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  1. Blast furnace slag is mainly molten

  2. A.
    sand
    B.
    magnesium silicate
    C.
    calcium silicate
    D.
    iron pyrite

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  3. A jet engine turbine blade is normally manufactured by

  4. A.
    forging.
    B.
    shell moulding.
    C.
    investment casting.
    D.
    pressure die casting.

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  5. Stainless steel is welded using

  6. A.
    oxy-acetylene flame.
    B.
    oxy-hydrogen flame.
    C.
    arc welding.
    D.
    inert gas arc welding.

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  7. The cooling rate required to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours is __________ BTU/hr.

  8. A.
    100
    B.
    200
    C.
    1000
    D.
    2000

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  9. The phenomenon occurring during explosion of a hydrogen bomb is

  10. A.
    nuclear fission.
    B.
    nuclear fusion.
    C.
    a combination of both nuclear fission & fusion.
    D.
    none of these.

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  11. Square steel key is normally strong in failure by shear & crushing. Keys are normally made of __________ steel bars.

  12. A.
    hot rolled mild
    B.
    cold rolled mild
    C.
    forged
    D.
    machinable stainless

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  13. Nitriding of a steel part does not increase its

  14. A.
    grain size.
    B.
    fatigue limit.
    C.
    surface hardness.
    D.
    wear resistance.

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  15. __________ of grey cast iron produces white cast iron.

  16. A.
    Tempering
    B.
    Rapid heating
    C.
    Rapid cooling
    D.
    Slow cooling

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  17. As the fluid flow rate increases, the float of the rotameter

  18. A.
    rises in the tube.
    B.
    rotates at higher speed.
    C.
    rotates at lower speed.
    D.
    drops down in the tube.

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