Question 314General Subjects - QMED

The correct answer is C) Carbon. Carbon is the most commonly used dynamic seal material for mechanical seals installed on centrifugal pumps used in water service. Carbon is an ideal material for this application due to its excellent wear resistance, low friction, and compatibility with water. The porous structure of carbon also helps with lubrication and heat dissipation, making it well-suited for the dynamic sealing environment of a centrifugal pump. The other options are not the typical dynamic seal materials used in this application. Copper and bronze are more commonly used for static seals or bearings, while copper and carbon would not provide the necessary wear resistance and lubrication properties required for a dynamic mechanical seal in a water pump.