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Chemical Engineering :: Chemical Engineering Basics-2

  1. Water-tube boiler is the one, in which

  2. A.

     Water passes through tubes and flue gases around it

    B.

     Tube carrying hot flue gases are immersed in a pool of water

    C.

     Tubes are placed in vertical position

    D.

     None of these

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  3. The expected efficiency of a single rivetted lap joint is of the order of 50%. If the thickness of the plate is increased four times, then the rivet diameter will have to be increased __________ times.

  4. A.

     Two

    B.

     Four

    C.

     Six

    D.

     Eight

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  5. Resilience of a bolt can be increased by increasing its

  6. A.

     Length

    B.

     Shank diameter

    C.

     Head diameter

    D.

     None of these

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  7. The temperature at which a gas, when subjected to Joule-Thomson expansion, neither cools or heats up, is termed as the __________ temperature. Above this temperature the gas heats up on throttling and below this the gas cools down.

  8. A.

     Isotactic

    B.

     Saturation

    C.

     Inversion

    D.

     Throttling

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  9. Unit molar solution of __________ is the best conductor of electricity.

  10. A.

     Sodium chloride

    B.

     Acetic acid

    C.

     Sulphuric acid

    D.

     Sucrose

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  11. Lead is poured into the joint between two- __________ pipes.

  12. A.

     Mild steel

    B.

     Concrete

    C.

     Cast iron

    D.

     Asbestos cement

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  13. The hardenability of steel decreases with

  14. A.

     Decrease in dislocation density

    B.

     Increase in solutionising temperature

    C.

     Increase in strength

    D.

     Decrease in grain size

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  15. Which of the following phenomenon will exhibit the minimum heat transfer?

  16. A.

     Boiling

    B.

     Forced convection in air

    C.

     Free convection in air

    D.

     Conduction in air

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  17. __________ are normally subjected to sub-zero treatment.

  18. A.

     Highly stressed parts

    B.

     Gauges or precision parts

    C.

     Cold rolled sheets

    D.

     Non machinable materials

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  19. Blast furnace is a

  20. A.

     Counter current reactor

    B.

     Co-current reactor

    C.

     Cross-current reactor

    D.

     Combination of all the three

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