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Mechanical Engineering :: Steam Boilers and Engines

  1. Which of the following are boiler accessories ?

  2. A.

    economiser

    B.

    superheater

    C.

    both (a) and (b)

    D.

    none of these


  3. The high pressure and low pressure cylinders in a Woolf type compound engine are regarded as having cranks

  4. A.

    180° to each other

    B.

    90° to each other

    C.

    0° to each other

    D.

    none of these


  5. The amount of water evaporated in kg per kg of fuel burnt is called

  6. A.

    evaporative capacity of a boiler

    B.

    equivalent evaporation from and at 100° C

    C.

    boiler efficiency

    D.

    none of these


  7. In a single acting steam engine

  8. A.

    the steam is admitted on one side of the piston and one working stroke is produced during each revolution of the crankshaft

    B.

    the steam is admitted, in turn, on both sides of the piston and one working stroke is produced during each revolution of the crankshaft

    C.

    the steam is admitted on one side of the piston and two working strokes are produced during each revolution of the crankshaft

    D.

    the steam is admitted, in turn, on both sides of the piston and two working strokes are produced during each revolution of the crankshaft.


  9. The cylindrical shell of a Lancashire boiler has diameter from

  10. A.

    1 to 2 m

    B.

    1.25 to 2.25 m

    C.

    1.5 to 2.5 m

    D.

    1.75 to 2.75 m