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Chemical Engineering :: Chemical Engineering Basics-2

  1. The driving force for the sintering of a powder compact is

  2. A.

     Strain energy

    B.

     Surface energy

    C.

     Volume energy

    D.

     Stacking fault energy


  3. The moment of inertia of a body comes into play in __________ motion.

  4. A.

     Curvilinear

    B.

     Linear

    C.

     Rotational

    D.

     None of these


  5. Overheating of satellites during re-entry to earth is controlled by

  6. A.

     Thick insulation

    B.

     Ceramic lining

    C.

     Cooling by flow of air over the surface

    D.

     None of these


  7. Pick out the wrong statement.

  8. A.

     Erosion corrosion which is identified by surface grooves, occurs due to the combined action of corrosive environment and mechanical abrasion

    B.

     Stress corrosion occurs due to the combined action of corrosive environment and the compressive stress

    C.

     Stainless steel is prone to stress corrosion in solution containing chloride ion

    D.

     In case of stress corrosion, the direction of crack propagation is perpendicular to the applied tensile stress


  9. Ferromagnetic material owe their properties to __________ inner sub-shells.

  10. A.

     Completely filled

    B.

     Partially filled

    C.

     Equally filled

    D.

     Vacant


  11. Which of the following mainly decides the current to be employed is arc welding?

  12. A.

     Electrode size

    B.

     Plate thickness

    C.

     Voltage across the arc

    D.

     Welded portion length


  13. The delivery pressure of boiler feed water pump compared to the boiler steam pressure is

  14. A.

     Same

    B.

     Slightly less

    C.

     Slightly more

    D.

     Much more


  15. The radioactive isotope of hydrogen is

  16. A.

     Deuterium

    B.

     Tritium

    C.

     Protium

    D.

     None of these


  17. In the floatation process, pine oil is used as the

  18. A.

     Collector

    B.

     Activator

    C.

     Frother

    D.

     Depressant


  19. Normalising does not __________ of a metal.

  20. A.

     Improve machinability & tensile strength

    B.

     Remove internal stresses

    C.

     Refine the structure

    D.

     Remove strains caused by cold working