Week 7 Review

•NEMA standards Include: (all that apply):

• •Electrical voltage and current ratings

• •Dimensions of mounting bolt holes

• •Diameter of motor shaft

• •Distance between center of shaft and mounting plate

–Rotating speed of stator’s magnetic field

• •Synchronous speed

• Symphonic speed

• Symphony speed

• Ludacris speed

•Frequent cause of malfunction of a Split Phase A. C. motor:

• Defective Mother Board

• Defective Resistor

• –Defective Capacitor

• Defective Transistor

•The primary function of the rotor in an A.C. motor:

• •To generate electricity

• To provide mechanical power

• –To convert electrical energy into mechanical energy

• To convert mechanical energy into electrical energy

–The type of motor that operates on both A.C. and D.C.:

• •Universal motor

• Induction motor

• Synchronous motor

• Split phase motor

•The component in an A.C. motor that creates the magnetic field:

• Stator

• •Rotor

• –Armature

• Commutator

•The type of motor that operates only on A.C.:

• •Induction motor

• Universal motor

• Synchronous motor

• Split phase motor

•The component in an A.C. motor that rotates:

• Stator

• •Rotor

• –Armature

• Commutator

•Common cause of malfunction of a Synchronous A. C. motor:

• Defective Mother Board

• Defective Resistor

• –Defective Capacitor

• Defective Transistor

•Types: of motors used in industry:

• wound- rotor

• synchronous

• all of the above

• induction motor