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Chemical Engineering :: Chemical Engineering Basics-2

  1. Stresses encountered in the metal forming processes are less than the __________ of the material.

  2. A.

     Fracture strength

    B.

     Yield strength

    C.

     Elastic limit

    D.

     Limit of proportionality


  3. Reduction in the grain size reduces the __________ of the material.

  4. A.

     Fatigue resistance

    B.

     Tensile strength

    C.

     Creep resistance

    D.

     All of the above


  5. The maximum value, which the residual stress in a material can reach is the __________ of the material.

  6. A.

     Elastic limit

    B.

     Plastic limit

    C.

     Yield stress

    D.

     Breaking stress


  7. Freezing of 35% oleum during its shipment in winter is avoided by the addition of small amount of

  8. A.

     Hydrochloric acid

    B.

     Methyl alcohol

    C.

     Formic acid

    D.

     Nitric acid


  9. __________ addition increases the depth of hardness of steel.

  10. A.

     Chromium

    B.

     Nickel

    C.

     Tungsten

    D.

     Vanadium


  11. Consider the equilibrium A(g) + B(g) = AB(g). When the partial pressure of A is 10⁻² atm, the partial pressure of B is 10⁻³ atm and the partial pressure of AB is 1 atm, the equilibrium constant 'K' is

  12. A.

     10 atmv

    B.

     10⁵ atm⁻¹

    C.

     10 (dimensionless)

    D.

     10⁵ (dimensionless)


  13. Out of the following, the __________ pipe has the least corrosion resistance.

  14. A.

     Mild steel

    B.

     Copper

    C.

     Cast iron

    D.

     Wrought iron


  15. Electrical conductivities of semi-conductors are of the order of __________ ohm/cm.

  16. A.

     10-3

    B.

     103

    C.

     10-15

    D.

     L015


  17. Which of the following is not categorised as the ore agglomeration process?

  18. A.

     Nodulising

    B.

     Pelletising

    C.

     Balling

    D.

     Briquetting


  19. The activity co-efficient of the solute in a dilute solution

  20. A.

     Decreases with the increase of concentration of the solute

    B.

     Increases with the increase of concentration of the solute

    C.

     Remains constant

    D.

     Is unity at infinite dilution