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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

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  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

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  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

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  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

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  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

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  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

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  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

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  15. Ferrites are __________ magnetic.

  16. A.

     Anti

    B.

     Para

    C.

     Ferri

    D.

     Ferro

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  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

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  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

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