New Jersey Blue Seal Refrigeration Practice Exam 2025 – Complete Preparation Guide

Question: 1 / 400

What is the typical resistance range found in a compressor motor winding?

0-5 ohms

5-15 ohms

0-10 ohms

The typical resistance range found in a compressor motor winding is generally between 0-10 ohms. This range indicates that the windings are functioning correctly and are not shorted or open. Motor winding resistance within this range allows for proper current flow and efficient operation of the compressor.

Resistance values that fall below this range, such as close to 0 ohms, could indicate shorted windings, while values approaching or exceeding 10 ohms may suggest issues like higher resistance due to insulation breakdown or wear, which could lead to inefficiencies or potential failure in the compressor system. Understanding this resistance range is crucial for diagnosing potential problems in compressor performance and ensuring reliable operation in refrigeration systems.

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10-20 ohms

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