Cancer
- CCapricorn
- Darctic line
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Answer: A) Equator
Q57. All the hot deserts of the world are located in which of the following belts?
- Aequatorial low pressure belt
- Bsubtropical high pressure belt
- Csubpolar low pressure belt
- Dpolar high pressure belt
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Answer: B) subtropical high pressure belt
Q58. Which layer is found above the troposphere in the atmosphere?
- Astratosphere
- Bmesosphere
- Cthermosphere
- Dexosphere
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Answer: A) stratosphere
Q59. The ozone layer is at a height above the earth-
- A50 km.
- B300 km.
- C2000 km.
- D20 km.
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Answer: D) 20 km.
Q60. Where are jet streams usually found?
- Ain the ozone layer
- Bin the tropopause
- Cin the mesosphere
- Din the ionosphere
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Answer: B) in the tropopause
Q61. The number of atmospheric layers present above the Earth is-
- A4
- B5
- C2
- D3
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Answer: B) 5
Q62. Consider the following constituent gases of the atmosphere - 1. Argon 2. Neon 3. Helium 4. Carbon dioxide Which of the following is the correct ascending order of the above gases in terms of percentage by volume?
- A3-2-4-1
- B1-4-2-3
- C4-2-3-1
- D2-4-1-3
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Answer: A) 3-2-4-1
Q63. Which of the following statements is correct regarding temperature?
- AThe temperature in the stratosphere decreases with altitude
- BThe temperature remains constant at different altitudes in the stratosphere
- CTemperature in the troposphere 6.5increases with altitude at an average rate of ⁰C per km
- DThe temperature in the troposphere decreases with altitude at an average rate of 6.4°C per km.
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Answer: D) The temperature in the troposphere decreases with altitude at an average rate of 6.4°C per km.
Q64. Which of the following statements is not correct regarding the mesosphere?
- AMeteorites burn up upon entering this layer from space.
- BIn this layer, the temperature increases rapidly with increasing altitude.
- CThis is the third layer of the atmosphere.
- DIt is directly above the stratosphere
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Answer: B) In this layer, the temperature increases rapidly with increasing altitude.
Q65. Which is the lowest layer in the vertical structure of the atmosphere?
- Astratosphere
- Bmesosphere
- Ctroposphere
- Dthermosphere
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Answer: C) troposphere
Q66. Which of the following layers is the upper limit of our atmosphere, extending from the top of the thermosphere to 1,000 km (6,200 mi)?
- Aexosphere
- Btropopause
- Cmesosphere
- Dionosphere
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Answer: A) exosphere
