USCG Exam PracticeElectrical fundamentals — DC/AC, motors, distribution
Which type of DC motor is best suited for driving a centrifugal pump that requires nearly constant speed from no load to full load?
- A. Series motor, because it provides very high starting torque.
- ✓ Shunt motor, because it runs at nearly constant speed from no load to full load.Correct
- C. Compound motor, because it combines high starting torque with speed regulation.
- D. Series motor, because it maintains constant speed regardless of load.
Why B is correct
A shunt motor runs at nearly constant speed from no load to full load and gives moderate starting torque, making it suitable for pumps and fans where steady speed matters. NEETS Mod. 5 §2-2.
Cited:NEETS Mod. 5 §2-2