Exam 7: Relays

Starters, contactors, and ______are similar in construction and operation.

Solid-state relays generally apply 3 to__________ volts DC to the input to control the operation of the relay.

Relays are used more often to open and close control circuits than to operate power circuits.

Most of the relays used in machine tool control have double-break contacts.

The greatest advantage of relays with mechanical contacts is that they are resistant to shock and vibration.

Magnetic relays are affected by the electric noise and the voltage spikes induced in the system.

Control magnetic relays are used to control small loads.

One method of eliminating noise and voltage spikes is to use a_____________ .

When the moving element of the thermostat control touches the closed contact, the relay closes and ____________.

Solid-state relays intended to control the operation of AC loads use an electronic device called a_____________ to connect the load to the line.