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Chemical Engineering :: Chemical Engineering Basics

  1. Which of the following is not an ore of zinc?

  2. A.
    Cerrusite
    B.
    Franklinite
    C.
    Calamine
    D.
    Troosite

  3. Pressure gauges are never connected directly to the live steam line; rather a loop or syphon is interposed as close as possible to the pressure gauge. This is done to

  4. A.
    avoid the overheating of the tubes & bellows which operate them to minimise error and damage.
    B.
    form a seal of water by steam condensate to fill the tube or bellows at the pressure being measured.
    C.
    both 'a' & 'b'.
    D.
    avoid the static head error introduced by steam entry.

  5. Phosphorous is added to copper melt to

  6. A.
    remove hydrogen.
    B.
    deoxidise the metal.
    C.
    improve fluidity.
    D.
    reduce shrinkage.

  7. Which of the following is not a suitable solid lubricant ?

  8. A.
    Talc
    B.
    Molybdenum disulphide
    C.
    Graphite
    D.
    None of these

  9. On an average __________ fast neutrons are produced by nuclear fission of each atom of uranium-235.

  10. A.
    1
    B.
    2.5
    C.
    3.5
    D.
    5

  11. Castability of aluminium is increased by the addition of __________ in it.

  12. A.
    silicon
    B.
    manganese
    C.
    bismuth
    D.
    lead

  13. Addition of __________ to steel can not impart it high strength at elevated temperature.

  14. A.
    nickel
    B.
    magnesium
    C.
    silicon
    D.
    manganese

  15. Hard magnetic materials have high

  16. A.
    coercive force.
    B.
    residual magnetic induction.
    C.
    both 'a' & 'b'.
    D.
    neither 'a' nor 'b'.

  17. The difference in the properties of a substance in three states of matter depends upon the

  18. A.
    binding energy of atoms.
    B.
    difference in molecular shape.
    C.
    difference in intermolecular forces.
    D.
    none of these.

  19. Ignition of fuel in a diesel engine is by

  20. A.
    spark
    B.
    hot compressed air
    C.
    fuel injection
    D.
    none of these