NEIEP 400 LATEST 2026 EXAM QUESTIONS AND
SOLUTIONS GRADED A+
✔✔Which motor uses a stator to act as a rotating field? - ✔✔
✔✔AC induction motor - ✔✔
✔✔How do you restore magnetism to an exciter? - ✔✔Flashing the field (battery)
✔✔What circuit is used for preventing build-up of circulating current when the generator
field is de-energized? - ✔✔Suicide
✔✔What color should a commutator be? - ✔✔Chocolate brown
✔✔Do you have to disconnect wires when using a clamp on meter? - ✔✔No
✔✔What are the 4 things that make up the commutator film? - ✔✔-copper oxide
-water vapor
-graphite particles
-graphite film
✔✔What is the action in the elementary DC generator of converting AC to DC called? -
✔✔Commutation
✔✔Brush holders should be positioned no more than what distance above the
commutator? - ✔✔3/32"
✔✔What is the field protective relay in series with? - ✔✔Safety circuit
✔✔What can you use to detect a ground in armature coils? - ✔✔Ohms meter
✔✔What method of armature windings would you use for high current application? -
✔✔Lap windings
✔✔What converts mechanical energy to electrical energy? - ✔✔Generator
✔✔What is the result of current flowing through a field coil of a DC generator to provide
a magnetic field called? - ✔✔Excitation
✔✔Basic loop circuit, the generator armature supplies the DC power to what DC
elevator hoist motor component? - ✔✔Motor armature
SOLUTIONS GRADED A+
✔✔Which motor uses a stator to act as a rotating field? - ✔✔
✔✔AC induction motor - ✔✔
✔✔How do you restore magnetism to an exciter? - ✔✔Flashing the field (battery)
✔✔What circuit is used for preventing build-up of circulating current when the generator
field is de-energized? - ✔✔Suicide
✔✔What color should a commutator be? - ✔✔Chocolate brown
✔✔Do you have to disconnect wires when using a clamp on meter? - ✔✔No
✔✔What are the 4 things that make up the commutator film? - ✔✔-copper oxide
-water vapor
-graphite particles
-graphite film
✔✔What is the action in the elementary DC generator of converting AC to DC called? -
✔✔Commutation
✔✔Brush holders should be positioned no more than what distance above the
commutator? - ✔✔3/32"
✔✔What is the field protective relay in series with? - ✔✔Safety circuit
✔✔What can you use to detect a ground in armature coils? - ✔✔Ohms meter
✔✔What method of armature windings would you use for high current application? -
✔✔Lap windings
✔✔What converts mechanical energy to electrical energy? - ✔✔Generator
✔✔What is the result of current flowing through a field coil of a DC generator to provide
a magnetic field called? - ✔✔Excitation
✔✔Basic loop circuit, the generator armature supplies the DC power to what DC
elevator hoist motor component? - ✔✔Motor armature
