Corrosion MCQs

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1. . In corrosion the chemical reaction is:





2. . Which one of the following causes corrosion of Iron:





3. . The colour of corrosion product of silver is:





4. . The colour of corrosion product of copper is:





5. . Which one of the following metal does not corrode:





6. . The chemical composition of rust is:





7. . Forming, welding, or heat treatment of metal can cause:





8. . A common corrosion which deteriorates the whole surface of the metal and makes the surface thin is:





9. . The corrosion due to the movement of corrosive liquids is:





10. . The corrosion of underground pipes, cables etc. is called:





11. . The corrosion of iron is called:





12. . The corrosion makes holes which are large in depth is called:





13. . Corrosion on the surface of a metal due to direct reaction of atmospheric gases is:





14. . The organisms causing the greatest corrosion problems are:





15. . A process in which metal is protected from corrosion by dipping it in molten zinc is called:





16. . A process in which metal is protected from corrosion by cementing zinc powder is called:





17. . A process in which the coat metal is deposited on the base metal by passing a direct current is called:





18. . A cementation with 55% Chromium powder & 45% Alumina for protection from corrosion is called:





19. . A cementation with Aluminium and Alumina powder for protection from corrosion is called:





20. . The bonding together of dissimilar metals by pressure is called:





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