A. Liquid-immersed water-cooling
B. Liquid-immersed self-cooling
C. Air-blast cooling
D. Self-air cooling
3-19. This transformer has a cooling method
that has its coils and core completely
immersed in transformer oil.
IN ANSWERING QUESTIONS 3-16
THROUGH 3-19, REFER TO FIGURE 3A,
AND SELECT THE TRANSFORMER
DESCRIBED IN THE QUESTION.
3-20. Which of the following types of
transformers would you find in a major
3-16. This transformer has a cooling method
that cools by surrounding air at
3-17. This transformer has a cooling method
that has the core and windings encased
in a metal enclosure through which air
is circulated by a blower.
1. Completely self-protected (CSP)
3-21. Old transformers may contain which, if
any, of the following dangerous
3-22. Which of the following safety
precautions will protect you when
handling Askarel® oil?
3-18. This transformer has a cooling method
1. Wearing impermeable gloves
that has water circulated through coils
2. Wearing splashproof goggles
and carries away the heat from the oil
3. Properly ventilating the work space
as it rises in the tank.
4. All of the above
3-23. When removing Askarel® oil that is
contaminated with PCBs, an air
respirator may be necessary,