TAP Services(865) 919-6674

TAP Services

26307-11 Transformers

1. Refer to the figure above. Which taps should be connected to increase the secondary voltage by 5%?

Question 1 of 25

2. Which of the following types of transformers must be installed in a vault?

Question 2 of 25

3. Capacitors are covered in ________.

Question 3 of 25

4. To ensure maximum safety in a control transformer, the secondary control circuit is ________.

Question 4 of 25

5. Which section of the NEC® contains transformer nameplate requirements?

Question 5 of 25

6. What components are installed to increase the power factor and decrease the cost of electricity caused by large inductive loads?

Question 6 of 25

7. Which of the following refers to the condition in which two circuits share the energy of one of the circuits?

Question 7 of 25

8. A lagging current for a motor or inductive device is represented by a power factor of ________.

Question 8 of 25

9. The NEC® requires that conductors connected to the high leg of a four-wire delta system be color-coded with what color of insulation or tape?

Question 9 of 25

10. A three-phase, four-wire system that has the advantage of providing three-phase power and allowing lighting to be connected between any of the secondary phases and the neutral would have a(n) ________.

Question 10 of 25

11. Which of the following best describes a transformer that increases the voltage on the primary from 120V to 1,200V?

Question 11 of 25

12. The installation of resistors and reactors is covered in ________.

Question 12 of 25

13. Other than surge capacitors or capacitors that are part of another apparatus, the chief use of capacitors is to ________.

Question 13 of 25

14. The secondary voltage in a transformer can be increased or decreased by connecting various ________.

Question 14 of 25

15. Which winding of a transformer is connected to the load?

Question 15 of 25

16. When voltage is stepped down in a transformer, what happens to the current in the same circuit?

Question 16 of 25

17. Most control transformers are ________.

Question 17 of 25

18. Which of the following types of transformers can be ventilated, air-cooled, or sealed?

Question 18 of 25

19. What forces are always present in an AC circuit?

Question 19 of 25

20. What is the voltage of the secondary in a transformer with 200 turns in the primary, 20 turns in the secondary, and an input voltage of 2,400V?

Question 20 of 25

21. To improve the power factor of a circuit that has high inductive reactance, which of the following would be added to the circuit?

Question 21 of 25

22. What type of transformer provides 120V between the center -tapped terminal and each ungrounded terminal on either side and 240V across the full winding of each phase?

Question 22 of 25

23. Refer to the figure above. A multi-tap transformer has 1,620 turns in the primary. There are 40 turns between each tap. Taps 6 and 3 are connected. Which taps must be connected to reduce output voltage by 5%?

Question 23 of 25

24. What type of transformer has more turns in the primary than the secondary?

Question 24 of 25

25. Transformer cores support ________.

Question 25 of 25


 

Our Clients
Mailing List

Sign up for our mailing list today!

FOLLOW US ON SOCIAL MEDIA
 
 
 
 
3d person on book
Quick Nav
TAP Services
(865) 919-6674 phone Contact Us

This site is proudly hosted and designed by Globotech Solutions. All content Copyright © 2026, TAP Services.