AC/DC THEORY CHAPTER 21 TRANSFORMERS UPDATED
ACTUAL QUESTIONS AND CORRECT ANSWERS
Question:
1. Induced currents in an iron core are desirable because they produce heat and power?
Answer:
F
Question:
2. Transformer efficiency is the ratio of the output current to the input current?
Answer:
F
Question:
3. The frequency at which a transformer operates determines its classification?
Answer:
T
Question:
4. A multiple winding transformer has more than four windings on its core?
Answer:
F
Question:
5. One advantage of using an auto transfer rather than other types of power transformers is that current
flow through the windings is reduced?
Answer:
T
Question:
6. Buck-boost Transformers can lower or raise line voltage?
Answer:
T
Question:
7. Voltage across any winding of a transformer has polarity?
Answer:
T
Question:
8. Because core type transformers use more iron in the core than other transformers, they are usually more
expensive?
Answer:
F
ACTUAL QUESTIONS AND CORRECT ANSWERS
Question:
1. Induced currents in an iron core are desirable because they produce heat and power?
Answer:
F
Question:
2. Transformer efficiency is the ratio of the output current to the input current?
Answer:
F
Question:
3. The frequency at which a transformer operates determines its classification?
Answer:
T
Question:
4. A multiple winding transformer has more than four windings on its core?
Answer:
F
Question:
5. One advantage of using an auto transfer rather than other types of power transformers is that current
flow through the windings is reduced?
Answer:
T
Question:
6. Buck-boost Transformers can lower or raise line voltage?
Answer:
T
Question:
7. Voltage across any winding of a transformer has polarity?
Answer:
T
Question:
8. Because core type transformers use more iron in the core than other transformers, they are usually more
expensive?
Answer:
F
