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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.

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

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

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

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

  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

  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

  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

  13. Presence of high phosphorous in cast iron increases its

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

  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

  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

  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