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Chemical Engineering Basics - Section 1
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Chemical Engineering Basics - Section 6
Chemical Engineering Basics - Section 7
Chemical Engineering Basics - Section 8
Chemical Engineering Basics - Section 9
Chemical Engineering Basics - Section 10
Chemical Engineering Basics - Section 11
Chemical Engineering Basics - Section 12
Chemical Engineering Basics - Section 13
Chemical Engineering Basics - Section 14
Chemical Engineering Basics - Section 15
Chemical Engineering Basics - Section 16
Chemical Engineering Basics - Section 17
Chemical Engineering Basics - Section 18
Chemical Engineering Basics - Section 19
Chemical Engineering Basics - Section 20
Chemical Engineering Basics - Section 21
Chemical Engineering Basics - Section 22
Chemical Engineering Basics - Section 23
Chemical Engineering Basics - Section 24
Chemical Engineering Basics - Section 25
Chemical Engineering Basics - Section 26
Chemical Engineering Basics - Section 27
Chemical Engineering Basics - Section 28

  1. A thermally thin body is the one for which

    2. A.
    Biot number is less than 0.1.
    B.
    Gallileo number is less than 0.1.
    C.
    Fourier number is less than 0.1.
    D.
    Fourier number is greater than 0.1.

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  2. Air refrigeration cycle is used in the air crafts, because of

    3. A.
    low temperature encountered at high altitude.
    B.
    its high heat transfer rate.
    C.
    its low unit weight per ton of refrigeration.
    D.
    its higher co-efficient of performance (COP).

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  3. Failure of a material is attributed to __________ if it fails below its yield point.

    4. A.
    impact loading
    B.
    fatigue
    C.
    creep
    D.
    straining

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  4. Protection of ship hulls against sea water corrosion is done by coating with zinc because of the fact that zinc compared to iron is

    5. A.
    reduced preferentially.
    B.
    cheaper.
    C.
    oxidised preferentially.
    D.
    lighter.

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  5. Which of the following pairs regarding the effect of alloying elements in steels are not matched correctly ?

    6. A.
    Cobalt: It contributes to rerl hardness by hardening ferrite.
    B.
    Molybdenum: It forms abrasion resisting particles.
    C.
    Phosphorous: It improves machinability in free cutting steels.
    D.
    Silicon: It reduces oxidation resistance.

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  6. The phenomenon of strain-ageing is generally experienced with

    7. A.
    cast iron.
    B.
    low carbon steel.
    C.
    high manganese steel.
    D.
    high carbon steel.

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  7. The capacity of a material to absorb energy depends upon both its strength & stiffness. The term 'stiffness' of a material is the opposite of its

    8. A.
    flexibility
    B.
    plasticity
    C.
    hardness
    D.
    hardenability

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  8. Filler metal is not used in the __________ welding.

    9. A.
    seam
    B.
    electric spot
    C.
    projection
    D.
    all a, b & c

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  9. The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume : Cp of copper is 23 J K-1mole-1)

    10. A.
    2300 J
    B.
    4600 J
    C.
    230 J
    D.
    2.3 x 106 J

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  10. Sudden immersion/dipping of red hot steel bar in water makes it

    11. A.
    malleable & tough.
    B.
    ductile & soft.
    C.
    brittle & hard.
    D.
    none of these.

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