NEIEP 400 Final Exam Version 1 (Latest 2023/ 2024 Update) Questions and Verified Answers| 100% Correct| Grade A

NEIEP 400 Final Exam Version 1 (Latest 2023/ 2024 Update) Questions and Verified Answers| 100% Correct| Grade A Q: What is the power available from a 68 kVA transformer connected in open delta configuration ? Answer: 39.44 kVA Q: The secondary winding of an 11,000 volt to 220 volt transformer has 50 windings on the secondary How many turns are on the primary winding ? Answer: 2500 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: A transformer has a primary voltage of 440 V with 100 turns and a 15:1 voltage ratio of transformation . With a primary current of 25 amps , what is the current in the secondary ? Answer: 375 amps Q: Which statement best describes eddy currents ? Answer: They are circulating cur- rents set up by magnetic induction . 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: 95 % 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 1 amp ? Answer: Step - down transformer Q: Which statement is correct regarding transformers? Answer: The primary winding terminals are identified with the letter H Q: Refer to the figure . What type of transformer is represented? Answer: Core type with a wye primary and delta secondary Q: Which would you do to check for an open primary winding ? Answer: Measure the resistance across the primary