IDA-101-Chapter 10 Contactors Relays and Overloads- Mr.Graham

Front

Which of the following devices is commonly used to control major loads in heating, cooling, and refrigeration systems? Capacitors, Contactors, Limit switches, Transistors

Back

Contactors

Front

A contactor will contain which of the following parts? Armature, Contact, Coil, Contactors contain all of these parts

Back

Contactors contain all of these parts

Front

What part of a contactor slides up and down within slots within the contactor’s frame?

Back

Armature

Front

What is the purpose of the coil on contactors?

Back

Produce magnetism to attract the armature causing the contacts to close

Front

Contactor coils are available for which of the following voltages? 24 volts, 120 volts, 208/240 volts, Coils are available for all the voltages

Back

Coils are available for all the voltages

Front

The part of a contactor that completes the circuit to a load when the contactor is energized is the ___________.

Back

contacts

Front

Which of the following parts, when closing, complete the circuit to the load controlled by the contactor when the coil is energized? Options: Coil, Mechanical linkage, Contacts, Armature

Back

Contacts

Front

Which of the following electrical loads will have a constant amp draw the entire time it is operating?
Compressor motor, Electric resistance heater, Pump motor, Condenser fan motor

Back

Electric resistance heater

Front

Contact points in a contactor are often made of .

Back

Silver-cadmium alloy

Front

Which resistance reading indicates a good contactor coil rated for 24 volts? Options: Zero ohms, Infinite ohms, 15 ohms, None of these are good

Back

15 ohms