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Mechanical Engineering :: Steam Boilers and Engines

  1. In a steam condenser, the partial pressure of steam and air are 0.06 bar and 0.007 bar respectively. The condenser pressure is

  2. A.

    0.007 bar

    B.

    0.053 bar

    C.

    0.06 bar

    D.

    0.067 bar

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  3. The ratio of the energy required to produce the artificial draught (expressed in metres head or J/kg of flue gas) to the mechanical equivalent of extra heat carried away per kg of flue gases due to natural draught, is known as

  4. A.

    efficiency of the boiler

    B.

    efficiency of the chimney

    C.

    efficiency of the fan

    D.

    power of the boiler

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  5. The function of a piston in a steam engine is

  6. A.

    to guide motion of the piston rod and to prevent it from bending

    B.

    to transfer motion from the piston to the cross-head

    C.

    to convert heat energy of the steam into mechanical work id) to exhaust steam from the cylinder at proper moment

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  7. The high steam and low water safety valve is not used in

  8. A.

    Cochran boiler

    B.

    Cornish boiler

    C.

    Lancashire boiler

    D.

    Locomotive boiler

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  9. In a Woolf type compound engine, the high pressure and low pressure cylinders

  10. A.

    have common piston rod

    B.

    are set at 90°

    C.

    have separate piston rod

    D.

    are set in V - arrangement

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