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  1. The ability of a substance to assume two or more crystalline structure is called

  2. A.
    isomorphism
    B.
    polymorphism
    C.
    amorphism
    D.
    isomerism

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  3. The main function of the deaerator used in the thermal power plant is to

  4. A.
    throttle down the steam pressure.
    B.
    enhance feed water temperature.
    C.
    remove dissolved gases from feed-water.
    D.
    remove non-condensable gases from condenser.

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  5. Lubricants can be used to

  6. A.
    transmit power hydraulically.
    B.
    form a seal in compressors.
    C.
    remove contaminants by flushing and to insulate transformers, switchgears etc.
    D.
    all (a), (b) & (c).

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  7. Which of the following is termed as the boiler mounting ?

  8. A.
    Feed water pump
    B.
    Steam superheater
    C.
    Blow off cock
    D.
    Economiser

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  9. Paint spray gun works on the principle of

  10. A.
    Bernoulli's theorem.
    B.
    Boyle's law.
    C.
    Newton's law of viscosity.
    D.
    none of these.

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  11. Gas carrying pipelines are best joined by

  12. A.
    nuts & bolts
    B.
    rivetting
    C.
    welding
    D.
    none of these

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  13. Scab is a defect developed during __________ of metals.

  14. A.
    forging
    B.
    sand casting
    C.
    machining
    D.
    welding

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  15. Pick out the wrong statement about powder metallurgy technique.

  16. A.
    Powder metallurgy techniques are applied at room temperature.
    B.
    Final product in powder metallurgy is not necessarily metallic powder.
    C.
    The final product in powder metallurgy is made from metallic powder.
    D.
    Silver and nickel when melted together do not mix to form an alloy ; however alloy of these constituents can be made by powder metallurgy technique.

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  17. A floating body oscillates about its __________ when it is displaced slightly.

  18. A.
    centre of gravity
    B.
    metacentre
    C.
    centre of buoyancy
    D.
    centre of pressure

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  19. Which of the following relatively employs the highest heat transfer surface area in a high pressure boiler ?

  20. A.
    Airpreheater
    B.
    Economiser
    C.
    Steam superheater
    D.
    Furnace water wall

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