NEIEP 400 course test review (Latest 2025
/ 2026 Update) Questions and Verified
Answers 100% Correct {Grade A}
A transformer has 728 turns on the primary winding and 56 turns on the secondary.
With 120 volts applied on the primary, what is the output voltage on the secondary? -
correct answer 9.23 volts
What is correct regarding current in transformers? -correct answer the current ratio
of transformation is the opposite of the voltage ratio transformation.
A transformer has a primary voltage of 440 voltage with 100 turns and a 15:1 voltage
ratio of transformation. With a primary current of 25 amps, what will be the current in
the secondary? -correct answer 44 amps
What statement best describes eddy currents? -correct answer eddy currents effect
solid cores less than laminated cores.
With the following values Ep=208 vac, Es=35 vac, Ip= 3.8 amps, Is= 21.42 amps, what
is the efficiency of this transformer? -correct answer 96%
Which of the following would describe a transformer with a fixed voltage
transformation ratio of 1:12? -correct answer Step-up transformer
, NEIEP 400 course test review (Latest 2025
/ 2026 Update) Questions and Verified
Answers 100% Correct {Grade A}
Which of the following would describe a transformer with a primary current of 27
amps and a secondary current of one amp? -correct answer step down transformer
How are primary windings on a transformer identified? -correct answer the primary
winding terminals are identified with the letter H
How would you check for an open primary winding? -correct answer measure the
resistance across the primary.
What is true of resistance when a secondary winding is open? -correct answer the
secondary resistance will be infinity.
Which statement applies when a secondary winding is completely shorted? -correct
answer current through the primary is high.
Which statement applies when a secondary winding is partially shorted? -correct
answer current through the secondary is low.
The direction of the magnetic field around a wire when electron current flows
through it can be determined by ________________? -correct answer The left hand rule.
, NEIEP 400 course test review (Latest 2025
/ 2026 Update) Questions and Verified
Answers 100% Correct {Grade A}
What are naturally magnetic materials called? -correct answer Ferromagnetic
What is the direction of electron current flow? -correct answer negative to positive.
What is the output of an elementary generator called? -correct answer Alternating
Current
What is the action in the elementary DC generator of converting AC to DC called? -
correct answer Commutation
More coils and commutator segments are added to the elementary DC generator
Armature in order to help it do what? -correct answer Reduce Ripple
What happens if more turns are added to each armature coil in a DC generator? -
correct answer Increased voltage output
If a current carrying wire is placed perpendicular to a field created by two magnets of
opposite polarity what happens? -correct answer The conductor is moved at right
angles to the flux of the magnetic poles.
/ 2026 Update) Questions and Verified
Answers 100% Correct {Grade A}
A transformer has 728 turns on the primary winding and 56 turns on the secondary.
With 120 volts applied on the primary, what is the output voltage on the secondary? -
correct answer 9.23 volts
What is correct regarding current in transformers? -correct answer the current ratio
of transformation is the opposite of the voltage ratio transformation.
A transformer has a primary voltage of 440 voltage with 100 turns and a 15:1 voltage
ratio of transformation. With a primary current of 25 amps, what will be the current in
the secondary? -correct answer 44 amps
What statement best describes eddy currents? -correct answer eddy currents effect
solid cores less than laminated cores.
With the following values Ep=208 vac, Es=35 vac, Ip= 3.8 amps, Is= 21.42 amps, what
is the efficiency of this transformer? -correct answer 96%
Which of the following would describe a transformer with a fixed voltage
transformation ratio of 1:12? -correct answer Step-up transformer
, NEIEP 400 course test review (Latest 2025
/ 2026 Update) Questions and Verified
Answers 100% Correct {Grade A}
Which of the following would describe a transformer with a primary current of 27
amps and a secondary current of one amp? -correct answer step down transformer
How are primary windings on a transformer identified? -correct answer the primary
winding terminals are identified with the letter H
How would you check for an open primary winding? -correct answer measure the
resistance across the primary.
What is true of resistance when a secondary winding is open? -correct answer the
secondary resistance will be infinity.
Which statement applies when a secondary winding is completely shorted? -correct
answer current through the primary is high.
Which statement applies when a secondary winding is partially shorted? -correct
answer current through the secondary is low.
The direction of the magnetic field around a wire when electron current flows
through it can be determined by ________________? -correct answer The left hand rule.
, NEIEP 400 course test review (Latest 2025
/ 2026 Update) Questions and Verified
Answers 100% Correct {Grade A}
What are naturally magnetic materials called? -correct answer Ferromagnetic
What is the direction of electron current flow? -correct answer negative to positive.
What is the output of an elementary generator called? -correct answer Alternating
Current
What is the action in the elementary DC generator of converting AC to DC called? -
correct answer Commutation
More coils and commutator segments are added to the elementary DC generator
Armature in order to help it do what? -correct answer Reduce Ripple
What happens if more turns are added to each armature coil in a DC generator? -
correct answer Increased voltage output
If a current carrying wire is placed perpendicular to a field created by two magnets of
opposite polarity what happens? -correct answer The conductor is moved at right
angles to the flux of the magnetic poles.
