What is the resistance reading at "1" on the megger scale illustrated in figure "A"? EL-0044
Official USCG Answer & Rule Citation
Correct Answer: Option D — 150 megohms
Megohmmeter scale graduations follow a logarithmic progression. Reading calibration marks at position "1" against the instrument multiplier scale yields a precise insulation resistance value of 150 megohms, crucial for evaluating winding health under 46 CFR Subchapter J testing mandates.
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