NEIEP 400 Final Exam Version 2 (Latest 2024 / 2025 Update) Questions and Verified Answers | 100% Correct | Grade A

NEIEP 400 Final Exam Version 2 (Latest 2024 / 2025 Update) Questions and Verified Answers | 100% Correct | Grade A Q: What is the result of connecting an ammeter to the terminals of a power supply or other voltage source? Answer: The meter will be damaged. Q: What is correct regarding the transformer? Answer: applied voltage on the primary leads current by 90 degrees Q: What does two solid lines between two coils represent in a transformer?- Answer: Iron core transformer Q: What statement best describes CEMF? Answer: it opposes the applied voltage Q: In figure 2 what will be the phase relationship between the primary and secondary voltages? (figure two is a picture of an iron core transformer with one dot to the top left of the iron core symbol and another dot to the bottom right of the core symbol) Answer: The secondary voltage will be 180 degrees out of phase. Q: Which type of transformer would be used to prevent noise from being fed back to the line without changing the voltage levels? Answer: Isolation transformer. Q: What is the power available from a 68Kva transformer connected in open delta configuration? Answer: 39.44 Kva Q: the secondary winding of a 11,000 volt to 220 volt transformer has 50 wind- ings on the secondary. How many turns are on the primary winding? Answer: 2,500 turns Q: 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? Answer: 9.23 volts Q: what is correct regarding current in transformers? Answer: the current ratio of trans- formation is the opposite of the voltage ratio transformation. Q: 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? Answer: 44 amps Q: What statement best describes eddy currents? Answer: eddy currents effect solid cores less than laminated cores. Q: 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? Answer: 96% Q: which of the following would describe a transformer with a fixed voltage transformation ratio of 1:12? Answer: Step-up transformer Q: Which of the following would describe a transformer with a primary current of 27 amps and a secondary current of one amp? Answer: step down transformer Q: how are primary windings on a transformer identified?