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Chemical Engineering :: Chemical Engineering Basics-2

  1. Boiling temperature of carbon dioxide at atmospheric pressure is __________ °C.

  2. A.

     -30.5

    B.

     -78.5

    C.

     -183.5

    D.

     -10.5


  3. Silicon percentage in the silicon steel used for electrical appliances/equipments is

  4. A.

     0.3-0.4

    B.

     12-14

    C.

     3-4

    D.

     20-25


  5. Silicon percentage in the silicon steel used for electrical appliances/equipments is

  6. A.

     0.3-0.4

    B.

     12-14

    C.

     3-4

    D.

     20-25


  7. Endurance is a measure of fatigue limit of a metal. Fatigue crack in nitrided machine parts originates

  8. A.

     At the surface

    B.

     Within the core

    C.

     Just below the surface

    D.

     Anywhere on the surface


  9. The type of water filter normally employed/ preferred for treating small quantities of water in railway stations and individual industries is the __________ filter.

  10. A.

     Rapid sand

    B.

     Pressure

    C.

     Gravity

    D.

     Slow sand


  11. A simple closed grinding circuit may consist of

  12. A.

     A ball mill and a classifier

    B.

     A rod mill and a hydrocyclone

    C.

     A jaw crusher and a hydrocyclone

    D.

     A ball mill and a froth floatation cell


  13. Which of the following is categorised as the plastic welding?

  14. A.

     Gas welding

    B.

     Electric arc welding

    C.

     Forge welding

    D.

     None of these


  15. Ferrites are __________ magnetic.

  16. A.

     Anti

    B.

     Para

    C.

     Ferri

    D.

     Ferro


  17. The most prominent single cause of corrosion in boilertubes, drums, economisers and steam superheaters in a thermal power plant boiler is the

  18. A.

     Water alkalinity & leakage

    B.

     Hydrazine addition during feed water treatment

    C.

     Release of non-condensable gas from water in the boiler

    D.

     Scale formation


  19. Which of the following emissions in the exhaust gas of an I.C. engine causes the formation of photochemical smog?

  20. A.

     Nitrogen oxides

    B.

     Hydrocarbons

    C.

     Both A & B

    D.

     Carbon monoxide