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Chemical Engineering :: Chemical Engineering Basics-2

  1. The velocity at which individual particles from a fluidised bed are carried away by the fluid passing through it, is defined as the

  2. A.

     Minimum fluidisation velocity

    B.

     Terminal velocity

    C.

     Elutriation velocity

    D.

     Superficial velocity

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  3. __________ of hard alloy and tool steel is done to make it easily machinable.

  4. A.

     Case carburising

    B.

     Tempering

    C.

     Normalising

    D.

     Annealing

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  5. Ultimate strength in tension as compared to that in shear for steel is

  6. A.

     Half

    B.

     One third

    C.

     One and half times

    D.

     One fourth

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  7. The predominant mode of heat transfer which takes place from boiler furnace to water walls of a boiler is

  8. A.

     Conduction

    B.

     Convection

    C.

     Both A & B

    D.

     Radiation

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  9. Sub zero treatment of steel is done to

  10. A.

     Suppress martensite transformation

    B.

     Enhance its working performance in sub zero atmosphere

    C.

     Reduce the retained austenite in hardened steel

    D.

     Induce temper brittleness after its hardening

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  11. __________ can replace tungsten in high speed steel.

  12. A.

     Chromium

    B.

     Vanadium

    C.

     Cobalt

    D.

     Molybdenum

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  13. 'Flare tower' used in industry is meant for

  14. A.

     Venting off (after burning) the excess inflammable/toxic gases at high pressure

    B.

     Absorbing the pollutant gases from the furnace exhaust

    C.

     Cooling of furnace exhaust gases

    D.

     None of these

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  15. A jig is used while __________ a hole.

  16. A.

     Boring

    B.

     Counter boring

    C.

     Drilling

    D.

     Enlarging

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  17. Which of the following heat treatment processes is usually applied to castings ?

  18. A.

     Tempering

    B.

     Annealing

    C.

     Normalising

    D.

     Carburising

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  19. Boiler draught of 10 mm water column is equivalent to

  20. A.

     1 kgf/m²

    B.

     10 kgf/m²

    C.

     10 kgf/mm²

    D.

     1 kgf/mm²

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