Menu
Home / Mechanical Engineering / Thermodynamics :: section-8

Mechanical Engineering :: Thermodynamics

Thermodynamics - Section 1
Thermodynamics - Section 2
Thermodynamics - Section 3
Thermodynamics - Section 4
Thermodynamics - Section 5
Thermodynamics - Section 6
Thermodynamics - Section 7
Thermodynamics - section-8
  1. The value of 1 mm of Hg is equal to

    2. A.

     1.333 N/m2
    B.

     13.33 N/m2
    C.

     133.3 N/m2
    D.

     1333 N/m2

    View Answer

    Workspace

    Discuss Discuss in Forum

  2. The efficiency of Joule cycle is

    3. A.

     Less than Carnot cycle
    B.

     Equal to Carnot cycle
    C.

     Greater than Carnot cycle
    D.

     None of these

    View Answer

    Workspace

    Discuss Discuss in Forum

  3. A mixture of gas expands from 0.03 m3 to 0.06 m3 at a constant pressure of 1 MPa and absorbs 84 kJ of heat during the process. The change in internal energy of the mixture is

    4. A.

     30 kJ
    B.

     84 kJ
    C.

     54 kJ
    D.

     114 kJ

    View Answer

    Workspace

    Discuss Discuss in Forum

  4. Zeroth law of thermodynamics

    5. A.

     Deals with conversion of mass and energy
    B.

     Deals with reversibility and irreversibility of process
    C.

     States that if two systems are both in equilibrium with a third system, they are in thermal equilibrium with each other
    D.

     Deals with heat engines

    View Answer

    Workspace

    Discuss Discuss in Forum

  5. First law of thermodynamics

    6. A.

     Enables to determine change in internal energy of the system
    B.

     Does not enable to determine change in entropy
    C.

     Provides relationship between heat, work and internal energy
    D.

     All of the above

    View Answer

    Workspace

    Discuss Discuss in Forum

  6. According to first law of thermodynamics

    7. A.

     Work done by a system is equal to heat transferred by the system
    B.

     Total internal energy of a system during a process remains constant
    C.

     Internal energy, enthalpy and entropy during a process remain constant
    D.

     Total energy of a system remains constant

    View Answer

    Workspace

    Discuss Discuss in Forum

  7. According to Clausius statement of second law of thermodynamics

    8. A.

     Heat can
    B.

     Heat can be transferred for low temperature to high temperature source by using refrigeration cycle
    C.

     Heat can be transferred from low temperature to high temperature source if COP of process is more than unity
    D.

     Heat can

    View Answer

    Workspace

    Discuss Discuss in Forum

  8. The statement that molecular weights of all gases occupy the same volume is known as

    9. A.

     Avogadro's hypothesis
    B.

     Dalton's law
    C.

     Gas law
    D.

     Law of thermodynamics

    View Answer

    Workspace

    Discuss Discuss in Forum

  9. In a no flow reversible process for which p = (-3V + 15) × 105 N/m², V changes from 1 m3 to 2 m3. The work done will be about

    10. A.

     100 × 10⁵ joules
    B.

     1 × 10⁵ joules
    C.

     10 × 10⁵ joules
    D.

     10 × 10⁵ kilo joules

    View Answer

    Workspace

    Discuss Discuss in Forum

  10. The ratio of molar specific heats for mono-atomic gas is

    11. A.

     1
    B.

     1.4
    C.

     1.67
    D.

     1.87

    View Answer

    Workspace

    Discuss Discuss in Forum

Java Programming Questions and Answers Interview Questions and Answers