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MCQs

Total Questions : 1058 | Page 76 of 106 pages
Question 751. The efficiency and work ratio of a simple gas turbine cycle are
  1.    High
  2.    Very high
  3.    Low
  4.    Very low
 Discuss Question
Answer: Option D. -> Very low
Question 752. Compressed air coming out from a punctured football
  1.    Becomes cooler
  2.    Becomes hotter
  3.    May become hotter or cooler depending upon the humidity of the surrounding air
  4.    Remains at the same temperature
 Discuss Question
Answer: Option A. -> Becomes cooler
Question 753. A cycle consisting of one constant pressure, one constant volume and two isentropic processes is known as
  1.    Otto cycle
  2.    Diesel cycle
  3.    Stirling cycle
  4.    Carnot cycle
 Discuss Question
Answer: Option B. -> Diesel cycle
Question 754. A cycle consisting of two constant pressure and two isentropic processes is known as
  1.    Otto cycle
  2.    Carnot cycle
  3.    None of the listed here
  4.    Stirling cycle
 Discuss Question
Answer: Option C. -> None of the listed here
Question 755. Which of the following quantities is not the property of the system?
  1.    Specific volume
  2.    Temperature
  3.    Pressure
  4.    Heat
 Discuss Question
Answer: Option D. -> Heat
Question 756. According to First law of thermodynamics,
  1.    Total internal energy of a system during a process remains constant
  2.    Internal energy, enthalpy and entropy during a process remain constant
  3.    Work-done by a system is equal to the heat transferred by the system
  4.    Total energy of a system remains constant
 Discuss Question
Answer: Option D. -> Total energy of a system remains constant
Question 757. The ideal efficiency of a Brayton cycle with regeneration, with increase in pressure ratio will
  1.    Decrease
  2.    Increase
  3.    Remain unchanged
  4.    Increase/decrease depending on application
 Discuss Question
Answer: Option A. -> Decrease
Question 758. The ideal efficiency of a Brayton cycle without regeneration, with increase in pressure ratio will
  1.    Decrease
  2.    Increase
  3.    Increase/decrease depending on application
  4.    Remain unchanged
 Discuss Question
Answer: Option B. -> Increase
Question 759. The air standard efficiency of an Otto cycle is given by (where r = Compression ratio, and γ = Ratio of specific heats)
  1.    1 + rγ - 1
  2.    1 - (1/ rγ - 1)
  3.    1 - rγ - 1
  4.    1 + (1/ rγ - 1)
 Discuss Question
Answer: Option B. -> 1 - (1/ rγ - 1)
Question 760. One kg of carbon produces ___ kg of carbon dioxide.
  1.    11/3
  2.    11/7
  3.    4/11
  4.    3/7
 Discuss Question
Answer: Option A. -> 11/3

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