Question 102Refrigeration & AC - QMED

70% to pass

When installing a mechanical shaft seal on a refrigeration compressor, extreme care must be taken to prevent what from happening?

Aany lubricant from contacting the carbon surface that would cause the expulsion of the saturated Teflon film

Bany lubricant from contacting the stationary seal face that would cause etching of the face surface

Cthe spring from being damaged by the corrosive effects of excessive handling

Ddirt and foreign particles from coming in contact with the highly polished sealing surfaces

AI Explanation

The correct answer is D) dirt and foreign particles from coming in contact with the highly polished sealing surfaces. When installing a mechanical shaft seal on a refrigeration compressor, extreme care must be taken to prevent dirt and foreign particles from contacting the highly polished sealing surfaces. This is because any contaminants on these surfaces can cause uneven wear, leakage, and premature failure of the seal. The sealing faces need to maintain a perfect finish to ensure a tight, leak-free seal. The other answer choices are incorrect as they do not address the critical need to protect the sealing surfaces from contamination during installation.