Exam 20: Motor Control Devices and Circuits

Rotary switches are sometimes known as ____ switches.

A(n) ____ is a signaling apparatus that may be audible or visual.

Which object characteristics are most easily detected by a standard diffuse sensor?

Photoelectric switches consist of three basic components: the transmitter, the receiver, and the switching device.

Push buttons may operate on a momentary basis or be mechanically held.

A ____ sensor houses the transmitter and receiver in a single unit.

A capacitive proximity switch cannot sense nonconductive (nonferrous) material.

There are three basic methods of operating a photo switch: thru-beam, retro-reflective, and specular.

____ switches are automatic devices that consist of an actuator, a body, and one or more contact blocks.

The ____ sensor utilizes a focusing lens to create a focal point.

Thru-beam sensing may be used over distances up to ____ feet.

A relay with heavy-duty contacts is called a ____.

There are essentially two different types of motor starters: the standard motor starter and the ____ motor starter.

Photoelectric switches are contact sensors.

Which type of sensor is designed to sense an object but ignore the background?