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Chemical Engineering :: Materials and Construction

  1. __________ is never shipped in glass carboys.

  2. A.
    Ammonia
    B.
    Acetic acid
    C.
    Phenol
    D.
    Formaldehyde

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  3. Lead is

  4. A.
    not resistant to corrosion.
    B.
    used as a cathodic material.
    C.
    not used as pigment (in its compound forms) for paints.
    D.
    used as a shock absorber (in mattress form) between the foundation and steel framework of skyscrapper buildings.

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  5. Nitriding of steel is done (in electric furnace) at __________ °C.

  6. A.
    510
    B.
    1720
    C.
    2210
    D.
    910

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  7. Addition of 2% nickel in steel makes it suitable for making

  8. A.
    electronic valves
    B.
    boiler plates, rivets etc.
    C.
    turbine blades
    D.
    connecting rod

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  9. The softest material just next to talc in the Mhos scale is

  10. A.
    quartz
    B.
    gypsum
    C.
    feldspar
    D.
    fluorite

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  11. Fatigue strength of a material increases by

  12. A.
    having notches in the specimen
    B.
    rise in temperature
    C.
    under stressing the specimen
    D.
    having scratches on the surface

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  13. Specify the material of construction suitable for handling concentrated HNO3 at 100°C.

  14. A.
    High silicon iron, Kel-F and teflon
    B.
    Tin and wood
    C.
    Silicone rubber
    D.
    Stainless steel

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  15. Aluminium storage vessel can be used to store

  16. A.
    aqua regia
    B.
    ferrous sulphate
    C.
    hydrochloric acid (10%)
    D.
    none of these

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  17. Silicone rubber is not resistant to the corrosive action of

  18. A.
    sulphuric acid (10%)
    B.
    sulphuric acid (95%)
    C.
    ether
    D.
    both (b) and (c)

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  19. Which metal is protected by the layer of its own oxide ?

  20. A.
    Iron
    B.
    Silver
    C.
    Calcium
    D.
    Aluminium

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