Engine_2014 : Electricity - 860/2299 |
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How may temporary repairs to an open DC propulsion armature coil be made, allowing continued operation until permanent repairs can be made? |
A) connecting the coil ends directly to a pair of negative brushes |
B) disconnecting coil ends, insulating each, and short circuiting the two commutator bars |
C) grounding the coil ends and short circuiting the commutator bar |
D) removing the sparking brushes |
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