Split Phase AC Motors 14/18
The phases of the three-phase power supplied by the power company are __________ degrees out of phase with each other.
120
The frequency of the AC electricity in most European countries is __________.
50 Hz
The device that is used on a split-phase motor to disconnect the start winding when a predetermined speed has been reached is a __________.
Centrifugal switch
The amount two electrical waveforms are out of phase is measured in __________.
Degrees
Which of the following is an application of a split-phase motor?
Fan Business Machine Centrifugal Pump
Which of the following is an advantage of a split-phase motor?
Is available at a low cost
Which of the following is a type of single-phase AC motor?
Permanent-capacitor Capacitor-start Split-phase
The effective value of AC voltage is also called the __________ voltage.
RMS (Root Mean Square)
Which of the following is not a method that can be used to reverse the rotation of a split-phase motor?
Reverse the power leads
In which of the split-phase motor windings will the current start to flow first?
Start winding Run winding
Which of the following is a category of AC motors?
Three-phase
The rate at which the electrical voltage or current cycle repeats is called __________.
frequency
When two phases of electricity do not start and end at the same time, they are said to be __________.
in-phase
AC electricity flowing in a particular wire is called a __________.
phase
The main set of windings in a split-phase motor is called the __________.
run windings
The waveform that is produced by alternating current looks like a __________.
sine wave
The difference between the synchronous speed and the actual speed at which an AC motor will run is called __________.
slip
The speed at which the rotor/shaft of an AC motor must rotate to exactly match the speed of the rotating magnetic field is called __________.
synchronous speed
