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Chemical Engineering :: Materials and Construction

Materials and Construction - Section 1
Materials and Construction - Section 2
Materials and Construction - Section 3
Materials and Construction - Section 4
Materials and Construction - Section 5
Materials and Construction - Section 6
Materials and Construction - Section 7
Materials and Construction - Section 8
Materials and Construction - Section 9
Materials and Construction - Section 10
Materials and Construction - Section 11

  1. Corrosion resisting properties of cast iron are significantly improved by the addition of 12 - 15% of

    2. A.
    tungsten
    B.
    vanadium
    C.
    silicon
    D.
    all (a), (b) & (c)

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  2. Pick out the wrong statement

    3. A.
    Hardening makes the steel more brittle.
    B.
    High alloy steels contain more than 50% alloying element.
    C.
    18/8 stainless steel is a magnetic steel.
    D.
    both (b) and (c)

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  3. Duriron is

    4. A.
    acid resistant, brittle and very hard.
    B.
    high silicon iron.
    C.
    prone to breakage due to thermal expansion because of its very high co-efficient of thermal expansion.
    D.
    all (a), (b) and (c).

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  4. Pick out the correct statement.

    5. A.
    Stainless steel is nothing but chromium coated steel.
    B.
    Hardening of a soft metal can be done by alloying it with another metal or non-metal.
    C.
    Plastic deformation of a material is its temporary distortion under the action of applied stress.
    D.
    Rusting of iron is not electrochemical in nature.

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  5. Cast iron detachable joint is used in __________ pipes.

    6. A.
    steel
    B.
    cast iron
    C.
    asbestos cement
    D.
    reinforced cement concrete

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  6. Tin coating on metals is not done by

    7. A.
    spraying
    B.
    powder metallurgy
    C.
    hot dipping
    D.
    electro-deposition

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  7. The softest material just next to talc in the Mho's scale is

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

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  8. 18/8 stainless steel means, that it contains

    9. A.
    18% chromium and 8% nickel.
    B.
    18% chromium and 8% molybdenum.
    C.
    18% nickel and 8% chromium.
    D.
    18% molybdenum and 8% chromium.

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  9. Glass is corroded by

    10. A.
    fluorine (dry or wet)
    B.
    sulphuric acid
    C.
    phosphoric acid
    D.
    none of these

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  10. Iron alloyed with carbon upto 2% is called

    11. A.
    pig iron
    B.
    wrought iron
    C.
    high carbon steel
    D.
    none of these

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