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  • Question
  • In the blast furnace, incorporation of water vapour in the blast gives the following effect.


  • Options
  • A. Increases the reducing potential of the gas.
  • B. Increases the flame temperature.
  • C. No significant change occurs.
  • D. Increases the hydrogen content in the metal.

  • Correct Answer
  • Increases the reducing potential of the gas. 


  • Chemical Engineering Basics problems


    Search Results


    • 1. All of the following alloying elements of steel increases hardness but sacrifice ductility, except

    • Options
    • A. nickel
    • B. vanadium
    • C. molybdenum
    • D. chromium
    • Discuss
    • 2. Auto collimator is used to check

    • Options
    • A. flatness
    • B. angle
    • C. rotor balancing
    • D. roughness
    • Discuss
    • 3. An alloy of Fe - 0.4 % C is

    • Options
    • A. cast iron.
    • B. hypo-eutectoid steel.
    • C. hyper-eutectoid steel.
    • D. eutectoid steel
    • Discuss
    • 4. Annealing ofwhite cast iron produces __________ iron.

    • Options
    • A. grey
    • B. nodular
    • C. malleable
    • D. spheroidal
    • Discuss
    • 5. Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as

    • Options
    • A. Gr0.25, Gr
    • B. Gr0.25, Gr0.33
    • C. Gr, Gr0.25
    • D. Gr0.33, Gr0.25
    • Discuss
    • 6. Transition from laminar to turbulent zone in free convection heat transfer is governed by the critical value of

    • Options
    • A. Grashoff number.
    • B. Grashoff number & Reynolds number.
    • C. Reynolds number.
    • D. Grashoff number & Prandtl number.
    • Discuss
    • 7. In extrusion of metals, which of the following statement is true?

    • Options
    • A. speed of the extruded material is same as that of ram speed.
    • B. Redundant work is a function of the die angle.
    • C. Relative motion between the billet surface and the container wall is always present.
    • D. Hollow ram is used for indirect extrusion.
    • Discuss
    • 8. The usual energy consumption in electric arc furnace steel making is __________ KWh/ton of steel.

    • Options
    • A. 60 - 100
    • B. 400 - 700
    • C. 1200 -1500
    • D. 2000 - 2300
    • Discuss
    • 9. Sudden fall of atmospheric pressure by a large amount is an indication of the

    • Options
    • A. rain
    • B. cold wave
    • C. storm
    • D. fair weather
    • Discuss
    • 10. Energy of the sun arises mainly from __________ reactions.

    • Options
    • A. fusion
    • B. fission
    • C. combustion
    • D. none of these
    • Discuss


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