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MCQs

Total Questions : 175 | Page 3 of 18 pages
Question 21. What is the electromagnetic spectrum?
  1.    Radiation spectrum consisting only of UV and visible rays
  2.    All rays falling in the category of infrared and UV rays
  3.    All rays falling in the category of gamma and x-rays
  4.    Radiation spectrum encompassing all types of radiation
 Discuss Question
Answer: Option D. -> Radiation spectrum encompassing all types of radiation
Answer: (d).Radiation spectrum encompassing all types of radiation
Question 22. What is indirect solar radiation?
  1.    Solar radiation directly received by earth’s surface from sun
  2.    Solar radiation received by earth’s surface after scattering
  3.    Cosmic radiation directly received by earth’s surface
  4.    Cosmic radiation received by earth’s surface after reflection
 Discuss Question
Answer: Option B. -> Solar radiation received by earth’s surface after scattering
Answer: (b).Solar radiation received by earth’s surface after scattering
Question 23. What type of radiation does earth emit?
  1.    UV
  2.    Visible
  3.    Infrared
  4.    Longitudinal
 Discuss Question
Answer: Option C. -> Infrared
Answer: (c).Infrared
Question 24. Which of the following is responsible for thermal energy?
  1.    UV
  2.    Infrared
  3.    Gamma
  4.    UV-A
 Discuss Question
Answer: Option B. -> Infrared
Answer: (b).Infrared
Question 25. Which of the following type of UV radiation inhibits photosynthetic reaction in phytoplankton?
  1.    UV-A
  2.    UV-C
  3.    Infrared
  4.    Gamma rays
 Discuss Question
Answer: Option A. -> UV-A
Answer: (a).UV-A
Question 26. What is an equinox?
  1.    When earth is farthest from the sun
  2.    When earth is nearest to the sun
  3.    When earth’s center lies in the plane of sun
  4.    When earth’s center does not lie in the plane of sun
 Discuss Question
Answer: Option C. -> When earth’s center lies in the plane of sun
Answer: (c).When earth’s center lies in the plane of sun
Question 27. The equinoxes are vernal equinox and autumnal equinox respectively.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 28. On summer solstice, the sun is above the horizon in northern hemisphere.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 29. Why does earth receive 12 hours of sunshine during equinox?
  1.    Because earth’s center lies on the plane of the sun
  2.    Because earth’s center does not lie on the plane of the sun
  3.    Because earth is nearest to the sun
  4.    Because earth’s axis is perpendicular to the plane of the sun
 Discuss Question
Answer: Option D. -> Because earth’s axis is perpendicular to the plane of the sun
Answer: (d).Because earth’s axis is perpendicular to the plane of the sun
Question 30. What is the sun’s declination angle during equinox?
  1.    0 degrees
  2.    1 degree
  3.    13 degrees
  4.    23.5 degrees
 Discuss Question
Answer: Option A. -> 0 degrees
Answer: (a).0 degrees

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