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Chemical Engineering :: Materials and Construction

  1. Carbon is present in the combined form (carbide) in case of

  2. A.
    pig iron
    B.
    steel
    C.
    ferroalloys
    D.
    all (a), (b) & (c)

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  3. Chilled iron castings are

  4. A.
    easily machinable
    B.
    soft on surface
    C.
    highly wear resistant
    D.
    none of these

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  5. A hardness depth of about 3 mm can be achieved by induction hardness in __________ seconds.

  6. A.
    5
    B.
    100
    C.
    250
    D.
    500

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  7. Presence of nitrogen in steel

  8. A.
    makes it brittle.
    B.
    increases its strength.
    C.
    increases its hardness.
    D.
    is desirable.

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  9. Very high sulphur in pig iron makes

  10. A.
    its casting unsound.
    B.
    its hard and machinable.
    C.
    its brittle and malleable.
    D.
    all (a), (b) & (c)

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  11. Amount of energy that a material can absorb before its fracture is a measure of its

  12. A.
    toughness
    B.
    resilience
    C.
    malleability
    D.
    ductility

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  13. Anodic material used for the cathodic protection of underground buried steel pipeline is

  14. A.
    nickel or copper
    B.
    zinc or magnesium
    C.
    bronze
    D.
    brass

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  15. Bush bearings are made of

  16. A.
    mild steel
    B.
    phosphorous bronze
    C.
    white metal alloys
    D.
    none of these

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  17. Alinco, which is a aluminium-cobalt-nickel steel, is used for making

  18. A.
    surgical instruments
    B.
    powerful magnets
    C.
    chemical equipments
    D.
    boiler tubes

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  19. Slow plastic deformation of metals under a constant stress is termed as __________ failure.

  20. A.
    fatigue
    B.
    endurance
    C.
    creep
    D.
    none of these

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