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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

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

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

  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)

  7. Age hardening is concerned with

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

  9. Which of the following undergoes granular fracture ?

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

  11. Ball bearings are normally made of __________ steel.

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

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

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

  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)

  17. Addition of nickel to copper improves its

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

  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