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A rupture disc can be used as a pressure relief device and typically consists of a thin layer of rubber mounted in a disc holder.

All transformers generate heat.

An insulation resistance test is a test performed to measure the ___ through the coil insulation.

The primary mechanisms for the breakdown of insulating fluids are heat and contamination.

A ___ installation is an electrical installation in which the conditions of maintenance are such that only qualified persons monitor or service the electrical equipment.

A transformer rated for operation at 25 Hz can be directly replaced with one rated at 60 Hz.

When a third unit is added to an open delta transformer configuration to close the delta, each transformer can only deliver 75% of its rated capacity.

Variable control transformers can be used with buck-boost transformers to create a(n) ___ regulation system.

Ground connections should be inspected regularly for ___ connections.

Control transformers for HVAC systems are usually rated 120 V or 240 V on the primary and ___ V on the secondary.