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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)

  3. Chilled iron castings are

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

  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

  7. Presence of nitrogen in steel

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

  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)

  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

  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

  15. Bush bearings are made of

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

  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

  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