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MCQs

Total Questions : 1058 | Page 2 of 106 pages
Question 11. Reversed joule cycle is called
  1.     Carnot cycle
  2.     Rankine cycle
  3.     Brayton cycle
  4.     Bell Coleman cycle
 Discuss Question
Answer: Option D. ->  Bell Coleman cycle
Explanation :
Question 12. The pressure of a gas in terms of its mean kinetic energy per unit volume 'e' is equal to
  1.     E/3
  2.     E/2
  3.     3E/4
  4.     2E/3
 Discuss Question
Answer: Option D. ->  2E/3
Question 13. The efficiency of a carnot engine depends on
  1.     Working substance
  2.     Design of engine
  3.     Size of engine
  4.     Temperatures of source and sink
 Discuss Question
Answer: Option D. ->  Temperatures of source and sink
Question 14. The temperature at which the volume of a gas becomes zero is called
  1.     Absolute scale of temperature
  2.     Absolute zero temperature
  3.     Absolute temperature
  4.     None of these
 Discuss Question
Answer: Option B. ->  Absolute zero temperature
Question 15. Which of the following gas has a minimum molecular mass?
  1.     Nitrogen
  2.     Hydrogen
  3.     Methane
  4.     Oxygen
 Discuss Question
Answer: Option B. ->  Hydrogen
Question 16. Which of the following is the extensive property of a thermodynamic system?
  1.     Pressure
  2.     Volume
  3.     Temperature
  4.     Density
 Discuss Question
Answer: Option B. ->  Volume
Question 17. Second law of thermodynamics defines
  1.     Heat
  2.     Work
  3.     Internal energy
  4.     Entropy
 Discuss Question
Answer: Option D. ->  Entropy
Question 18. Which is the incorrect statement about carnot cycle?
  1.     All the heat engines are based on Carnot cycle
  2.     It is used as the alternate standard of comparison of all heat engines
  3.     It provides concept of maximising work output between the two temperature limits
  4.     All of the above
 Discuss Question
Answer: Option A. ->  All the heat engines are based on Carnot cycle
Question 19. The reading of the pressure gauge fitted on a vessel is 25 bar. the atmospheric pressure is 1.03 bar and the value of 'g' is 9.81 m/s2. the absolute pressure in the vessel is
  1.     23.97 bar
  2.     25 bar
  3.     26.03 bar
  4.     34.81 bar
 Discuss Question
Answer: Option C. ->  26.03 bar
Question 20. The absolute zero pressure will be
  1.     When molecular momentum of the system becomes zero
  2.     At sea level
  3.     At the temperature of - 273 K
  4.     At the center of the earth
 Discuss Question
Answer: Option A. ->  When molecular momentum of the system becomes zero

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