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Chemical Engineering :: Chemical Engineering Basics-2

  1. Electrochemical corrosion can occur, only if __________ is present in contact with metal.

  2. A.

     Air

    B.

     Oxygen

    C.

     Liquid medium

    D.

     Gaseous medium


  3. A spring material should have low

  4. A.

     Elastic limit

    B.

     Deflection value

    C.

     Fatigue resistance

    D.

     None of these


  5. Which of the following metals can not be extracted by pyrometallurgical process from its sulphide ore?

  6. A.

     Copper

    B.

     Mercury

    C.

     Lead

    D.

     None of these


  7. Alloy powder manufactured by the following process have spherical shapes.

  8. A.

     Electrochemical deposition

    B.

     Gaseous reduction

    C.

     Atomisation

    D.

     Mechanical attrition


  9. Fire refining process is employed in case of

  10. A.

     Tin

    B.

     Copper

    C.

     Zinc

    D.

     Aluminium


  11. Hot extrusion process is not used for making

  12. A.

     Cast iron pipe for domestic water supply

    B.

     Aluminium curtain rods

    C.

     Stainless steel tubes used in furnitures

    D.

     Any of these


  13. Addition of beryllium to copper is done mainly to produce a/an __________ alloy.

  14. A.

     Non-sparking & non-magnetic

    B.

     High strength

    C.

     Precipitation hardenable

    D.

     Corrosion resistant


  15. In __________ process, ions of salts react with water to produce acidity or alkalinity.

  16. A.

     Hydration

    B.

     Hydrolysis

    C.

     Electrolysis

    D.

     Dialysis


  17. Impeller & casing of centrifugal pump handling corrosive liquid and frequently running under cavitation condition is most prone to __________ corrosion.

  18. A.

     Uniform

    B.

     Oxygen diffusion

    C.

     Pitting

    D.

     Inter-granular


  19. The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron?

  20. A.

     159

    B.

     1837

    C.

     2537

    D.

     10000