NEIEP 400 LATEST VERSION EXAM PREP - VERIFIED
QUESTIONS AND ANSWERS - COMPLETE COVERAGE
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. What is 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 leakage resistance to ground, what will you use to test?
Megger
7. What kind of device would you use to measure current without
disconnecting 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 unknown resistor in a
circuit, what must be done? Isolate from one side
10. What is the method used to resolve residual magnetism to an exciter?
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 jack 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 make up commutator film? Copper oxide film, graphite
film, free graphite particles and water vapor components
16. What does it mean when saturation occurs? Holds all the magnetic lines
of flux it can hold
17. What kind 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
22. On a reversible D.C. door operator motor, what angle is the brush
mounted? Radially, straight up and down
23. What is the significance of the meter specification of ohms per volt?
Internal resistance at specific voltage
24. On the resistance scale of a digital meter, what does the lazy 8 symbol
signify? Infinity
25. When some of the generator output is used to supply the field current
how is the generator described? Self-exciting
26. When the multimeter is set to amps position the test leads are
considered to be in what state? Short circuit
27. What should resistance of an armature be when measured from
commutator to ground with brushes removed? High resistance
28. What method of armature winding is used for high current
applications? Lap winding
29. What should always be done to protect the meter from damage when
measuring unknown voltage? Set to the highest range
30. To what scale should the ammeter be set in order to read a current of
2000 ma? 10 amp
31. What must be done when testing a resistance to avoid readings caused
by parallel circuit paths? Remove one or two of the wire to the item being
tested
QUESTIONS AND ANSWERS - COMPLETE COVERAGE
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. What is 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 leakage resistance to ground, what will you use to test?
Megger
7. What kind of device would you use to measure current without
disconnecting 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 unknown resistor in a
circuit, what must be done? Isolate from one side
10. What is the method used to resolve residual magnetism to an exciter?
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 jack 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 make up commutator film? Copper oxide film, graphite
film, free graphite particles and water vapor components
16. What does it mean when saturation occurs? Holds all the magnetic lines
of flux it can hold
17. What kind 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
22. On a reversible D.C. door operator motor, what angle is the brush
mounted? Radially, straight up and down
23. What is the significance of the meter specification of ohms per volt?
Internal resistance at specific voltage
24. On the resistance scale of a digital meter, what does the lazy 8 symbol
signify? Infinity
25. When some of the generator output is used to supply the field current
how is the generator described? Self-exciting
26. When the multimeter is set to amps position the test leads are
considered to be in what state? Short circuit
27. What should resistance of an armature be when measured from
commutator to ground with brushes removed? High resistance
28. What method of armature winding is used for high current
applications? Lap winding
29. What should always be done to protect the meter from damage when
measuring unknown voltage? Set to the highest range
30. To what scale should the ammeter be set in order to read a current of
2000 ma? 10 amp
31. What must be done when testing a resistance to avoid readings caused
by parallel circuit paths? Remove one or two of the wire to the item being
tested
