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MCQs

Total Questions : 1058 | Page 11 of 106 pages
Question 101. Which of the following process can be made reversible with the help of a regenerator?
  1.     Constant pressure process
  2.     Constant volume process
  3.     Constant pvn process
  4.     All of these
 Discuss Question
Answer: Option D. ->  All of these
Question 102. The efficiency of joule cycle is
  1.     Less than Carnot cycle
  2.     Equal to Carnot cycle
  3.     Greater than Carnot cycle
  4.     None of these
 Discuss Question
Answer: Option A. ->  Less than Carnot cycle
Question 103. Zeroth law of thermodynamics
  1.     Deals with conversion of mass and energy
  2.     Deals with reversibility and irreversibility of process
  3.     States that if two systems are both in equilibrium with a third system, they are in thermal equilibrium with each other
  4.     Deals with heat engines
 Discuss Question
Answer: Option C. ->  States that if two systems are both in equilibrium with a third system, they are in thermal equilibrium with each other
Question 104. The ratio of molar specific heats for mono-atomic gas is
  1.     1
  2.     1.4
  3.     1.67
  4.     1.87
 Discuss Question
Answer: Option C. ->  1.67
Question 105. The statement that molecular weights of all gases occupy the same volume is known as
  1.     Avogadro's hypothesis
  2.     Dalton's law
  3.     Gas law
  4.     Law of thermodynamics
 Discuss Question
Answer: Option A. ->  Avogadro's hypothesis
Question 106. According to clausius statement of second law of thermodynamics
  1.     Heat can
  2.     Heat can be transferred for low temperature to high temperature source by using refrigeration cycle
  3.     Heat can be transferred from low temperature to high temperature source if COP of process is more than unity
  4.     Heat can
 Discuss Question
Answer: Option D. ->  Heat can
Question 107. The specific heat at constant volume is
  1.     The amount of heat required to raise the temperature of unit mass of gas through one degree, at constant volume
  2.     The amount of heat required to raise the temperature of unit mass of gas through one degree, at constant pressure
  3.     The amount of heat required to raise the temperature of 1 kg of water through one degree
  4.     Any one of the above
 Discuss Question
Answer: Option A. ->  The amount of heat required to raise the temperature of unit mass of gas through one degree, at constant volume
Question 108. When the gas is cooled at constant pressure,
  1.     Its temperature increases but volume decreases
  2.     Its volume increases but temperature decreases
  3.     Both temperature and volume increases
  4.     Both temperature and volume decreases
 Discuss Question
Answer: Option D. ->  Both temperature and volume decreases
Question 109. Which of the following is the correct statement?
  1.     For a given compression ratio, both Otto and Diesel cycles have the same efficiency
  2.     For a given compression ratio, Otto cycle is more efficient than Diesel cycle
  3.     For a given compression ratio, Diesel cycle is more efficient than Otto cycle
  4.     The efficiency of Otto or Diesel cycle has nothing to do with compression ratio
 Discuss Question
Answer: Option B. ->  For a given compression ratio, Otto cycle is more efficient than Diesel cycle
Question 110. Which of the following is correct?
  1.     Absolute pressure = Gauge pressure + Atmospheric pressure
  2.     Gauge pressure = Absolute pressure + Atmospheric pressure
  3.     Atmospheric pressure = Absolute pressure + Gauge pressure
  4.     Absolute pressure = Gauge pressure - Atmospheric pressure
 Discuss Question
Answer: Option A. ->  Absolute pressure = Gauge pressure + Atmospheric pressure

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