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Chemical Engineering :: Chemical Engineering Basics-2

  1. Corona discharge is related to the operation of a/an

  2. A.

     Induction motor

    B.

     Electrostatic precipitator

    C.

     Fast breeder reactor

    D.

     Magneto hydrodynamic generator (MHD)


  3. Thermal equivalent of electrical power in practical calculation is __________ kcal/kWh.

  4. A.

     746

    B.

     3000

    C.

     1000

    D.

     550


  5. Upto the critical radius of insulation, added insulation, will

  6. A.

     Increase the heat loss

    B.

     Decrease heat loss and will have no effect beyond that

    C.

     Decrease heat flux

    D.

     Reduce convection heat loss compared to conduction heat less


  7. For grinding of softer materials, the grinding wheel should have __________ grain size.

  8. A.

     Finer

    B.

     Coarser

    C.

     Medium

    D.

     Any type of


  9. Chromium molybdenum steel can not be welded using __________ welding.

  10. A.

     Thermit

    B.

     Electrical resistance

    C.

     Oxy-acetylene

    D.

     Any of these


  11. Titanium can be easily welded using __________ welding.

  12. A.

     Submerged arc

    B.

     TIG

    C.

     Shielded metal arc

    D.

     Electroslag


  13. The most suitable material for die casting is

  14. A.

     Iron

    B.

     Copper

    C.

     Steel

    D.

     Nickel


  15. Lead pencil contains

  16. A.

     Graphite

    B.

     Lead sulphide

    C.

     Lead

    D.

     Both B & C


  17. The refractory lining of the bottom in a basic electric arc furnace is made of

  18. A.

     Silica

    B.

     Alumina

    C.

     Magnesia

    D.

     Fireclay


  19. In TIG welding, thoriated tungsten electrodes are used, because it

  20. A.

     Has higher current carraying capacity

    B.

     Has better electron emissivity

    C.

     Is stronger than ordinary tungsten

    D.

     Is easy to prepare