High and low pressure cut-in, cut-out, and differential can all be programmed at the controller with ____.

A direct digital control (DDC) system uses multiple inputs and outputs in the form of ____ to operate an HVAC or automated building system.

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

Unlike a contactor, a motor starter is equipped with built-in ____.

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

A ____ relay is operated by the change in current flow through a motor’s run winding.

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

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

The type of fuse that blows immediately after its maximum rating is exceeded is a ____ fuse.

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