In addition to the main outermost scale on...

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Question 1 of 205eccef9dbacbc34ba4d460c2

In addition to the main outermost scale on the low side compound gage fitted to the portable service manifold, there are often one or more other scales on the face of the gage. What are these other scales?

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🔍 Key Concepts

• Relationship between pressure and temperature in a sealed refrigerant system • Meaning of compound gage and what the outer (main) scale measures • Difference between actual (measured) pressure/temperature and saturation conditions for refrigerants

💭 Think About

• Ask yourself: When using a service manifold, what extra information do technicians want to read directly from the gage without using a separate chart? • Think about how technicians determine refrigerant saturation temperature at a given pressure—how is that usually displayed? • Consider whether a pressure gage would realistically be used to show actual temperature or a temperature that corresponds to a phase-change (saturation) condition.

✅ Before You Answer

• Verify what the main outer scale of a compound gage normally measures (units and quantity). • Check which answer choices correctly pair refrigerants with either pressure or temperature on additional scales. • Confirm which property (pressure vs temperature) is most useful to show directly on a gage face when working with boiling/condensing refrigerants.

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