Q. Which of the following impurities that causes corrosion difficulties in refinery operations?

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Q. Water acts as an electrolyte and causes corrosion as it tends to hydrolyze chlorides and other materials to form an acidic environment.

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Q. Which of the following is/are the desalting methods in the petroleum industry?

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Q. Ammonia is used to control the pH of the water and to reduce chloride acidity in the process stream.

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Q. Which of the chemical is/are added for the removal of hydrogen sulfide and neutralization?

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Q. Which of the following impurity that causes rapid intergranular stress corrosion cracking of sensitized austenitic stainless steels in refinery operations?

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Q. Which of the following metals is/are usually used for heat exchanger tubes carrying water?

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Q. Which of the following element is the most beneficial alloying element in steel for resistance to sulfur compounds?

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Q. Biological corrosion is a deterioration of a metal by the corrosion process that occurs directly or indirectly due to the activity of living organisms.

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Q. Which of the following environments in which the biological activity may influence corrosion?

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Q. Which of the following is/are the processes that affect the corrosion behavior of metals by biological activity?

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Q. Which of the following component is taken into account to classify aerobic and anaerobic organisms?

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Q. Which of the following organisms are regarded as microorganisms?

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Q. Which of the following anaerobic bacteria that influence the corrosion behavior of buried steel structures?

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Q. Thiobacillusthiooxidans are the type of aerobic bacteria that are capable of oxidizing sulfur-bearing compounds to sulfuric acid.

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Q. Which of the following coatings is/are used for the prevention of microbiological corrosion in buried steel?

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Q. Which of the following is/are the preventions of microbiological corrosion in soil?

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Q. Which of the following acids are produced by microorganisms such as fungus and mold?

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Q. Which of the following materials is/are usually attacked by fungus?

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Q. Which of the following is/are the preventions for the growth of mold on metal surfaces?

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