NEIEP 400 Final Review: Questions &
Answers
What material should be used for seating brushes?
(Ans- Sandpaper
Readings on the meter appear to be inaccurate, what should you do?
(Ans- Test meter
A machine that converts mechanical energy into electrical energy
(Ans- Generator
What is the purpose of interpoles in a motor?
(Ans- Helps prevent neutral planes from shifting
In the basic loop circuit generator armature supplies DC power to what DC
elevator hoist motor component?
(Ans- Motor Armature
If you have leakage resistance to ground, what will you use to test?
(Ans- Megger
What kind of device would you use to measure current without
disconnecting wiring?
(Ans- Clamp on ammeter
What is the synchronous speed of 3 phase, 60 Hz, 6 pole motor?
(Ans- 1200 RPM
Before attempting to measure resistance in an unknown resistor in a circuit,
what must be done?
(Ans- Isolate from one side
, What is the method used to resolve residual magnetism to an exitor?
(Ans- Flashing the field
What is the inherent current limiter present for a rotating motor armature
called? (Ans- CEMF
In order to protect internal circuits, how is the 10 amp input jack on a digital
multimeter usually protected?
(Ans- Fused
What is the field protective relay in series with?
(Ans- Motor shunt field
What material is used as insulation between the commutator and the
armature shaft?
(Ans- Mica
What elements make up commutator film?
(Ans- Copper oxide film, graphite film, free graphite particles and waters
vapor components
What does it mean when saturation occurs?
(Ans- Holds all the magnetic lines of flux it can hold
What kind of meter would you use to detect a ground in the armature coils?
(Ans- Ohmmeter
When should lubrication of motor bearings be done?
(Ans- Not running
What would be the result if a meter set to current and connected to a
voltage source?
(Ans- Blow fuse
Answers
What material should be used for seating brushes?
(Ans- Sandpaper
Readings on the meter appear to be inaccurate, what should you do?
(Ans- Test meter
A machine that converts mechanical energy into electrical energy
(Ans- Generator
What is the purpose of interpoles in a motor?
(Ans- Helps prevent neutral planes from shifting
In the basic loop circuit generator armature supplies DC power to what DC
elevator hoist motor component?
(Ans- Motor Armature
If you have leakage resistance to ground, what will you use to test?
(Ans- Megger
What kind of device would you use to measure current without
disconnecting wiring?
(Ans- Clamp on ammeter
What is the synchronous speed of 3 phase, 60 Hz, 6 pole motor?
(Ans- 1200 RPM
Before attempting to measure resistance in an unknown resistor in a circuit,
what must be done?
(Ans- Isolate from one side
, What is the method used to resolve residual magnetism to an exitor?
(Ans- Flashing the field
What is the inherent current limiter present for a rotating motor armature
called? (Ans- CEMF
In order to protect internal circuits, how is the 10 amp input jack on a digital
multimeter usually protected?
(Ans- Fused
What is the field protective relay in series with?
(Ans- Motor shunt field
What material is used as insulation between the commutator and the
armature shaft?
(Ans- Mica
What elements make up commutator film?
(Ans- Copper oxide film, graphite film, free graphite particles and waters
vapor components
What does it mean when saturation occurs?
(Ans- Holds all the magnetic lines of flux it can hold
What kind of meter would you use to detect a ground in the armature coils?
(Ans- Ohmmeter
When should lubrication of motor bearings be done?
(Ans- Not running
What would be the result if a meter set to current and connected to a
voltage source?
(Ans- Blow fuse
