Which of the illustrated gauges is capable of measuring vacuums at the micron level for the purpose of proving system dehydration during system evacuation with a vacuum pump, but displays the achieved vacuums at incremental threshold intervals rather than continuously? Illustration GS-RA-37
Official USCG Answer & Rule Citation
Correct Answer: Option B — B
Specific electronic micron gauges utilize threshold LED or bar-graph incremental threshold steps rather than continuous analog needles to indicate deep evacuation vacuum levels required for verifying system moisture removal.
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