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Guarding can be accomplished by ___.

___ transformers contain no oil and are cooled by circulating air.

Transformers have a noise rating based on the ___ rating.

If the rated primary current of the transformer is less than ___ A, the rating of the OCPD is permitted to be set at not more than 167% of the rated primary current.

A metal oxygen variable (MOV) is a nonlinear resistor that can change resistance with changes in current.

A(n) ___ test between the primary winding and secondary winding can be run to verify that all the windings are wired and operating correctly.

Insulation resistance tests should be conducted at a temperature of ___°F.

Because ___ contain polychlorinated biphenyls, a class of poisonous chemical, they have been banned by the EPA.

The type of electrical system determines the type of transformer required.

When two transformers are connected in parallel with each other, the connection of the two windings makes up a closed ___ circuit.