USCG USCG Electrical
Set 3 • Question #75 of 142
Launch Interactive Practice Room A shading coil used in an AC magnetic controller, functions to __________.
A
reduce vibration and noise in the contactor
✓ Correct Answer
B
prevent flux buildup in the operating coil
C
eliminate arcing when the contacts close
D
energize the operating coil and 'pull in' the contacts
USCG NMC Regulatory Explanation
In USCG Marine Electrical Systems (IEEE 45 and 46 CFR), regarding 'A shading coil used in an AC magnetic controller, functions to', the compliant technical standard is: 'reduce vibration and noise in the contactor'.
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