Unit 17 Types of electric motors

Two common operating voltages for resident equipment are?

• 115V and 24V

• 115V and 230

• 24V and 230V

• 230V and 277V

When an open motor gets up to speed, the _____ switch takes the start winding out of the circuit.

• Centrifugal

• inverter

• rectifier

• transistor

In a single phase motor, the motor windings that have the highest resistance are the _______ windings

• rotor

• run

• shaft

• start

which of the following devices may be wired into the starting circuit of a motor to improve the starting torque?

• another winding

• start capactor

• thermostat

• centrfugal switch

Which of the following devices may be wired into the running circuit of a motor to improve the running efficiency

• Start capacitor

• Run capacitor

• both start and run

• current relay

the voltage generated by an electric motor's rotor turning within a motor is known as?

• drop out voltage

• pick up voltage

• back electromotive force BEMF

• continuous coil voltage

A _____ motor is manufactured from special materials that are compatible with refrigerants and oils used in a refrigeration system

• hermetic compressor

• open split phase

• single-phase open

• centrifugal pump

Two types of motors that are commonly used for hermetic compressor motors are?

• open split phase and hermetic split phase

• split phase and permanent split capacitor psc

• single-phase open and shaded pole

• shaded pole and split phase

power enters a hermetic compressor shell and passes to the motor inside using?

• insulated motor terminals

• separate motor windings

• DC converters

• start and/or run capactors

Two types of relays that can be used when starting hermetic compressors are ______ relays

• induction and current

• centrifugal and potential

• induction and centrigual

• current and potential