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Chemical Engineering :: Chemical Process

  1. Which of the following impurities in feed water for high pressure boiler is the most detrimental ?

  2. A.
    Silica
    B.
    Dissolved oxygen
    C.
    Suspended salt
    D.
    Dissolved salt

  3. Which glass is usually used in optical work?

  4. A.
    Lead glass
    B.
    High silica (borosilicate) glass
    C.
    Photo-sensitive glass
    D.
    Fibre glass

  5. Fourdrinier machine is used in the manufacture of

  6. A.
    sugar
    B.
    paper
    C.
    alcohol from molasses
    D.
    phenol formaldehyde

  7. The most popular and common detergent i.e., alkyl benzene sulfonate (ABS) is a/an __________ detergent.

  8. A.
    cationic
    B.
    anionic
    C.
    amphoteric
    D.
    semi polar

  9. Reaction of calcium carbide with water produces a gas, which is used

  10. A.
    as an illuminant.
    B.
    for metal cutting/welding.
    C.
    both (a) & (b).
    D.
    neither (a) nor (b).

  11. Salt is the basic raw material for the manufacture of

  12. A.
    cement
    B.
    glass
    C.
    potteries
    D.
    caustic soda

  13. Pick out the wrong statement.

  14. A.
    Low intensity explosives are also called propellants, whereas high intensity explosive are called detonators.
    B.
    Gun powder comprises of 75% salt petre, 15% charcoal and 10% sulphur.
    C.
    Lead azide is a popular military explosive.
    D.
    TNT is a hygroscopic explosive having very high melting point and is non-toxic to human being.

  15. Hydrazine (N2H4) is used mainly as a/an

  16. A.
    explosive
    B.
    rocket fuel
    C.
    detergents additive
    D.
    none of these

  17. Hydrocynic acid (HCN) is used as an insecticide for

  18. A.
    controlling timber degradation by ants
    B.
    controlling poultry lice
    C.
    potato beetle
    D.
    citrus fruits

  19. Molecular weight of plastics ranges from

  20. A.
    5000 to 10000
    B.
    20000 to 250000
    C.
    500 to 5000
    D.
    106 to l09