Oklahoma Service Technician Practice Exam

Question: 1 / 400

What is a refrigerant?

A gas that creates static electricity

A substance used in cooling systems to regulate temperature

A refrigerant is a substance that plays a crucial role in cooling systems, such as air conditioners and refrigeration units, by absorbing and releasing heat as it circulates through the system. In the refrigeration cycle, the refrigerant changes states from liquid to gas and back, allowing it to efficiently transport heat away from the area being cooled. This regulation of temperature is fundamental to the operation of cooling systems, making the use of the correct refrigerant essential for efficiency and performance.

The other options describe unrelated concepts; for instance, static electricity is associated with electrification rather than temperature regulation, lubricants are materials used to reduce friction between moving parts, and tools are instruments used by technicians to perform maintenance or repairs, but do not describe substances involved in cooling processes.

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A type of lubricant

A tool for HVAC technicians

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