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Chemical Engineering :: Materials and Construction

  1. Sheardising process is used for

  2. A.
    surface coating.
    B.
    heat treatment of high speed steel.
    C.
    cold working on metals.
    D.
    none of these.

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  3. The maximum percentage of chromium that can be added to steel is about

  4. A.
    12
    B.
    18
    C.
    24
    D.
    30

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  5. Which of the following is a non-magnetic material ?

  6. A.
    Cobalt
    B.
    Zinc
    C.
    Nickel
    D.
    None of these

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  7. An alloy used as thermocouple material comprises of 40% nickel and 60% copper. It is called

  8. A.
    constantan
    B.
    kanthal
    C.
    chromel
    D.
    German silver

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  9. The material of construction of pressure mills used for squeezing out the juice from sugar cane is

  10. A.
    stainless steel
    B.
    cast iron
    C.
    mild steel
    D.
    monel

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  11. Rotary driers are generally made of

  12. A.
    cast iron
    B.
    mild steel
    C.
    high silicon iron (14% Si)
    D.
    tin lined with refractory bricks

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  13. Presence of high phosphorous in cast iron increases its

  14. A.
    fluidity
    B.
    melting point
    C.
    shrinkage
    D.
    tensile strength

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  15. The phenomenon in which slow extension of material takes place with the time at constant load is called

  16. A.
    plasticity
    B.
    creep
    C.
    elasticity
    D.
    ductility

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  17. A material capable of undergoing large permanent deformation, when subjected to compression is termed as

  18. A.
    malleable
    B.
    ductile
    C.
    brittle
    D.
    none of these

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  19. __________ is used for examining the macro-structure of a material.

  20. A.
    Metallurgical microscope
    B.
    Optical microscope
    C.
    X-rays
    D.
    Visual inspection by naked eye

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