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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Q. Which of the following is/are the aqueous organisms that influence the corrosion of metals in the water?

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Q. The liquid-metal corrosion is usually a physical effect rather than an electrochemical attack.

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Q. Which of the following is/are the types of liquid-metal corrosion?

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Q. Which of the following is/are undesirable in heat-exchange systems handling liquid metals?

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Q. Which of the following parameter has a direct relation with the corrosion rate in liquid metals?

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Q. Which of the following materials shows good resistance to both liquid-metals and high-temperature oxidation?

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Q. Which of the following type of stainless steels are attacked by magnesium at its melting point?

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