Coast Guard Exams
Question 460Electricity/Electronics - Assistant Engineer70% to pass

The wiring diagram found in figure "A" of the illustration represents what type of DC motor? Illustration EL-0054

Diagram for question 460
AI Explanation
The correct answer is D) shunt wound. The wiring diagram in figure "A" of illustration EL-0054 represents a shunt wound DC motor. In a shunt wound motor, the field winding is connected in parallel (shunt) with the armature winding, allowing the field current to be independent of the armature current. This configuration provides stable speed regulation and is commonly used in applications where a constant speed is required. The other answer choices are incorrect because: A) a series wound motor has the field winding connected in series with the armature winding; B) and C) a compound wound motor has both series and shunt field windings, with the configuration being either long or short shunt.