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Chemical Engineering :: Chemical Engineering Basics-2

  1. Which of the following relationships is correct for relating the three elastic constants of an isotropic elastic material (where, E = Young's modulus, G = Modulus of rigidity or shear modulus v = Poisson's ratio)?

  2. A.

     E = 2G (1 + v)

    B.

     E = G (1 + v)

    C.

     E = G (1 + v)/2

    D.

     E = 2G (1 + 2v)


  3. Dephosphorisation of molten pig iron is favoured by

  4. A.

     Oxidising and basic slag

    B.

     Reducing and basic slag

    C.

     High activity co-efficient of phosphorous in metal

    D.

     Oxidising and neutral slag


  5. Commonly used flux for brazing is

  6. A.

     Zinc chloride

    B.

     Borax

    C.

     Ammonium chloride

    D.

     Rosin


  7. For a small scale toy factory, the fixed cost per month is Rs. 5000/-. The variable cost per toy is Rs. 20 and sales price is Rs. 30 per toy. The break even production per month will be __________ toys.

  8. A.

     250

    B.

     500

    C.

     1000

    D.

     3000


  9. Air-petrol ratio in an automotive petrol engine is around

  10. A.

     14 : 1

    B.

     22 : 1

    C.

     25 : 1

    D.

     4 : 1


  11. A balanced draught boiler furnace employs __________ draught fan.

  12. A.

     Induced

    B.

     Forced

    C.

     Both A & B

    D.

     Neither A nor B


  13. The normal stress is the same in all directions at a point in a fluid, only when the fluid

  14. A.

     Is at rest & has zero viscosity

    B.

     Is frictionless

    C.

     Fluid layer has no motion relative to an adjacent layer of fluid

    D.

     Is incompressible & frictionless


  15. Consider an ideal solution of components A and B. The entropy of mixing per mole of an alloy containing 50 wt% B is

  16. A.

     R ln 2

    B.

     -R ln 2

    C.

     3 R ln 2

    D.

     -3R ln 2


  17. __________ of test specimens is not involved in any hardness testing method.

  18. A.

     Fracture

    B.

     Indentation

    C.

     Wear

    D.

     Scratch


  19. The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as

  20. A.

     Rigid

    B.

     Tough

    C.

     Ductile

    D.

     Plastic