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MCQs

Laws Of Thermodynamics

Total Questions : 1462 | Page 7 of 147 pages
Question 61. The natural solid fuel is
  1.    wood
  2.    coke
  3.    anthracite coal
  4.    pulverised coal
 Discuss Question
Answer: Option A. -> wood
Answer: (a).wood
Question 62. The condition for the reversibility of a cycle is
  1.    the pressure and temperature of the working substance must not differ, appreciably, from those of the surroundings at any stage in the process
  2.    all the processes, taking place in the cycle of operation, must be extremely slow
  3.    the working parts of the engine must be friction free
  4.    all of the above
 Discuss Question
Answer: Option D. -> all of the above
Answer: (d).all of the above
Question 63. Mond gas is obtained by
  1.    partial combusion of coal, coke, anthracite coal or charcoal in a mixed air steam blast
  2.    carbonisation of bituminous coal
  3.    passing steam over incandescent coke
  4.    passing air and a large amount of steam over waste coal at about 650°C
 Discuss Question
Answer: Option D. -> passing air and a large amount of steam over waste coal at about 650°C
Answer: (d).passing air and a large amount of steam over waste coal at about 650°C
Question 64. According to kinetic theory of gases, the kinetic energy of translation of a molecule is proportional to
  1.    T
  2.    T
  3.    1/T
  4.    1/T
 Discuss Question
Answer: Option B. -> T
Answer: (b).T
Question 65. The value of cp/cv for air is
  1.    1
  2.    1.4
  3.    1.8
  4.    23
 Discuss Question
Answer: Option B. -> 1.4
Answer: (b).1.4
Question 66. The amount of heat given out by the complete combustion of 1 kg of fuel is known as calorific value of solid or liquid fuel.
  1.    True
  2.    False
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 67. The conditions of temperature and pressure at 0°C (273K) and 760 mm of Hg pressure are termed as __________ temperature and pressure.
  1.    normal
  2.    standard
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option B. -> standard
Answer: (b).standard
Question 68. The heat absorbed or rejected by the working substance is given by (where ds = Increase or decrease of entropy, T = Absolute temperature, and dQ = Heat absorbed or rejected)
  1.    δQ = T.ds
  2.    δQ = T/ds
  3.    dQ = ds/T
  4.    none of these
 Discuss Question
Answer: Option A. -> δQ = T.ds
Answer: (a).δQ = T.ds
Question 69. The state of a substance whose evaporation from its liquid state is partial, is known as steam.
  1.    Agree
  2.    Disagree
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option B. -> Disagree
Answer: (b).Disagree
Question 70. The ratio of molar specific heats for monoatomic gas is
  1.    1
  2.    1.4
  3.    1.67
  4.    1.87
 Discuss Question
Answer: Option C. -> 1.67
Answer: (c).1.67

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