Questions

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Self Test Unit One                                                                 Marks Scored:         /20

Check your understanding by answering the following questions

1. AC welding machines are generally …………….. transformers.      (2 Marks)
2. The unit for measuring current is ………………….                          (2 Marks)
3. The cooling system of a welding transformer may be either:

a)                  …………………..

b)                  …………………..                                                                        (4 Marks)

4. Explain the term step down transformer as far as machines are concerned.

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………                                    (4 Marks)

5. What is the role of the current regulator?

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….                                    (3 Marks)

6. List FIVE precautions regarding AC transformer.                             (5 marks)