USCG USCG Electrical
Set 1 • Question #12 of 142
Launch Interactive Practice Room Which of the following precautions should you take when securing propulsion generators and motors for an extended period of time?
A
Disconnect the brush pigtails from their contacts and circulate air through the units.
B
Disconnect the brush pigtails from their contacts and discharge carbon dioxide into the units to keep them dry.
C
Lift the brushes from commutator collector rings and use the built-in heater to prevent moisture accumulation.
✓ Correct Answer
D
Lift the brushes from commutator collector rings and circulate cool dry air through the units.
USCG NMC Regulatory Explanation
In USCG Marine Electrical Systems (IEEE 45 and 46 CFR), regarding 'Which of the following precautions should you take when securing propulsion generators and motors for an extended period of time', the compliant technical standard is: 'Lift the brushes from commutator collector rings and use the built-in heater to prevent moisture accumulation.'.
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