USCG Exam PracticeMotors and generators
Which type of DC motor is MOST appropriate for driving a centrifugal pump where nearly constant speed from no load to full load is required?
- A. Series-wound motor
- ✓ Shunt-wound motorCorrect
- C. Compound-wound motor
- D. Separately excited series motor
Why B is correct
Per NEETS Mod. 5 §2-2, a shunt motor runs at nearly constant speed from no load to full load and gives moderate starting torque, making it suitable for driving pumps, fans, and machine tools where steady speed matters. A series motor has widely varying speed with load and must never be run unloaded.
Cited:NEETS Mod. 5 §2-2