🔍 Key Concepts

• Air compressor starting load and why it matters for electric motors • How cylinder unloaders affect when compression actually begins • Difference between changing speed vs changing load on a compressor

💭 Think About

• Think about what makes it hard for a compressor’s drive motor to start turning from a dead stop. How could unloaders help with that? • Do unloaders usually change the compressor’s RPM, or do they change whether the cylinder is doing compression work or not? • Which choice describes a condition that happens specifically at the moment of starting, rather than during normal running under varying loads?

✅ Before You Answer

• Identify which options talk about speed control versus load/no-load control • Focus on which choice refers to the compressor being able to reach operating speed before doing heavy compression work • Eliminate any answer that suggests the unloader directly controls temperature or air density inside the receiver rather than the compression process itself