Question 393General Subjects - Assistant Engineer

70% to pass

Which of the materials listed is used as the dynamic seal material on mechanical seals installed on most centrifugal pumps used in water service?

ABronze.
BCarbon.
CCopper and carbon.
DCopper.
AI Explanation

The correct answer is B) Carbon. Carbon is the most common dynamic seal material used in mechanical seals installed on centrifugal pumps in water service. Carbon is an ideal material for this application due to its excellent wear resistance, low coefficient of friction, and compatibility with water. The carbon seal faces provide a reliable, long-lasting seal that can withstand the operating conditions of centrifugal pumps in water applications. The other answer choices are incorrect because: A) Bronze is not commonly used as a dynamic seal material, B) Copper is not used as a dynamic seal material, and C) Copper and carbon is not a typical dynamic seal composition for centrifugal pump applications.

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Official Resources
46 CFR Machinery & Electrical 46 CFR Engineering USCG National Maritime Center
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