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MCQs

Total Questions : 1058 | Page 5 of 106 pages
Question 41. A process of heating crude oil to a high temperature under a very high pressure to increase the yield of lighter distillates, is known as
  1.     Cracking
  2.     Carbonization
  3.     Fractional distillation
  4.     Full distillation
 Discuss Question
Answer: Option A. ->  Cracking
Question 42. Which of the following statement is wrong?
  1.     The closed cycle gas turbine plants are external combustion plants.
  2.     In the closed cycle gas turbine, the pressure range depends upon the atmospheric pressure.
  3.     The advantage of efficient internal combustion is eliminated as the closed cycle has an external surface.
  4.     In open cycle gas turbine, atmosphere acts as a sink and no coolant is required.
 Discuss Question
Answer: Option B. ->  In the closed cycle gas turbine, the pressure range depends upon the atmospheric pressure.
Question 43. First law of thermodynamics furnishes the relationship between
  1.     Heat and work
  2.     Heat, work and properties of the system
  3.     Various properties of the system
  4.     Various thermodynamic processes
 Discuss Question
Answer: Option B. ->  Heat, work and properties of the system
Question 44. The absolute zero temperature is taken as
  1.     237°C
  2.     -273°C
  3.     -237°C
  4.     273°C
 Discuss Question
Answer: Option B. ->  -273°C
Question 45. The basis for measuring thermodynamic property of temperature is given by
  1.     Zeroth law of thermodynamics
  2.     First law of thermodynamics
  3.     Second law of thermodynamics
  4.     Third law of thermodynamics
 Discuss Question
Answer: Option A. ->  Zeroth law of thermodynamics
Question 46. One kg of carbon requires 4/3 kg of oxygen and produces __________ kg of carbon monoxide gas.
  1.     8/3
  2.     11/3
  3.     11/7
  4.     7/3
 Discuss Question
Answer: Option D. ->  7/3
Question 47. According to regnault's law, the specific heat at constant pressure (cp) and specific heat at constant volume (cv) _________ with the change in pressure and temperature of the gas.
  1.     Change
  2.     Do not change
  3.     Both (A) and (B)
  4.     None of these
 Discuss Question
Answer: Option B. ->  Do not change
Question 48. The entropy may be expressed as a function of
  1.     Pressure and temperature
  2.     Temperature and volume
  3.     Heat and work
  4.     All of these
 Discuss Question
Answer: Option A. ->  Pressure and temperature
Explanation :
Question 49. A molecule consisting of one atom is known as
  1.     Mono-atomic
  2.     Di-atomic
  3.     Tri-atomic
  4.     Poly-atomic
 Discuss Question
Answer: Option A. ->  Mono-atomic
Explanation :
Question 50. Which of the following processes are thermodynamically reversible?
  1.     Throttling
  2.     Free expansion
  3.     Constant volume and constant pressure
  4.     Isothermal and adiabatic
 Discuss Question
Answer: Option D. ->  Isothermal and adiabatic

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