NEIEP 400 Final Review/ 78 Questions with
Certified Solutions
What material should be used for seating brushes? - Answer: Sandpaper
Readings on the meter appear to be inaccurate, what should you do? - Answer: Test meter
A machine that converts mechanical energy into electrical energy - Answer: Generator
0.790 MΩ indicates? - Answer: 790 kΩ
AC voltage on a voltmeter is always indicated as? - Answer: RMS
, 0 on voltmeter when testing a known power source indicates? - Answer: Internal fuse is blown
.250 MΩ indicates? - Answer: 250,000 MΩ
What should resistance of a motor or generator commutator be to ground with the brushes raised? -
Answer: Infinite Resistance
2230Ω can also be expressed as? - Answer: 2.23 kΩ
Applied voltage on the primary leads current by? - Answer: 90°
CEMF can best be described as? - Answer: Opposes applied voltage
Eddy currents can be described as? - Answer: Circulating currents set up by magnetic induction
a 1:12 fixed voltage transformation ratio transformer is? - Answer: Step-up
How would you check for an open primary winding? - Answer: Measure resistance across the primary
If the secondary winding is open what will happen to the secondary resistance? - Answer: It will be
infinity
When the secondary winding is completely shorted what happens to primary current? - Answer: Current
is high
How can you reduce ripple? - Answer: More coils and commutator segments
If current carrying wire is placed perpendicular to a field by two magnets of opposite polarity what
happens? - Answer: Conductor is moved at right angles to the flux from the magnetic poles
Certified Solutions
What material should be used for seating brushes? - Answer: Sandpaper
Readings on the meter appear to be inaccurate, what should you do? - Answer: Test meter
A machine that converts mechanical energy into electrical energy - Answer: Generator
0.790 MΩ indicates? - Answer: 790 kΩ
AC voltage on a voltmeter is always indicated as? - Answer: RMS
, 0 on voltmeter when testing a known power source indicates? - Answer: Internal fuse is blown
.250 MΩ indicates? - Answer: 250,000 MΩ
What should resistance of a motor or generator commutator be to ground with the brushes raised? -
Answer: Infinite Resistance
2230Ω can also be expressed as? - Answer: 2.23 kΩ
Applied voltage on the primary leads current by? - Answer: 90°
CEMF can best be described as? - Answer: Opposes applied voltage
Eddy currents can be described as? - Answer: Circulating currents set up by magnetic induction
a 1:12 fixed voltage transformation ratio transformer is? - Answer: Step-up
How would you check for an open primary winding? - Answer: Measure resistance across the primary
If the secondary winding is open what will happen to the secondary resistance? - Answer: It will be
infinity
When the secondary winding is completely shorted what happens to primary current? - Answer: Current
is high
How can you reduce ripple? - Answer: More coils and commutator segments
If current carrying wire is placed perpendicular to a field by two magnets of opposite polarity what
happens? - Answer: Conductor is moved at right angles to the flux from the magnetic poles
