How may temporary repairs to an open DC propulsion armature coil be made, allowing continued operation until permanent repairs can be made?

Correct Answer: Option A — disconnecting coil ends, insulating each, and short circuiting the two commutator bars

Disconnecting the damaged coil ends, insulating them from ground, and jumpering the corresponding commutator bars maintains a complete series armature circuit path, bypassing the faulted coil temporarily until permanent shipyard rewinding can occur.