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Chemical Engineering Basics-2 - Section-1
  1. Cast iron compared to steel is better in

    2. A.

     Ductility
    B.

     Strength
    C.

     Malleability
    D.

     Fluidity & castability

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  2. With increase in temperature, the electrical conductivity of semiconductors

    3. A.

     Increases
    B.

     Decreases
    C.

     Remain constant
    D.

     Either A or B, depends on the type of semi-conductor

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  3. Constituents of stellite are

    4. A.

     Zinc, copper & nickel
    B.

     Cobalt, chromium & tungsten
    C.

     Zinc, aluminium & nickel
    D.

     Nickel, cobalt & vanadium

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  4. __________ is not used as a material of construction in thermocouples.

    5. A.

     Alumel
    B.

     Rhodium
    C.

     Constantan
    D.

     Duralumin

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  5. Ganister contains maximum percentage of

    6. A.

     FeO
    B.

     SiO₂
    C.

     MgO
    D.

     MnO₂

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  6. In BOF, desiliconisation is a first order reaction. So the silicon content of the metal decreases

    7. A.

     Linearly with time
    B.

     Exponentially with time
    C.

     Logarithmically with time
    D.

     In proportion to the square root of time

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  7. Corrosion is

    8. A.

     A physical phenomenon
    B.

     A chemical phenomenon
    C.

     Same as erosion
    D.

     An uncontrollable phenomenon

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  8. Aromatics are desired constituents of

    9. A.

     Lubricating oil
    B.

     Diesel
    C.

     Kerosene
    D.

     Petrol

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  9. The product out from a cupola is called

    10. A.

     Wrought iron
    B.

     Pig iron
    C.

     Cast iron
    D.

     None of these

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  10. The product out from a cupola is called

    11. A.

     Wrought iron
    B.

     Pig iron
    C.

     Cast iron
    D.

     None of these

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