The flash point relationship for compressor oil must be:

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Prepare for the New York City Refrigeration License Exam I. Utilize flashcards, multiple-choice questions, and detailed explanations to boost your readiness. Ace your licensing exam!

Multiple Choice

The flash point relationship for compressor oil must be:

Explanation:
The important idea here is safety margin between the oil’s flash point and the compressor’s operating temperature. The flash point is the lowest temperature at which oil vapors can ignite in air. In a compressor, temperatures at the discharge side can become quite high, so the oil must not reach a temperature where its vapors could ignite. Therefore, the oil selected for a compressor must have a flash point higher than the compression (operating) temperature to prevent ignition and ensure safe operation. If the flash point were lower or even equal to the operating temperature, there would be a real risk of vapor ignition under normal running.

The important idea here is safety margin between the oil’s flash point and the compressor’s operating temperature. The flash point is the lowest temperature at which oil vapors can ignite in air. In a compressor, temperatures at the discharge side can become quite high, so the oil must not reach a temperature where its vapors could ignite. Therefore, the oil selected for a compressor must have a flash point higher than the compression (operating) temperature to prevent ignition and ensure safe operation. If the flash point were lower or even equal to the operating temperature, there would be a real risk of vapor ignition under normal running.

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