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MCQs

Total Questions : 207 | Page 16 of 21 pages
Question 151. Which of the following use absorption refrigeration system?
  1.    Heating systems
  2.    Solar cooker
  3.    Waste heat from cogeneration
  4.    Solar stills
 Discuss Question
Answer: Option C. -> Waste heat from cogeneration
Answer: (c).Waste heat from cogeneration
Question 152. Which of the following is/are considered for calculating the overall efficiency of solar absorption refrigeration system?
  1.    Coefficient of performance of absorption system
  2.    Solar collection efficiency
  3.    Solar insolation
  4.    Solar collection efficiency and coefficient of performance of absorption system
 Discuss Question
Answer: Option D. -> Solar collection efficiency and coefficient of performance of absorption system
Answer: (d).Solar collection efficiency and coefficient of performance of absorption system
Question 153. What is coefficient of performance?
  1.    Ratio of refrigeration capacity to input solar energy
  2.    Ratio of input solar energy to refrigeration capacity
  3.    Product of input solar energy and refrigeration capacity
  4.    Ratio of refrigeration capacity to input electrical energy
 Discuss Question
Answer: Option A. -> Ratio of refrigeration capacity to input solar energy
Answer: (a).Ratio of refrigeration capacity to input solar energy
Question 154. In solar vapour compression cycle, efficiency of Rankine cycle increases with _______
  1.    decrease in temperature of heat exchanger
  2.    increase in temperature of heat exchanger
  3.    the amount of heat supplied to the evaporator
  4.    the amount of cold air released from the system
 Discuss Question
Answer: Option B. -> increase in temperature of heat exchanger
Answer: (b).increase in temperature of heat exchanger
Question 155. Absorption refrigeration uses _______ mechanical power input as compared to vapour compression refrigeration.
  1.    greater
  2.    the same
  3.    the same working fluid as
  4.    negligible
 Discuss Question
Answer: Option D. -> negligible
Answer: (d).negligible
Question 156. Efficiency of solar collector decreases with ______
  1.    decrease in temperature of heat exchanger
  2.    increase in temperature of sun
  3.    increase in temperature
  4.    the amount of cold air given to the system
 Discuss Question
Answer: Option C. -> increase in temperature
Answer: (c).increase in temperature
Question 157. How is pressurization achieved in absorber refrigeration?
  1.    By dissolving refrigerant in absorbent in the absorber section
  2.    By dissolving refrigerant in absorbent in the evaporation section
  3.    By evaporating refrigerant from absorbent in the absorber section
  4.    By evaporating refrigerant in absorbent in the evaporation section
 Discuss Question
Answer: Option A. -> By dissolving refrigerant in absorbent in the absorber section
Answer: (a).By dissolving refrigerant in absorbent in the absorber section
Question 158. Which of the following are used to manufacture parabolic dish concentrator?
  1.    Anodized aluminum
  2.    Wood
  3.    Bakelite
  4.    Iron
 Discuss Question
Answer: Option A. -> Anodized aluminum
Answer: (a).Anodized aluminum
Question 159. Convection should be reduced by isolating air inside the cooker from air outside the cooker.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 160. Evacuated tube solar cookers use ________ glass tube for the cooking chamber.
  1.    highly insulated
  2.    thermal conducting
  3.    parabolic
  4.    cone shaped
 Discuss Question
Answer: Option A. -> highly insulated
Answer: (a).highly insulated

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