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Chemical Engineering :: Materials and Construction

  1. For storing water and acid free benzol, use a __________ vessel.

  2. A.
    steel
    B.
    karbate
    C.
    stainless steel
    D.
    none of these

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  3. The chlorinator used in the manufacture of DDT is made of

  4. A.
    glass
    B.
    glass lined steel
    C.
    teflon
    D.
    bakelite

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  5. Reduction in the grain size reduces the __________ of the material.

  6. A.
    fatigue resistance
    B.
    tensile strength
    C.
    creep resistance
    D.
    all (a), (b) & (c)

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  7. Age hardening is concerned with

  8. A.
    copper
    B.
    brass
    C.
    duralumin
    D.
    silver

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  9. Which of the following undergoes granular fracture ?

  10. A.
    Wrought iron
    B.
    Steel
    C.
    Cast iron
    D.
    None of these

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  11. Ball bearings are normally made of __________ steel.

  12. A.
    high speed
    B.
    high carbon
    C.
    chrome
    D.
    silicon

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  13. The electrical conductivity of a __________ decreases with rise in temperature.

  14. A.
    metal/alloy
    B.
    semi-conductor
    C.
    dielectric
    D.
    none of these

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  15. Which one occupies the lowermost position in the electromotive series of metals ?

  16. A.
    Aluminium
    B.
    Noble metals (Ag, Pt, Au)
    C.
    Zinc
    D.
    Alkali metals (K, Na, Li)

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  17. Addition of nickel to copper improves its

  18. A.
    machinability
    B.
    ductility
    C.
    strength
    D.
    hardness

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  19. Presence of even 0.005% of __________ in copper makes it highly brittle, rendering it useless for wire-drawing.

  20. A.
    oxygen
    B.
    arsenic
    C.
    antimony
    D.
    bismuth

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