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Mechanical Engineering :: Thermodynamics

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Thermodynamics - Section 3
Thermodynamics - Section 4
Thermodynamics - Section 5
Thermodynamics - Section 6
Thermodynamics - Section 7
Thermodynamics - section-8
  1. The main cause for the irreversibility is

    2. A.

     Unrestricted expansion
    B.

     Mechanical and fluid friction
    C.

     Heat transfer with a finite temperature difference
    D.

     All of the above

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  2. The isothermal and adiabatic processes are regarded as

    3. A.

     Reversible process
    B.

     Irreversible process
    C.

     Reversible or irreversible process
    D.

     None of these

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  3. An adiabatic process is one in which

    4. A.

     The temperature of the gas changes
    B.

     No heat enters or leaves the gas
    C.

     The change in internal energy is equal to the mechanical work done
    D.

     All of the above

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  4. Isochoric process is one in which

    5. A.

     Free expansion takes place
    B.

     Very little mechanical work is done by the system
    C.

     No mechanical work is done by the system
    D.

     All parameters remain constant

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  5. Kelvin Planck's law deals with

    6. A.

     Conservation of heat
    B.

     Conservation of work
    C.

     Conversion of heat into work
    D.

     Conversion of work into heat

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  6. Kelvin-Planck's law deals with

    7. A.

     Conservation of work
    B.

     Conservation of heat
    C.

     Conversion of heat into work
    D.

     Conversion of work into heat

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  7. The total energy of a molecule is shared equally by the various degrees of freedom possessed by it. This law is known as

    8. A.

     Law of equipartition of energy
    B.

     Law of degradation of energy
    C.

     Law of conservation of energy
    D.

     None of these

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  8. Intensive property of a system is one whose value

    9. A.

     Depends on the mass of the system, like volume
    B.

     Does not depend on the mass of the system, like temperature, pressure, etc.
    C.

     Is not dependent on the path followed but on the state
    D.

     Is dependent on the path followed and not on the state

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  9. Extensive property of a system is one whose value

    10. A.

     Depends on the mass of the system like volume
    B.

     Does not depend on the mass of the system, like temperature, pressure, etc.
    C.

     Is not dependent on the path followed but on the state
    D.

     Is dependent on the path followed and not on the state

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  10. Temperature of a gas is produced due to

    11. A.

     Its heating value
    B.

     Kinetic energy of molecules
    C.

     Repulsion of molecules
    D.

     Surface tension of molecules

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