Exam 3: Control Units for Switching and Communication

The normal state of a switch shows the contact configuration when the device is being acted upon by an external force.

In the machine tool industry, the assignment of the color amber for a pilot light indicates ____.

Standards have been developed that specify certain colors in push-button switch operators for particular functions. For example, in the machine tool industry, green means "Start Motors, Cycle Start, Initiate Motion."

A push-button requires a pressing force to actuate the contacts. The selector switch requires a(n) ____________________ motion to operate the device.

____ operators are used to start a motion or energize a circuit. Because of the flush head on the operator, the switch cannot be accidentally pressed.

The _____________________ indicating light provides a check on the condition of the bulb.

The visual ____________________ system displays the plant or process status by lighting individual windows identifying process functions.

Multiple contacts may be connected to a single selector switch (SSW).