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1. "Magnetic particle" is a nondestructive examination c) both a and b
method used for:
2. Ferromagnetic material is: c) both a and b
3. The permeability of a material describes the: a) ease with which it can be
magnetised
4. The retentivity of a material describes the: c) ability to retain the mag-
netic field
5. Why are magnetic particles available in different c) both a and b
colours?
6. Which of the following can be magnetised? d) all of the above
7. The magnetic field is strongest when the: b) magnetising current is
flowing
8. If a crack exists in a circular magnet, the attraction of b) leakage field
magnetic particles to the crack is caused by a:
9. The unit usually used to denote flux density is the: a) gauss
10. which statement is true when related to magnetic d) all of the above
lines of force?
11. Magnetic flux lines, which are parallel to discontinuity c) no indications
produce:
12. a part is adaptable to magnetic particle inspection if: b) the material is ferromag-
netic
13. What rule describes the direction of current flow (+ to b) the right hand rule
-) when lines of magnetic force surround a conductor?
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