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MCQs

Total Questions : 207 | Page 2 of 21 pages
Question 11. Which of the following are types of solar concentrators?
  1.    Solar air collectors
  2.    Flat-plate collectors
  3.    Parabolic flat plate collectors
  4.    Linear Fresnel collectors
 Discuss Question
Answer: Option D. -> Linear Fresnel collectors
Answer: (d).Linear Fresnel collectors
Question 12. Solar air collectors transfer sun’s thermal energy to air via ______
  1.    conduction
  2.    convection
  3.    Seebeck effect
  4.    Peltier effect
 Discuss Question
Answer: Option A. -> conduction
Answer: (a).conduction
Question 13. Active solar drying systems control _______ by fans.
  1.    water flow rate
  2.    food flow rate
  3.    electricity
  4.    air flow rate
 Discuss Question
Answer: Option D. -> air flow rate
Answer: (d).air flow rate
Question 14. Which of the following is an example of solar air heating/collection technology?
  1.    Drying food using hair dryer
  2.    Drying food under direct sun
  3.    Heating the food in oven
  4.    Grilling food in a barbeque
 Discuss Question
Answer: Option B. -> Drying food under direct sun
Answer: (b).Drying food under direct sun
Question 15. Which of the following groups are types of solar drying technology?
  1.    Indirect, direct and active, photovoltaic
  2.    Photovoltaic, direct and indirect, active
  3.    Indirect, direct and active, passive
  4.    Indirect, passive and active, direct
 Discuss Question
Answer: Option C. -> Indirect, direct and active, passive
Answer: (c).Indirect, direct and active, passive
Question 16. What does a refrigerant do in a vapour compression refrigeration system?
  1.    Removes heat from one system and empties it into another system
  2.    Adds heat to the system
  3.    Absorbs heat continuously
  4.    Converts thermal energy into electrical energy
 Discuss Question
Answer: Option A. -> Removes heat from one system and empties it into another system
Answer: (a).Removes heat from one system and empties it into another system
Question 17. It is important to ensure that _______ characteristics of motor matches that of PV array.
  1.    mechanical
  2.    thermal
  3.    insulating
  4.    electrical
 Discuss Question
Answer: Option D. -> electrical
Answer: (d).electrical
Question 18. How does the compression process between vapour compression and vapour absorption systems differ?
  1.    Vapour compression uses mechanical compression while vapour absorption uses thermal compression
  2.    Vapour compression and vapour absorption use thermal compression
  3.    Vapour compression and vapour absorption use thermal compression
  4.    Vapour compression uses electrical compression while vapour absorption uses mechanical compression
 Discuss Question
Answer: Option A. -> Vapour compression uses mechanical compression while vapour absorption uses thermal compression
Answer: (a).Vapour compression uses mechanical compression while vapour absorption uses thermal compression
Question 19. How does a photovoltaic refrigeration system work?
  1.    By converting sun’s thermal energy into electricity which is used to drive a motor coupled to a compressor
  2.    By converting sun’s thermal energy into electricity which is used to drive an AC motor coupled to a compressor of a vapour compression system
  3.    By converting sunlight into DC current to drive a DC motor which is coupled to a compressor of a vapour compression system
  4.    By converting sunlight into DC current which is used to drive an AC motor coupled to a compressor of a vapour compression system
 Discuss Question
Answer: Option C. -> By converting sunlight into DC current to drive a DC motor which is coupled to a compressor of a vapour compression system
Answer: (c).By converting sunlight into DC current to drive a DC motor which is coupled to a compressor of a vapour compression system
Question 20. Which of the following is an example of a refrigerant?
  1.    Platinum
  2.    CFCs
  3.    Argon
  4.    Nitrogen
 Discuss Question
Answer: Option B. -> CFCs
Answer: (b).CFCs

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