Home / Mechanical Engineering / Thermodynamics :: Section 6

Mechanical Engineering :: Thermodynamics

  1. The air standard efficiency of an Otto cycle is given by (where r = Compression ratio, and γ = Ratio of specific heats)

  2. A.

    1 - rγ - 1

    B.

    1 - rγ - 1

    C.

    \(1 - \frac{1}{r^(Y-1)}\)

    D.

    \(1 + \frac{1}{r^(Y-1)}\)

    View Answer

    Workspace

    Discuss Discuss in Forum


  3. In an ideal gas turbine plant, it is assumed that the compression and expansion processes are

  4. A.

    isothermal

    B.

    isentropic

    C.

    polytropic

    D.

    none of these

    View Answer

    Workspace

    Discuss Discuss in Forum


  5. When gas is heated at constant pressure, the heat supplied is utilised in

  6. A.

    increasing the internal energy of gas

    B.

    doing some external work

    C.

    increasing the internal energy of gas and also for doing some external work

    D.

    none of the above

    View Answer

    Workspace

    Discuss Discuss in Forum


  7. The amount of heat required to raise the temperature of 1 kg of water through one Kelvin is called

  8. A.

    specific heat at constant volume

    B.

    specific heat at constant pressure

    C.

    kilo-Joule

    D.

    none of these

    View Answer

    Workspace

    Discuss Discuss in Forum


  9. When wood is heated with a limited supply of air to a temperature not less than 280°C, the resulting fuel is

  10. A.

    coke

    B.

    wood charcoal

    C.

    bituminous coal

    D.

    briquetted coal

    View Answer

    Workspace

    Discuss Discuss in Forum