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- Question 1 of 20
1. Question
The proper number of ampere-turns for a given test specimen is determined by:
- Question 2 of 20
2. Question
A circular field may be induced into a specimen by:
- Question 3 of 20
3. Question
In longitudinal magnetization, the proper term for calculating magnetizing force is:
- Question 4 of 20
4. Question
Why is it preferable to disassemble parts before magnetic particle inspection?
- Question 5 of 20
5. Question
Fluorescent magnetic particle indications should be inspected under:
- Question 6 of 20
6. Question
Welded plate of 25 mm thickness with prods, what minimum current shall be required to satisfactory inspection with prod spacing of 150 mm?
- Question 7 of 20
7. Question
What are the three causes of nonrelevant indications?
- Question 8 of 20
8. Question
A defect open to the surface produces an indication that is:
- Question 9 of 20
9. Question
What equipment is used to determine whether a part has been demagnetized?
- Question 10 of 20
10. Question
Why should parts be cleaned after demagnetization?
- Question 11 of 20
11. Question
The maximum spacing between prods for the best sensitivity is ________________________.
- Question 12 of 20
12. Question
An article has been circularly magnetized and retains a circular residual field. To replace the circular field with a longitudinal field, we longitudinally magnetize the article with a field that is as great or greater than:
- Question 13 of 20
13. Question
Whenever an article has been circularly magnetized, the first step in the demagnetization procedures is to establish:
- Question 14 of 20
14. Question
When a round steel bar is magnetized by passing alternating current through its length, flux density is:
- Question 15 of 20
15. Question
Surface seams in rolled bars are best detected in magnetic particle testing with:
- Question 16 of 20
16. Question
A test object 10 inches (25cm) long and 2 inches (5 cm) in diameter , longitudinally magnetized in a 5-turn coil, requires a magnetizing current of: (NI = 45 000 / (L/D))
- Question 17 of 20
17. Question
The only test method to use on articles made of soft steel with low retentivity is the ___________________ method.
- Question 18 of 20
18. Question
When defects have been removed from an article, or have been repaired, the next step is to _________________________ the article.
- Question 19 of 20
19. Question
When two pieces of steel rub against each other and either or both are in a magnetized condition, an indication is sometimes formed when magnetic particles are applied. This type of indications is called:
- Question 20 of 20
20. Question
When magnetizing with the central conductor, how many amperes would be required to circularly magnetize a hollow tube with an outside diameter of 2 inches (5 cm)?
