Corrosion MCQs

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1. sQ1. 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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