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Mechanical Engineering :: Steam Boilers and Engines

  1. A compound steam engine in which piston rods of high pressure and low pressure cylinders are attached to two different cranks set at 90° to each other, is called

  2. A.

    receiver type compound engine

    B.

    Tandem type compound engine

    C.

    Woolf type compound engine

    D.

    both (a) and (b)


  3. When the circulation of water, in a boiler, is by convection currents which are set up during the heating of water, then the boiler is known as

  4. A.

    internally fired boiler

    B.

    externally fired boiler

    C.

    natural circulation boiler

    D.

    forced circulation boiler


  5. The ratio of heat equivalent to brake power to the energy supplied in steam is known as

  6. A.

    mechanical efficiency

    B.

    overall efficiency

    C.

    indicated thermal efficiency

    D.

    brake thermal efficiency


  7. When the speed of the engine is controlled by means of a valve in a steam pipe, which regulates the pressure of steam entering the engine, then the governing is known as

  8. A.

    throttle governing

    B.

    cut-off governing

    C.

    by-pass governing

    D.

    none of these


  9. The length of Lancashire boiler varies from

  10. A.

    5 to 6 m

    B.

    6 to 7 m

    C.

    7.25 to 9 m

    D.

    9 to 10 m