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  1. Fibrous fracture is normally encountered in the __________ materials.

  2. A.
    hard
    B.
    elastic
    C.
    ductile
    D.
    brittle

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  3. Bad odour in sanitary latrines is reduced by periodically sprinkling

  4. A.
    bleaching powder.
    B.
    lime powder.
    C.
    aluminium sulphate.
    D.
    none of these.

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  5. __________ has the highest melting point out of the following.

  6. A.
    Tungsten
    B.
    Zirconium
    C.
    Molybdenum
    D.
    Tantalum

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  7. The only suitable method for hardening the low carbon steel is case hardening. Which of the following is a case hardening process?

  8. A.
    Cyaniding
    B.
    Sheardising
    C.
    Spherodising
    D.
    None of these

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  9. Annealing of cast iron

  10. A.
    softens it to facilitate machining.
    B.
    decreases the free carbon.
    C.
    increases the strength.
    D.
    none of these.

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  11. Coating thickness in case of galvanising of steel sheet generally corresponds to the deposition of __________ gms of zinc per m2 of steel strip.

  12. A.
    5-10
    B.
    1000-1500
    C.
    120-500
    D.
    1500-3000

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  13. Chlorine acts as a bleaching agent only in the presence of

  14. A.
    dry air
    B.
    pure oxygen
    C.
    moisture
    D.
    sunlight

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  15. Corona discharge is related to the operation of a/an

  16. A.
    induction motor.
    B.
    electrostatic precipitator.
    C.
    fast breeder reactor.
    D.
    magneto hydrodynamic generator (MHD).

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  17. Plastics as a material of construction suffer from the drawback of low

  18. A.
    machinability
    B.
    density
    C.
    strength
    D.
    plastic deformation

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  19. Out of the following, the best material capable of withstanding shock & vibration without the danger of cracking is

  20. A.
    malleable iron
    B.
    grey cast iron
    C.
    chilled cast iron
    D.
    white cast iron

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