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MCQs

Total Questions : 207 | Page 4 of 21 pages
Question 31. Which of the following best describes the working of a solar cooker?
  1.    Concentrating sunlight → trapping heat → cooking
  2.    Concentrating sunlight → converting light to heat energy → trapping heat →cooking
  3.    Concentrating sunlight → cooking → trapping heat
  4.    Trapping heat → converting heat to light energy → radiating light → cooking
 Discuss Question
Answer: Option B. -> Concentrating sunlight → converting light to heat energy → trapping heat →cooking
Answer: (b).Concentrating sunlight → converting light to heat energy → trapping heat →cooking
Question 32. Solar cookers do have operating costs.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 33. What type is a solar panel cooker?
  1.    Absorber type
  2.    Reflector type
  3.    Adsorber type
  4.    Convection type
 Discuss Question
Answer: Option B. -> Reflector type
Answer: (b).Reflector type
Question 34. In terms of cost, solar panel cookers use _______ material.
  1.    low-cost
  2.    specially designed expensive
  3.    low-cost inefficient
  4.    expensive and extremely efficient
 Discuss Question
Answer: Option A. -> low-cost
Answer: (a).low-cost
Question 35. How is sunlight concentrated in solar panel cooker?
  1.    From below the cooker onto the cooking pan
  2.    Using photovoltaics
  3.    From above
  4.    From right side
 Discuss Question
Answer: Option C. -> From above
Answer: (c).From above
Question 36. Solar cooking is pollution free.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 37. Which of the following concentrates sunlight onto a focal point?
  1.    Plane mirrors
  2.    Parabolic mirrors
  3.    Silver coated surface
  4.    Black surface
 Discuss Question
Answer: Option B. -> Parabolic mirrors
Answer: (b).Parabolic mirrors
Question 38. Conventional cooking fuel is required to operate solar cookers.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 39. What is solar furnace?
  1.    Uses concentrated solar power to produce high temperatures for industry
  2.    Uses solar energy to evaporate water and collect it within the same closed system
  3.    Uses solar energy to dry substances
  4.    Uses solar energy to dry liquids
 Discuss Question
Answer: Option A. -> Uses concentrated solar power to produce high temperatures for industry
Answer: (a).Uses concentrated solar power to produce high temperatures for industry
Question 40. What is the typical range of temperature at the focal point of a parabolic mirror in solar furnaces?
  1.    Between 100 and 150° C
  2.    Upto 20° C
  3.    Between 1000 and 2000° C
  4.    Between 50 and 100° C
 Discuss Question
Answer: Option C. -> Between 1000 and 2000° C
Answer: (c).Between 1000 and 2000° C

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