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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. Failure of a material is termed as fatigue failure, if it fails below the yield point. The resistance to fatigue failure of a material is measured by the

    2. A.
    ultimate tensile strength (U.T.S.)
    B.
    endurance limit
    C.
    elastic limit
    D.
    none of these

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  2. Bog iron used for the adsorption of H2S from coke oven gas is

    3. A.
    an intimate mixture of saw dust and iron dust (i.e. moist ferric hydroxide).
    B.
    iron impregnated with resin (usually bakelite).
    C.
    carbon free iron.
    D.
    none of these.

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  3. Wrought iron is a suitable material of construction for handling __________ solutions.

    4. A.
    dilute acidic
    B.
    concentrated acidic
    C.
    alkalis & alkaline
    D.
    none of these

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  4. Steel rods are used in reinforced concrete to increase its __________ strength.

    5. A.
    shear
    B.
    tensile
    C.
    compressive
    D.
    none of these

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  5. Corrosion involves exchange of electrons in __________ corrosion.

    6. A.
    chemical
    B.
    electrochemical
    C.
    both (a) & (b)
    D.
    neither (a) nor (b)

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  6. Straight silicon steel (containing Si from 0.5 to 5%) because of their low hysterisis loss and high magnetic permeability are used for electrical appliances. Which of the following electrical appliances made of silicon steel contains maximum percentage of silicon (about 4%) ?

    7. A.
    Armature of small motors/generators.
    B.
    Generators and small motors.
    C.
    Induction motors.
    D.
    High frequency transformers.

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  7. Which of the following has the least value of ultimate tensile strength (UTS) ?

    8. A.
    Medium carbon steel
    B.
    High carbon steel
    C.
    Cast iron
    D.
    Wrought iron

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  8. __________ does not contain tin as an alloying material.

    9. A.
    Brass
    B.
    Pewter
    C.
    Solder
    D.
    Babbit metal

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  9. A metallic alloy in general as compared to their pure metal components is

    10. A.
    more corrosion resistant.
    B.
    having higher melting point.
    C.
    having lower hardness, reactivity and fusibility.
    D.
    having lower electrical conductivity.

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  10. Pick out the wrong statement.

    11. A.
    Wrought iron contains about 0.02% carbon.
    B.
    Wrought iron can not be easily forged and welded.
    C.
    The chilled cast iron does not contain graphite.
    D.
    Spheroidal grey cast iron contains graphite flakes.

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