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Chemical Engineering :: Chemical Engineering Basics-2

  1. Maximum permissible sulphur content in steel is __________ percent.

  2. A.

     0.015

    B.

     0.055

    C.

     0.505

    D.

     0.805


  3. Prandtl mixing length in turbulent flow signifies the

  4. A.

     Average distance perpendicular to the mean flow covered by the mixing particles

    B.

     Wavelength corresponding to the lowest frequency present in the flow field

    C.

     Ratio of mean free path to characteristic length of the flow field

    D.

     Magnitude of turbulent kinetic energy


  5. __________ is the process of coating the surface of steel with aluminium oxide, thereby imparting it increased resistance to corrosion & oxidation upto a temperature of 700°C.

  6. A.

     Vaneering

    B.

     Galvanising

    C.

     Electroplating

    D.

     Calorising


  7. The concentration of (H⁺) ions is 4 x 10⁻⁵ in a solution. Then pH of the solution will be (Given log 4 = 0.6 )

  8. A.

     4.4

    B.

     5.6

    C.

     8.4

    D.

     2.4


  9. Maxwell's thermodynamic relations applies to the

  10. A.

     Chemical systems in equilibrium

    B.

     Mechanical systems in equilibrium

    C.

     Irreversible thermodynamic processes

    D.

     Reversible thermodynamic processes


  11. Which of the following is not found in iron-carbon equilibrium diagram?

  12. A.

     Curie point

    B.

     Peritectic point

    C.

     Eutectic point

    D.

     Eutectoid point


  13. Heating of an ore below its melting point in presence of excess of air is called

  14. A.

     Calcination

    B.

     Smelting

    C.

     Roasting

    D.

     Sublimation


  15. Alloying elements present in Hayness stel-lite, which has superior performance than high speed steel, are

  16. A.

     Nickel, cobalt & chromium

    B.

     Tungsten, chromium & cobalt

    C.

     Manganese, chromium & cobalt

    D.

     Tungsten, molybdenum & nickel


  17. When the weight of a ball inside the ball mill is just balanced by the centrifugal force,

  18. A.

     The ball abandons its circular path for a parabolic path

    B.

     The ball abandans its parabolic path for a circular path

    C.

     The ball continues to move on a circular path

    D.

     The ball continues to move on a parabolic path


  19. Electrode potential is not concerned with the measurment of

  20. A.

     PH value

    B.

     Temperature

    C.

     Viscosity

    D.

     Density