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Chemical Engineering :: Materials and Construction

  1. Hydrochloric acid is __________ corrosive to common metals.

  2. A.
    least
    B.
    not
    C.
    mildly
    D.
    highly

  3. Tank furnace used for melting of glass is made of

  4. A.
    mild steel
    B.
    cast iron
    C.
    refractory blocks
    D.
    stainless steel

  5. Spray dryer for evaporating milk to produce milk powder is made of

  6. A.
    lead lined steel
    B.
    stainless steel
    C.
    aluminium
    D.
    cast iron

  7. Chromel (Nichrome) is an alloy of

  8. A.
    chromium and molybdenum.
    B.
    nickel and chromium.
    C.
    molybdenum and nickel.
    D.
    chromium and aluminium.

  9. Which of the following is not an alloy of nickel and chromium ?

  10. A.
    Inconel
    B.
    Hastealloy
    C.
    Nimonic alloys
    D.
    Duralumin

  11. Thermoplastic resins are those polymers, which

  12. A.
    has decreased plasticity at increasing temperature.
    B.
    can not be moulded.
    C.
    easily deform under pressure at high temperature.
    D.
    none of these.

  13. The temperature at which new grains are formed in the metal is called the __________ temperature.

  14. A.
    eutectic
    B.
    recrystallisation
    C.
    upper critical
    D.
    lower critical

  15. Molten phthalic anhydride is stored in a/an __________ vessel.

  16. A.
    aluminium
    B.
    nickel clad steel
    C.
    lead lined steel
    D.
    glass lined steel.

  17. Fatigue failure of a material results from __________ stress.

  18. A.
    tensile
    B.
    compressive
    C.
    fluctuating
    D.
    none of these.

  19. Fermenter used in the production of pen-cillin by deep fermentation proces is a __________ lined steel vessel

  20. A.
    rubber
    B.
    monel
    C.
    glass
    D.
    nickel