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MCQs

Total Questions : 21 | Page 2 of 3 pages
Question 11. The compression, condensation and expansion of refrigerant in a vapour compression refrigeration system is
  1.    Isenthalpic, isentropic and isothermal
  2.    Isentropic, Isochoric and isothermal
  3.    Isothermal, Isentropic and Isochoric
  4.    Isentropic, Isobaric and Isenthalpic
 Discuss Question
Answer: Option D. -> Isentropic, Isobaric and Isenthalpic
Question 12. What is done to increase the rate of heat transfer in the Velox boiler?
  1.    The boiler is heated up to very high range of temperature
  2.    Combustion gases are circulated through tubes with supersonic speed
  3.    High grade fuel is made use for the combustion
  4.    The size of the boiler is changed as it is flexible
 Discuss Question
Answer: Option B. -> Combustion gases are circulated through tubes with supersonic speed
Question 13. Which of the following relations depict relation between Celsius and Fahrenheit scale?
  1.    (oC / 5) = (oF – 32) / 9
  2.    (oC / 9) = (oF – 32) / 5
  3.    (oC / 32) = (oF – 9) / 5
  4.    None of these
 Discuss Question
Answer: Option A. -> (oC / 5) = (oF – 32) / 9
Question 14. Which of the following statements is not correct
  1.    A topping cycle plant generates electricity or mechanical power first
  2.    A bottoming cycle plant generates heat first
  3.    Both a and b
  4.    A bottoming cycle plant generates electricity or mechanical power first
 Discuss Question
Answer: Option D. -> A bottoming cycle plant generates electricity or mechanical power first
Question 15. A waste heat recovery steam generator is used with
  1.    steam turbines
  2.    back pressure turbines
  3.    gas turbines
  4.    condensing turbines
 Discuss Question
Answer: Option C. -> gas turbines
Question 16. What is a typical efficiency of a cogeneration system?
  1.    58%
  2.    85%
  3.    68%
  4.    95%
 Discuss Question
Answer: Option B. -> 85%
Question 17. The heat recovery device in which high conductivity bricks are used for storing heat is
  1.    heat pipe
  2.    heat pump
  3.    thermo compressor
  4.    regenerator
 Discuss Question
Answer: Option D. -> regenerator
Question 18. What is the pH value of water permissible for boiler?
  1.    0
  2.    5.5
  3.    6
  4.    8.5
 Discuss Question
Answer: Option D. -> 8.5
Question 19. Odometer is an instrument used for measurement of
  1.    power
  2.    Fuel consumption
  3.    Engine speed
  4.    distance
 Discuss Question
Answer: Option D. -> distance
Question 20. What is the function of air preheater?
  1.    To increase air temperature by flue gases
  2.    To increase water temperature by air
  3.    To increase steam temperature by air
  4.    To increase air temperature by steam
 Discuss Question
Answer: Option A. -> To increase air temperature by flue gases

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