Mon Test 2 Flashcards
Voltage rating of a replacement capacitor should be
Equal to or greater than
The microfarad rating of a start capacitor should be
Equal to but not greater than 20%
The microfarad rating for a replacement run capacitor should be
Voltage rating needed plus or minus 10%
What is the purpose of a start capacitor
Increase torque
What is the purpose of a run capacitor
Increase efficiency and to give phase shift
Which capacitor has heat dissipating capabilities
Run capacitor
What is the purpose of a bleed resistor
Reduce contact arcing
Which type of capacitor is encased in plastic
Start capacitor
How would a faulty run capacitor affect the operation of a motor
May not start / high running amps
What are the symptoms of an open start capacitor start motor
Will not start
What is torque
The strength that a motor produces by turning
What part does polarity play in the operation of a motor
Rotation
What part of the motor produces an inductive magnetic field within itself to facilitate the rotating motion
Squirrel cage rotor
Which winding has most resistance?
Start
When checking the capacitor with an analog ohmmeter
Needle to Right of scale and back to infinity = _____
Needle 0 ohms = ____
Needle does not move = ___
Good
Short
Open
Which is not a characteristic of a shaded pole motor
Start winding
Which is not a characteristic of a split phase motor
High torque
Which is not a characteristic of a PSC (permanent split capacitor)
Start capacitor
Which is not a characteristic of a CSCR motor (capacitor start capacitor run)
Centrifugal switch or low to medium torque
A start winding of a CSR motor remains in the circuit. True or false
False
Start winding of a PSC(permanent split capacitor) remains in the circuit continuously. True or false
True
What is the stationary part of a motor
Stator
What is the rotating part of a motor
Rotor
What determines the RPMs of a motor
Number of poles
The shaded pole motor is used on pumps or small hermetic compressors. True or false
False
Which motor would be used on small propeller fans
Shaded pole
What is the main cause of motor failure
Heat or dirt
