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Chemical Engineering :: Chemical Engineering Basics-2

  1. Out of the following, the most ductile material is

  2. A.

     Mild steel

    B.

     Copper

    C.

     Nickel

    D.

     Aluminium


  3. With increase in temperature, the surface tension of water

  4. A.

     Increases

    B.

     Decreases

    C.

     Remains constant

    D.

     Increases linearly


  5. Two solutions A₁ & A₂ have pH value of 2 & 6 respectively. It implies that the solution

  6. A.

     A₁ is more alkaline than solution A₂

    B.

     A₁ is highly acidic

    C.

     A₂ is very slightly acidic

    D.

     Both B & C


  7. The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is

  8. A.

     Full annealing

    B.

     Bright annealing

    C.

     Patenting

    D.

     None of these


  9. Compression ratio of an I.C. engine is the ratio of the

  10. A.

     Clearance volume to the volume swept by piston per stroke

    B.

     Volume of air in cylinder before compression to that after compression

    C.

     Pressure after compression to that before compression

    D.

     None of these


  11. Lead is added to 60:40 brass primarily to improve

  12. A.

     Machinability

    B.

     Corrosion resistance

    C.

     Fluidity

    D.

     Strength


  13. Specific __________ is a dimensionless quantity.

  14. A.

     Heat

    B.

     Humidity

    C.

     Weight

    D.

     None of these


  15. The size of the tetrahedral void in the closest packing of atoms is __________ that of the octahedral void.

  16. A.

     Equal to

    B.

     Greater than

    C.

     Less than

    D.

     Either A, B or C; depends on the size of atom


  17. Scaling occurs in boiler tubes due to the fact that, the solubility of Ca(OH)₂ __________ with increasing temperature.

  18. A.

     Increases

    B.

     Decreases

    C.

     Shows inversion of solubility

    D.

     None of these


  19. Out of the following, the lowest packing of atoms exists in __________ crystal lattice structure.

  20. A.

     Hexagonal close, packed (hcp)

    B.

     Face centred cubic (fcc)

    C.

     Body centred cubic (bcc)

    D.

     Simple cubic