Marine Electrical Systems USCG Question #273 (Set 10)

What type of DC motor is never connected to a belt driven load?

Official USCG Answer & Rule Citation

Correct Answer: Option A — series wound

Series-wound DC motors dangerously overspeed if load is suddenly lost or reduced. According to IEEE 45, connecting a series motor to a belt-driven load creates a hazard where belt slippage or failure causes the motor to run away and destroy itself.

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