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A(n) ___ protects the transformer from elements and, at the same time, must allow the heat from the transformer to dissipate.

If there is no change in the pressure gauge reading on a transformer when the oil temperature changes, a(n) ___ may be present above the oil level in the tank.

The ___ of an insulation liquid is a measure of the ability of the oil to withstand electrical stress.

Three single-phase transformers are sometimes used to connect to a 3-phase circuit but they are much more expensive to replace in the case of failure than a common-core 3-phase unit.

_____ is produced when an arc occurs under the liquid inside a transformer.

Mineral oil is subject to oxidation that degrades the oil and results in ___ buildup.

An insulation power factor value _____ is generally considered to be a sign of adequate insulation.

Transformer ___ protection is required to protect the primary windings from short circuits and overloads and the secondary windings from overloads.

A(n) ___ is a transformer that has all or part of the windings shared by the primary and secondary.

Transformers and transformer vaults shall be installed in locations that are ___ to qualified personnel.