Which term describes the allowable overload for motors, commonly in the 5-20% range?

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Multiple Choice

Which term describes the allowable overload for motors, commonly in the 5-20% range?

Explanation:
The concept being tested is how much extra load a motor can handle beyond its nameplate rating. That is described by the service factor. It’s a multiplier (usually around 1.15–1.20), meaning the motor can deliver about 15–20% more output than its rated horsepower for short periods when cooling is adequate. This allowance is intended for brief overloads, not continuous operation, and it depends on proper cooling and operating conditions. Efficiency, load factor, and power factor measure different things: efficiency is how well input power is converted to useful output, load factor reflects how much of the rated capacity is used over time, and power factor relates to the phase relationship between voltage and current.

The concept being tested is how much extra load a motor can handle beyond its nameplate rating. That is described by the service factor. It’s a multiplier (usually around 1.15–1.20), meaning the motor can deliver about 15–20% more output than its rated horsepower for short periods when cooling is adequate. This allowance is intended for brief overloads, not continuous operation, and it depends on proper cooling and operating conditions. Efficiency, load factor, and power factor measure different things: efficiency is how well input power is converted to useful output, load factor reflects how much of the rated capacity is used over time, and power factor relates to the phase relationship between voltage and current.

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