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Sensing bulbs typically use a bellows or ____ to open and close contact points as their internal pressure changes.

When a single-phase motor reaches three-fourths of its normal operating speed, ____ closes a potential relay’s contacts.

The temperature or pressure value at which a device ceases operation is its ____.

The term for the present condition in a conditioned space is the ____.

Which type of bimetal device expands or contracts and tilts a mercury switch that serves as the electrical contact between wires?

A(n) ____ element opens an electrical circuit when the temperature rises.

A controlled device that changes an input energy (fluid, thermal, electrical, etc.) into mechanical motion is a(n) ____.

An electrical switch that operates under the control of an outside electrical signal is a ____.

To reduce or eliminate electrical arcing in an electrical control, use ____.

If the low-side pressure drops below a safe limit due to refrigerant loss or an evaporator freeze-up, a(n) ____ switches off the compressor motor.