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Home Mechanical Engineering Thermodynamics Comments

  • Question
  • All the commercial liquid fuels are derived from natural petroleum (or crude oil).


  • Options
  • A. True
  • B. False

  • Correct Answer
  • True 


  • Thermodynamics problems


    Search Results


    • 1. There is a loss of heat in an irreversible process.

    • Options
    • A. True
    • B. False
    • Discuss
    • 2. According to Gay-Lussac law for a perfect gas, p/T = constant, if v is kept constant.

    • Options
    • A. True
    • B. False
    • Discuss
    • 3. A cycle consisting of one constant pressure, one constant volume and two isentropic processes is known as

    • Options
    • A. Carnot cycle
    • B. Stirling cycle
    • C. Otto cycle
    • D. Diesel cycle
    • Discuss
    • 4. The value of specific heat at constant pressure (cp) is __________ that of at constant volume (cv).

    • Options
    • A. less than
    • B. equal to
    • C. more than
    • Discuss
    • 5. In the first law of thermodynamics, the total energy of the system remains constant.

    • Options
    • A. True
    • B. False
    • Discuss
    • 6. When cut-off ratio is __________ the efficiency of Diesel cycle approaches to Otto cycle efficiency.

    • Options
    • A. zero
    • B. 1/5
    • C. 4/5
    • D. 1
    • Discuss
    • 7. The efficiency and work ratio of a simple gas turbine cycle are

    • Options
    • A. low
    • B. very low
    • C. high
    • D. very high
    • Discuss
    • 8. The processes occuring in open system which permit the transfer of mass to and from the system, are known as

    • Options
    • A. flow processes
    • B. non-flow processes
    • C. adiabatic processes
    • D. none of these
    • Discuss
    • 9. The ratio of specific heat at constant pressure (cp) and specific heat at constant volume (cv) is

    • Options
    • A. equal to one
    • B. less than one
    • C. greater than one
    • D. none of these
    • Discuss
    • 10. The universal gas constant of a gas is the product of molecular mass of the gas and the gas constant.

    • Options
    • A. Correct
    • B. Incorrect
    • Discuss


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