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Home Mechanical Engineering Thermodynamics Comments

  • Question
  • Which of the following gas is mostly used in town for street and domestic lighting and heating?


  • Options
  • A. Producer gas
  • B. Coal gas
  • C. Mond gas
  • D. Coke oven gas

  • Correct Answer
  • Coal gas 


  • Thermodynamics problems


    Search Results


    • 1. The value of gas constant (R) in S. I. units is

    • Options
    • A. 0.287 J/kgK
    • B. 2.87 J/kgK
    • C. 28.7 J/kgK
    • D. 287 J/kgK
    • Discuss
    • 2. Water gas is obtained by passing air and a large amount of steam over waste coal at about 650°C.

    • Options
    • A. Correct
    • B. Incorrect
    • Discuss
    • 3. A series of operations, which takes place in a certain order and restore the initial conditions at the end, is known as

    • Options
    • A. reversible cycle
    • B. irreversible cycle
    • C. thermodynamic cycle
    • D. none of these
    • Discuss
    • 4. The most probable velocity of the gas molecules is given by

    • Options
    • A.
    • B.
    • C.
    • D.
    • Discuss
    • 5. Stirling and Ericsson cycles are

    • Options
    • A. reversible cycles
    • B. irreversible cycles
    • C. semi-reversible cycles
    • D. quasi-static cycles
    • Discuss
    • 6. The absolute zero temperature is taken as

    • Options
    • A. -273°C
    • B. 273°C
    • C. 237°F
    • D. -237°F
    • Discuss
    • 7. The specific heat of water is

    • Options
    • A. 1.817
    • B. 2512
    • C. 4.187
    • D. none of these
    • Discuss
    • 8. The distillation carried out in such a way that the liquid with the lowest boiling point is first evaporated and recondensed, then the liquid with the next higher boiling point is then evaporated and recondensed, and so on until all the available liquid fuels are separately recovered in the sequence of their boiling points. Such a process is called

    • Options
    • A. cracking
    • B. carbonisation
    • C. fractional distillation
    • D. full distillation
    • Discuss
    • 9. Which of the following statement is incorrect?

    • Options
    • A. The liquid fuels consist of hydrocarbons.
    • B. The liquid fuels have higher calorific value than solid fuels.
    • C. The solid fuels have higher calorific value than liquid fuels.
    • D. A good fuel should have low ignition point.
    • Discuss
    • 10. Which of the following is correct?

    • Options
    • A. Absolute pressure = Gauge pressure + Atmospheric pressure
    • B. Gauge pressure = Absolute pressure + Atmospheric pressure
    • C. Atmospheric pressure = Absolute pressure + Gauge pressure
    • D. Absolute pressure = Gauge pressure - Atmospheric pressure
    • Discuss


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