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MCQs

Laws Of Thermodynamics

Total Questions : 1462 | Page 8 of 147 pages
Question 71. The value of universal gas constant is same for all gases.
  1.    Yes
  2.    No
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option A. -> Yes
Answer: (a).Yes
Question 72. The general law of expansion or compression is pvn = C, The process is said to be hyperbolic, if n is equal to
  1.    0
  2.    1
  3.    γ
  4.    ∝
 Discuss Question
Answer: Option B. -> 1
Answer: (b).1
Question 73. The numerical value of the thermal capacity and the water equivalent of the substance are the same.
  1.    Agree
  2.    Disagree
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option A. -> Agree
Answer: (a).Agree
Question 74. The area under the temperature-entropy curve (i. e. T - s curve) of any thermodynamic process represents the workdone during the process.
  1.    Agree
  2.    Disagree
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option B. -> Disagree
Answer: (b).Disagree
Question 75. The heating of a gas at constant pressure is governed by Charles' law.
  1.    True
  2.    False
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 76. 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.
Answer: (b).In the closed cycle gas turbine, the pressure range depends upon the atmospheric pressure.
Question 77. Carnot cycle consists of
  1.    two constant volume and two isentropic processes
  2.    two isothermal and two isentropic processes
  3.    two constant pressure and two isentropic processes
  4.    one constant volume, one constant pressure and two isentropic processes
 Discuss Question
Answer: Option B. -> two isothermal and two isentropic processes
Answer: (b).two isothermal and two isentropic processes
Question 78. When a gas is heated at constant volume
  1.    its temperature will increase
  2.    its pressure will increase
  3.    both temperature and pressure will increase
  4.    neither temperature nor pressure will increase
 Discuss Question
Answer: Option C. -> both temperature and pressure will increase
Answer: (c).both temperature and pressure will increase
Question 79. 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
Answer: (c).26.03 bar
Question 80. Otto cycle consists of
  1.    two constant volume and two isentropic processes
  2.    two constant pressure and two isentropic processes
  3.    two constant volume and two isothermal processes
  4.    one constant pressure, one constant volume and two isentropic processes
 Discuss Question
Answer: Option A. -> two constant volume and two isentropic processes
Answer: (a).two constant volume and two isentropic processes

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