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Home Mechanical Engineering Thermodynamics Comments

  • Question
  • Which of the following has the minimum atomic mass?


  • Options
  • A. Oxygen
  • B. Sulphur
  • C. Nitrogen
  • D. Carbon

  • Correct Answer
  • Carbon 


  • Thermodynamics problems


    Search Results


    • 1. One kg of carbon monoxide requires __________ kg of oxygen to produce 11/7 kg of carbon dioxide gas.

    • Options
    • A. All
    • B. 4/7
    • C. 11/4
    • D. 9/7
    • Discuss
    • 2. Which of the following is the lightest and most volatile liquid fuel?

    • Options
    • A. Gasoline
    • B. Kerosene
    • C. Fuel oil
    • Discuss
    • 3. There is no change in internal energy in an isothermal process.

    • Options
    • A. Correct
    • B. Incorrect
    • Discuss
    • 4. Which of the following represents Otto cycle on temperature - entropy (T - s) diagram?

    • Options
    • A.
    • B.
    • C.
    • D.
    • Discuss
    • 5. When the gas is heated at constant volume, the heat supplied increases the internal energy of the gas.

    • Options
    • A. True
    • B. False
    • Discuss
    • 6. Carbonisation of coal consists of

    • Options
    • A. drying and crushing the coal to a fine powder
    • B. moulding the finely ground coal under pressure with or without a binding material
    • C. heating the wood with a limited supply of air to temperature not less than 280°C
    • D. none of the above
    • Discuss
    • 7. According to Avogadro's law, the density of any two gases is __________ their molecular masses, if the gases are at the same temperature and pressure.

    • Options
    • A. equal to
    • B. directly proportional to
    • C. inversely proportional to
    • Discuss
    • 8. The entropy __________ in an irreversible cyclic process.

    • Options
    • A. remains constant
    • B. decreases
    • C. increases
    • Discuss
    • 9. An adiabatic process is one in which

    • Options
    • A. no heat enters or leaves the gas
    • B. the temperature of the gas changes
    • C. the change in internal energy is equal to the mechanical workdone
    • D. all of the above
    • Discuss
    • 10. The value of 1 mm of Hg is equal to

    • Options
    • A. 1.333 N/m2
    • B. 13.33 N/m2
    • C. 133.3 N/m2
    • D. 1333 N/m2
    • Discuss


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