Air Conditioning Repair Certification (ETI) Practice Exam

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What is a primary function of a mechanical shaft seal in refrigeration systems?

To prevent air leakage

To contain liquid refrigerant

A mechanical shaft seal plays a critical role in refrigeration systems by ensuring that the liquid refrigerant remains contained within the system. This containment is vital for maintaining the efficiency and effectiveness of the refrigeration cycle. If the refrigerant were to leak out, it could result in decreased performance, increased energy consumption, and potential damage to the system. The seal prevents the refrigerant from escaping while allowing the shaft of the compressor to rotate, effectively balancing the internal pressure of the system with the demands of operation.

This containment function is crucial to the overall performance and reliability of refrigeration systems, as any loss of refrigerant not only diminishes cooling capacity but can also lead to environmental concerns. Properly functioning mechanical shaft seals are therefore key to ensuring the longevity and efficiency of refrigeration equipment.

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To enhance compressor efficiency

To facilitate thermal conductivity

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