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Thermodynamics problems

  • 1. First law of thermodynamics deals with

  • Options
  • A. conservation of heat
  • B. conservation of momentum
  • C. conservation of mass
  • D. conservation of energy
    • Discuss
  • 2. The air standard efficiency of an Otto cycle is given by (where r = Compression ratio, and ? = Ratio of specific heats)

  • Options
  • A. 1 - r? - 1
  • B. 1 + r? - 1
  • C.
  • D.
    • Discuss
  • 3. It is impossible to transfer heat from a body at a lower temperature to a body at a higher temperature, without the aid of an external source.

  • Options
  • A. Correct
  • B. Incorrect
    • Discuss
  • 4. When gas is heated at constant pressure, the heat supplied is utilised in

  • Options
  • A. increasing the internal energy of gas
  • B. doing some external work
  • C. increasing the internal energy of gas and also for doing some external work
  • D. none of the above
    • Discuss
  • 5. Both the Ericsson and Joule's cycle have two constant pressure processes.

  • Options
  • A. True
  • B. False
    • Discuss
  • 6. The atomic mass of sulphur is

  • Options
  • A. 12
  • B. 14
  • C. 16
  • D. 32
    • Discuss
  • 7. When the gas is heated at constant pressure, the heat supplied

  • Options
  • A. increases the internal energy of the gas
  • B. increases the temperature of the gas
  • C. does some external work during expansion
  • D. Both (B) and (C)
    • Discuss
  • 8. It is __________ to make an engine working on a Carnot cycle.

  • Options
  • A. possible
  • B. impossible
    • Discuss
  • 9. If the carbon content in the bituminous coal is 78 to 81%, it is said to be coking bituminous coal.

  • Options
  • A. Agree
  • B. Disagree
    • Discuss
  • 10. The mass of carbon per kg of flue gas is given by

  • Options
  • A.
  • B.
  • C.
  • D.
    • Discuss

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