🔍 Key Concepts

• Manufacturer’s recommended maintenance for AC motor controllers • Safe cleaning methods for electrical equipment • Why you avoid certain chemicals, water, and high-pressure air on energized or delicate components

💭 Think About

• Which option describes actions you would normally take during a scheduled inspection without disassembling or exposing the equipment to extra risk? • Think about what electricians actually do first when checking a controller for loose parts, overheating, or arcing — which choice matches that? • Which answers involve introducing a substance or force (chemical, water, high-pressure air) that could damage insulation, push debris deeper, or create a safety hazard?

✅ Before You Answer

• Eliminate any choices that introduce corrosive chemicals or substances known to be unsafe for electrical insulation • Eliminate options that could force debris into coils, contacts, or bearings rather than gently removing it • Focus on the option that is primarily inspection and minor tightening rather than aggressive cleaning methods