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The turns ratio is the ratio of the 10 min reading to the 1 min reading taken on a dielectric absorption test.

In general, the transformer enclosure for transformers installed outdoors shall be weatherproof and constructed so that exposure to weather does not interfere with transformer operation.

It is unnecessary to inspect and test a transformer before installation and before it is energized for the first time.

A hipot tester is a test instrument that can be used to evaluate insulation resistance by measuring the pressure in the transformer tank.

Noting the appearance, smell, and sound of a transformer is vital to a good inspection.

When replacing a 25 Hz transformer, two transformers with a(n) ___ rating matching the 25 Hz transformer can be connected in series.

Because industrial loads may cause power quality problems, industrial facilities may want to isolate their ___ loads from their industrial loads.

Dust buildup on a transformer can cause catastrophic failures.

Relays are protective devices that take a transformer off-line in the event of a(n) ___.

The actual value of the insulation resistance at a given time is less important than the trend over time.