NETA ETT Level 3 Practice Questions - NETA ETT Level 3 Certified Electrical Testing Technician Exam

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A transformer dissolved gas analysis (DGA) reports the following gases. Which combination suggests active arcing inside the transformer per IEEE C57.104?

High CO and CO2 with low H2 High acetylene (C2H2) with elevated hydrogen (H2) Low methane only Oxygen and nitrogen only

Correct Answer:

High acetylene (C2H2) with elevated hydrogen (H2)

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