Squirrel-cage induction motors are associated with which practice?

• A. Have three moving parts
• B. Checks motors for safety and standards
• C. Do not require maintenance
• D. Are used only in DC systems

Answer: (B)

Regular safety checks and adherence to standards are essential when operating squirrel-cage induction motors. These motors are known for their rugged, simple construction and widespread use in AC systems, which is why many maintenance programs emphasize routine checks to ensure safe operation and compliance with electrical codes. Even though they are robust and typically require less maintenance than more complex motor types, periodic inspections of insulation, grounding, connections, bearing condition, lubrication, alignment, and protection devices help prevent faults and keep the system safe and up to standard. The other statements don’t fit as well: they aren’t defined by having three moving parts, they do require maintenance, and they are not used only in DC systems.