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MCQs

Total Questions : 1058 | Page 4 of 106 pages
Question 31. The efficiency of ericsson cycle is __________ carnot cycle.
  1.     Greater than
  2.     Less than
  3.     Equal to
  4.     None of these
 Discuss Question
Answer: Option C. ->  Equal to
Question 32. The throttling process is __________ process.
  1.     Reversible
  2.     Irreversible
  3.     Reversible or irreversible
  4.     None of these
 Discuss Question
Answer: Option B. ->  Irreversible
Question 33. When coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel, the process is known as __________ of fuel.
  1.     Atomization
  2.     Carbonization
  3.     Combustion
  4.     None of these
 Discuss Question
Answer: Option B. ->  Carbonization
Question 34. The atomic mass of nitrogen is __________ oxygen.
  1.     Equal to
  2.     Less than
  3.     More than
  4.     None of these
 Discuss Question
Answer: Option B. ->  Less than
Question 35. A manufacturer claims to have a heat engine capable of developing 20 h.p. by receiving heat input of 400 kcal/mt and working between the temperature limits of 227° c and 27° c. his claim is
  1.     Theoretically possible
  2.     Not possible
  3.     May be possible with lot of sophistications
  4.     Cost will be very high
 Discuss Question
Answer: Option B. ->  Not possible
Question 36. The variables which control the physical properties of a perfect gas are
  1.     Pressure exerted by the gas
  2.     Volume occupied by the gas
  3.     Temperature of the gas
  4.     All of these
 Discuss Question
Answer: Option D. ->  All of these
Question 37. Characteristic gas constant of a gas is equal to
  1.     Cp /Cv
  2.     Cv /Cp
  3.     Cp - Cv
  4.     Cp + Cv
 Discuss Question
Answer: Option C. ->  Cp - Cv
Question 38. The amount of heat required to raise the temperature of __________ water through one degree is called kilojoules.
  1.     1 g
  2.     10 g
  3.     100 g
  4.     1000 g
 Discuss Question
Answer: Option D. ->  1000 g
Question 39. In closed cycle gas turbine, the air is compressed
  1.     Isothermally
  2.     Isentropically
  3.     Polytropically
  4.     None of these
 Discuss Question
Answer: Option B. ->  Isentropically
Question 40. According to avogadro's hypothesis
  1.     The molecular weights of all the perfect gases occupy the same volume under same conditions of pressure and temperature
  2.     The sum of partial pressure of mixture of two gases is sum of the two
  3.     Product of the gas constant and the molecular weight of an ideal gas is constant
  4.     Gases have two values of specific heat
 Discuss Question
Answer: Option A. ->  The molecular weights of all the perfect gases occupy the same volume under same conditions of pressure and temperature

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