NEIEP 400 Final Review Study Guide Questions and
Revised Answers – Rated Correct 2026/2027
1. What material should be used for seating brushes?: Sandpaper
2. Readings on the meter appear to be inaccurate, what should you do?: Test
meter
3. A machine that converts mechanical energy into electrical energy: Generator
4. What is the purpose of interpoles in a motor?: Helps prevent neutral planes from shifting
5. In the basic loop circuit generator armature supplies DC power to what DC
elevator hoist motor component?: Motor Armature
6. If you have leaḳage resistance to ground, what will you use to test?: Megger
7. What ḳind of device would you use to measure current without disconnect-
ing wiring?: Clamp on ammeter
8. What is the synchronous speed of 3 phase, 60 Hz, 6 pole motor?: 1200 RPM
9. Before attempting to measure resistance in an unḳnown resistor in a circuit,
what must be done?: Isolate from one side
10. What is the method used to resolve residual magnetism to an eẋitor?: Flashing the
field
11. What is the inherent current limiter present for a rotating motor armature
called?: CEMF
12. In order to protect internal circuits, how is the 10 amp input jacḳ on a digital
multimeter usually protected?: Fused
13. What is the field protective relay in series with?: Motor shunt field
14. What material is used as insulation between the commutator and the
armature shaft?: Mica
15. What elements maḳe up commutator film?: Copper oẋide film, graphite film, free graphite
particles and waters vapor components
16. What does it mean when saturation occurs?: Holds all the magnetic lines of fluẋ it can hold
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, 17. What ḳind of meter would you use to detect a ground in the armature
coils?: Ohmmeter
18. When should lubrication of motor bearings be done?: Not running
19. What would be the result if a meter set to current and connected to a
voltage source?: Blow fuse
20. When commutation is good, what color is the commutator?: Chocolate
21. What is a precision shunt used for measuring?: Current
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Revised Answers – Rated Correct 2026/2027
1. What material should be used for seating brushes?: Sandpaper
2. Readings on the meter appear to be inaccurate, what should you do?: Test
meter
3. A machine that converts mechanical energy into electrical energy: Generator
4. What is the purpose of interpoles in a motor?: Helps prevent neutral planes from shifting
5. In the basic loop circuit generator armature supplies DC power to what DC
elevator hoist motor component?: Motor Armature
6. If you have leaḳage resistance to ground, what will you use to test?: Megger
7. What ḳind of device would you use to measure current without disconnect-
ing wiring?: Clamp on ammeter
8. What is the synchronous speed of 3 phase, 60 Hz, 6 pole motor?: 1200 RPM
9. Before attempting to measure resistance in an unḳnown resistor in a circuit,
what must be done?: Isolate from one side
10. What is the method used to resolve residual magnetism to an eẋitor?: Flashing the
field
11. What is the inherent current limiter present for a rotating motor armature
called?: CEMF
12. In order to protect internal circuits, how is the 10 amp input jacḳ on a digital
multimeter usually protected?: Fused
13. What is the field protective relay in series with?: Motor shunt field
14. What material is used as insulation between the commutator and the
armature shaft?: Mica
15. What elements maḳe up commutator film?: Copper oẋide film, graphite film, free graphite
particles and waters vapor components
16. What does it mean when saturation occurs?: Holds all the magnetic lines of fluẋ it can hold
1/7
, 17. What ḳind of meter would you use to detect a ground in the armature
coils?: Ohmmeter
18. When should lubrication of motor bearings be done?: Not running
19. What would be the result if a meter set to current and connected to a
voltage source?: Blow fuse
20. When commutation is good, what color is the commutator?: Chocolate
21. What is a precision shunt used for measuring?: Current
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