Question 402Electricity & Electronics - Assistant Engineer

The correct answer is C) The armature windings are reversed. Reversing the armature windings is the typical method for reversing the direction of motor rotation in electrically operated watertight door controllers. By reversing the armature windings, the direction of the magnetic field created by the armature is flipped, causing the motor to spin in the opposite direction. This allows the watertight door to be opened and closed as needed. The other options are incorrect because reversing the shunt field windings (A) or series field windings (B) would not directly reverse the motor rotation. Reversing both the series field and armature windings (D) would also reverse the rotation, but this is a less common approach compared to just reversing the armature windings.