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MCQs

Total Questions : 207 | Page 3 of 21 pages
Question 21. In absorber refrigeration, the solution of working fluid (ammonia) is pumped to a low pressure with a big pump.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 22. What is pasteurization?
  1.    Process of treating water by biological techniques
  2.    Process of treating water by heating it mildly
  3.    Process of producing water
  4.    Process of capturing sun’s heat
 Discuss Question
Answer: Option B. -> Process of treating water by heating it mildly
Answer: (b).Process of treating water by heating it mildly
Question 23. Which of the following principles is used to concentrate sunlight in solar cookers?
  1.    Rarefaction
  2.    Evaporation
  3.    Specular reflection
  4.    Radiation
 Discuss Question
Answer: Option C. -> Specular reflection
Answer: (c).Specular reflection
Question 24. Vapour compression refrigeration system is less complex than absorber refrigeration system.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 25. What is solar cooker?
  1.    Uses direct sunlight to produce heat and cook food
  2.    Uses solar energy to evaporate water and collect it within the same closed system
  3.    Uses solar energy to dry substances
  4.    Uses concentrated solar power to for industry
 Discuss Question
Answer: Option A. -> Uses direct sunlight to produce heat and cook food
Answer: (a).Uses direct sunlight to produce heat and cook food
Question 26. What is the maximum temperature used in cooking?
  1.    100° C for boiling water and related dishes
  2.    400° C for grilling and searing
  3.    800° C for melting metals
  4.    30° C for melting food items like butter
 Discuss Question
Answer: Option B. -> 400° C for grilling and searing
Answer: (b).400° C for grilling and searing
Question 27. Which of the following majorly affects the phenomenon of concentrating sunlight?
  1.    Non-reflecting surface
  2.    Black surface
  3.    Type of food
  4.    Geometry of the reflecting structure
 Discuss Question
Answer: Option D. -> Geometry of the reflecting structure
Answer: (d).Geometry of the reflecting structure
Question 28. What is the typical temperature (range) used in domestic cooking?
  1.    50 – 70° C
  2.    1000° C
  3.    3500° C
  4.    300 – 500° C
 Discuss Question
Answer: Option A. -> 50 – 70° C
Answer: (a).50 – 70° C
Question 29. The cooking pan used in solar cookers convert ______ energy to ______ energy.
  1.    electrical, heat
  2.    heat, light
  3.    light, heat
  4.    electrical, light
 Discuss Question
Answer: Option C. -> light, heat
Answer: (c).light, heat
Question 30. Which of the following materials are used to make the cooking pan in a solar cooker?
  1.    Wood
  2.    Plastic
  3.    Rubber
  4.    Iron
 Discuss Question
Answer: Option D. -> Iron
Answer: (d).Iron

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