An unloader is installed on an air...

An unloader is installed on an air...

Question 1 of 270705eccef9bbacbc34ba4d45578

An unloader is installed on an air compressor to __________.

Question 1 of 27070

Q

An unloader is installed on an air compressor to __________.

🔍 Key Concepts

• Function of an unloader in reciprocating air compressors • What happens to motor starting current and mechanical load when a compressor starts under full pressure • Difference between pressure control devices (like governors/relief valves) and devices that affect starting conditions

💭 Think About

• Before looking at the choices, ask yourself: At what point in the compressor’s operation does an unloader do its main job—during normal running, or mainly at start‑up? • Which device would be used to keep the discharge pressure from getting too high in normal operation, and is that the same thing as an unloader? • Think about the mechanical strain and electrical load if the compressor had to start while compressing against full system pressure—what would an unloader do to change that situation?

✅ Before You Answer

• Identify whether the unloader’s primary role is continuous pressure control or reducing starting load. • Separate in your mind: safety/relief valves versus unloaders—they act at different times and for different purposes. • Check which option best describes changing the compression load during the starting period, not during normal full‑speed operation.