A refrigeration unit using an open compressor that has not been used in several months is likely to leak from the rotating shaft ______.

Study for the EPA Type 2 Test. Explore flashcards and multiple choice questions, with each question offering hints and explanations. Get prepared for your exam!

Multiple Choice

A refrigeration unit using an open compressor that has not been used in several months is likely to leak from the rotating shaft ______.

Explanation:
The rotating shaft is meant to be sealed where it passes through the compressor housing to prevent refrigerant from leaking along the shaft. In an open compressor, the shaft seal (the barrier around the shaft) is what keeps the high-pressure refrigerant inside and the environment outside. When the unit hasn’t run for months, the lubrication around the seal can dry out or the seal material can harden or wear, allowing refrigerant to seep past the seal and leak along the shaft. Gaskets and O-rings seal joints or static interfaces, not the continuous shaft seal in this setup. Bearings merely support the shaft’s rotation and aren’t the source of a refrigerant leak. So the shaft seal is the most likely leakage point.

The rotating shaft is meant to be sealed where it passes through the compressor housing to prevent refrigerant from leaking along the shaft. In an open compressor, the shaft seal (the barrier around the shaft) is what keeps the high-pressure refrigerant inside and the environment outside. When the unit hasn’t run for months, the lubrication around the seal can dry out or the seal material can harden or wear, allowing refrigerant to seep past the seal and leak along the shaft. Gaskets and O-rings seal joints or static interfaces, not the continuous shaft seal in this setup. Bearings merely support the shaft’s rotation and aren’t the source of a refrigerant leak. So the shaft seal is the most likely leakage point.

More practice questions