Which option correctly identifies two common root causes of pump seal leaks and their mitigations?

• A. Contaminants causing abrasion and improper installation; mitigate with proper pre-cleaning, correct installation torque, and clean fluid.
• B. Electrical faults and vibration; mitigate with insulation and balancing.
• C. Over-lubrication and excessive cooling; mitigate with reduced lubrication.
• D. Incorrect seal material and improper torque; mitigate with changing manufacturer.

Answer: (A)

The situation tests understanding of what commonly causes pump seal leaks and how to prevent them. Two frequent root causes are debris or contaminants in the fluid that wear or score the seal faces (abrasion) and an installation that hasn’t seated the seal properly, leading to gaps or uneven contact. When debris is present, the seal surface can be scratched or worn quickly, creating leakage paths. If the seal isn’t installed with the correct seating and preload, it may not make a uniform seal against its mating surface, so leakage occurs even if the seal material is sound.

Mitigations focus on keeping the sealing surfaces clean and ensuring the seal is mounted correctly. Pre-cleaning and flushing the system or using clean, filtered fluid minimize abrasive particles that would wear the seal. Applying the correct installation torque and verifying proper seating ensure the seal is pressed evenly into place, preventing gaps that let fluid leak. Together, these actions address the most common causes at their source and reduce the likelihood of leaks.

Other options shift attention to issues like electrical faults or vibration, lubrication, or material choices, which can influence seal life but are not the primary two causes of leaks in this context, or suggest impractical fixes.