National Elevator Industry Educational Program 400 Key concepts and Definitions
review
1200 rpm - ansWhat is the synchronous speed of 3 phase, 60 Hz, 6 pole motor?
Blow fuse - ansWhat would be the result if a meter set to current and connected to a voltage source?
CEMF - ansWhat is the inherent current limiter present for a rotating motor armature called?
Chocolate - ansWhen commutation is good, what color is the commutator?
Clamp on ammeter - ansWhat kind of device would you use to measure current without disconnecting wiring?
Copper oxide film, graphite film, free graphite particles and waters vapor components - ansWhat elements
make up a proper commutator film?
Current - ansWhat is a precision shunt used for measuring?
Flashing the field - ansWhat is the method used to resolve residual magnetism to an exitor?
Fused - ansIn order to protect internal circuits, how is the 10 amp input jack on a digital multimeter usually
protected?
Generator - ansA machine that converts mechanical energy into electrical energy
Help prevent neutral plains from shifting - ansWhat is the purpose of interpoles in a motor?
high resistance - ansWhat should resistance of an armature be when measured from commutator to ground
with brushes removed?
review
1200 rpm - ansWhat is the synchronous speed of 3 phase, 60 Hz, 6 pole motor?
Blow fuse - ansWhat would be the result if a meter set to current and connected to a voltage source?
CEMF - ansWhat is the inherent current limiter present for a rotating motor armature called?
Chocolate - ansWhen commutation is good, what color is the commutator?
Clamp on ammeter - ansWhat kind of device would you use to measure current without disconnecting wiring?
Copper oxide film, graphite film, free graphite particles and waters vapor components - ansWhat elements
make up a proper commutator film?
Current - ansWhat is a precision shunt used for measuring?
Flashing the field - ansWhat is the method used to resolve residual magnetism to an exitor?
Fused - ansIn order to protect internal circuits, how is the 10 amp input jack on a digital multimeter usually
protected?
Generator - ansA machine that converts mechanical energy into electrical energy
Help prevent neutral plains from shifting - ansWhat is the purpose of interpoles in a motor?
high resistance - ansWhat should resistance of an armature be when measured from commutator to ground
with brushes removed?
