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The flow switch symbol is used for both liquid and air flow switches.

Magnetic overload relays can be divided into two major types: electronic and ____________________.

Relays and contactors operate on the ____________________ principle.

____________________ show components in their electrical sequence without regard for physical location.

Some common causes of motor overloads are bad ____________________ in either the motor or the load the motor operates.

All solenoids that operate on alternating current must have a(n) ____________________ coil.

What is the voltage on which most magnetic control systems operate?

Contactors are equipped with contacts intended to connect high current loads to the power line; these large contacts are called ____________________ contacts.

Solder melting type overloads are often called solder ____________________ overloads.

The double acting push button has two terminal screws.