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MCQs

Total Questions : 1058 | Page 94 of 106 pages
Question 931. A gas is compressed in a cylinder by a movable piston to a volume one half its original volume. During the process 300 kJ heat left the gas and internal energy remained same. The work done on gas in Nm will be
  1.    300 Nm
  2.    300,000 Nm
  3.    30 Nm
  4.    3000 Nm
 Discuss Question
Answer: Option B. -> 300,000 Nm
Question 932. According to Dalton's law, the total pressure of the mixture of gases is equal to
  1.    Sum of the partial pressures of all divided by average molecular weight
  2.    Average of the partial pressures of all
  3.    Greater of the partial pressures of all
  4.    Sum of the partial pressures of all
 Discuss Question
Answer: Option D. -> Sum of the partial pressures of all
Question 933. One molecule of oxygen is __________ times heavier than the hydrogen atom.
  1.    14
  2.    12
  3.    32
  4.    16
 Discuss Question
Answer: Option C. -> 32
Question 934. The oxygen atom is ________ times heavier than the hydrogen atom.
  1.    2
  2.    16
  3.    32
  4.    8
 Discuss Question
Answer: Option B. -> 16
Question 935. If heat be exchanged in a reversible manner, which of the following property of the working substance will change accordingly
  1.    Enthalpy
  2.    Temperature
  3.    Internal energy
  4.    Entropy
 Discuss Question
Answer: Option D. -> Entropy
Question 936. During throttling process
  1.    There is no change of internal energy of steam
  2.    No work is done by expanding steam
  3.    Heat exchange does not take place
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 937. Stirling and Ericsson cycles are
  1.    Reversible cycles
  2.    Quasi-static cycles
  3.    Irreversible cycles
  4.    Semi-reversible cycles
 Discuss Question
Answer: Option A. -> Reversible cycles
Question 938. In an ideal gas turbine plant, it is assumed that the compression and expansion processes are
  1.    None of these
  2.    Polytropic
  3.    Isothermal
  4.    Isentropic
 Discuss Question
Answer: Option D. -> Isentropic
Question 939. Which of the following has the minimum atomic mass?
  1.    Nitrogen
  2.    Sulphur
  3.    Carbon
  4.    Oxygen
 Discuss Question
Answer: Option C. -> Carbon
Question 940. The index of compression ‘n’ tends to reach ratio of specific heats ‘y’ when
  1.    Process is isentropic and specific heat does not change with temperature
  2.    Process is isentropic
  3.    Flow is uniform and steady
  4.    Process is isothermal
 Discuss Question
Answer: Option A. -> Process is isentropic and specific heat does not change with temperature

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