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Home Mechanical Engineering Thermodynamics Comments

  • Question
  • The amount of heat required to raise the temperature of the unit mass of gas through one degree at constant volume, is called


  • Options
  • A. specific heat at constant volume
  • B. specific heat at constant pressure
  • C. kilo Joule
  • D. none of these

  • Correct Answer
  • specific heat at constant volume 


  • Thermodynamics problems


    Search Results


    • 1. The behaviour of a perfect gas, undergoing any change in the variables which control physical properties, is governed by

    • Options
    • A. Boyle's law
    • B. Charles' law
    • C. Gay-Lussac law
    • D. all of these
    • Discuss
    • 2. One kg of carbon requires 4/3 kg of oxygen and produces __________ kg of carbon monoxide gas.

    • Options
    • A. 8/3
    • B. 11/3
    • C. 11/7
    • D. 7/3
    • Discuss
    • 3. The efficiency of Diesel cycle increases with

    • Options
    • A. decrease in cut-off
    • B. increase in cut-off
    • C. constant cut-off
    • D. none of these
    • Discuss
    • 4. If the value of n = 0 in the equation pvn = C, then the process is called

    • Options
    • A. constant volume process
    • B. adiabatic process
    • C. constant pressure process
    • D. isothermal process
    • Discuss
    • 5. The compression ratio for petrol engines is

    • Options
    • A. 3 to 6
    • B. 5 to 8
    • C. 15 to 20
    • D. 20 to 30
    • Discuss
    • 6. Stirling and Ericsson cycles are

    • Options
    • A. reversible cycles
    • B. irreversible cycles
    • C. semi-reversible cycles
    • D. quasi-static cycles
    • Discuss
    • 7. The most probable velocity of the gas molecules is given by

    • Options
    • A.
    • B.
    • C.
    • D.
    • Discuss
    • 8. 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
    • 9. 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
    • 10. 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


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