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 secondaryWith 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 = 208VAC ; 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