700 NEIEP FINAL REVIEW ACTUAL EXAM Questions with
Correct Answers (Grade A+)
Question 1: Which of the following describes the most useful feature of the clamp - on ammeter ?
Answer: Does not require that connections be disturbed
Question 2: Which of the following devices is an example of a reactive component that can store energy
for long periods of time causing an electrical hazard even with power removed ?
Answer: Capacitor
Question 3: What must be done when testing a resistance to avoid false readings caused by parallel
circuit paths ?
Answer: Remove one of the two wires to the item being tested
Question 4: A minus sign in front of a reading of the digital voltmeter indicates which of the following ?
Answer: The positive lead is connected to the negative source
Question 5: Which of the following statements best describes CEMF ?
Answer: Opposes the applied voltage .
Question 6: Refer to the figure . What will be the phase relationship between the primary and
secondary voltages ?
Answer: The secondary voltage will be 180 ° out of phase .
Question 7: 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
Question 8: What is the power available from a 68 kVA transformer connected in open delta
configuration ?
Answer: 39.44 kVA
Question 9: 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
Page 1
, Question 10: 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
Question 11: 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
Question 12: Which statement best describes eddy currents ?
Answer: They are circulating currents set up by magnetic induction .
Question 13: 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 %
Question 14: Which of the following would describe a transformer with a fixed voltage transformation
ratio of 1:12 ?
Answer: Step - up transformer
Question 15: 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
Question 16: Which statement is correct regarding transformers?
Answer: The primary winding terminals are identified with the letter H
Question 17: Refer to the figure . What type of transformer is represented ?
Answer: Core type with a wye primary and delta secondary
Question 18: Which would you do to check for an open primary winding ?
Answer: Measure the resistance across the primary
Question 19: Which statement applies when a secondary winding is completely shorted ?
Answer: Current through the primary is high
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Correct Answers (Grade A+)
Question 1: Which of the following describes the most useful feature of the clamp - on ammeter ?
Answer: Does not require that connections be disturbed
Question 2: Which of the following devices is an example of a reactive component that can store energy
for long periods of time causing an electrical hazard even with power removed ?
Answer: Capacitor
Question 3: What must be done when testing a resistance to avoid false readings caused by parallel
circuit paths ?
Answer: Remove one of the two wires to the item being tested
Question 4: A minus sign in front of a reading of the digital voltmeter indicates which of the following ?
Answer: The positive lead is connected to the negative source
Question 5: Which of the following statements best describes CEMF ?
Answer: Opposes the applied voltage .
Question 6: Refer to the figure . What will be the phase relationship between the primary and
secondary voltages ?
Answer: The secondary voltage will be 180 ° out of phase .
Question 7: 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
Question 8: What is the power available from a 68 kVA transformer connected in open delta
configuration ?
Answer: 39.44 kVA
Question 9: 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
Page 1
, Question 10: 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
Question 11: 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
Question 12: Which statement best describes eddy currents ?
Answer: They are circulating currents set up by magnetic induction .
Question 13: 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 %
Question 14: Which of the following would describe a transformer with a fixed voltage transformation
ratio of 1:12 ?
Answer: Step - up transformer
Question 15: 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
Question 16: Which statement is correct regarding transformers?
Answer: The primary winding terminals are identified with the letter H
Question 17: Refer to the figure . What type of transformer is represented ?
Answer: Core type with a wye primary and delta secondary
Question 18: Which would you do to check for an open primary winding ?
Answer: Measure the resistance across the primary
Question 19: Which statement applies when a secondary winding is completely shorted ?
Answer: Current through the primary is high
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