ASNT MAGNETIC PARTICLE LEVEL III REVIEW
EXAM WITH 170+ QUESTIONS & CORRECT
ANSWERS LATEST 2025
Magnetic particle is a NDE method used for: - ANSWER-Locating surface and
near surface discontinuities in steel
Ferromagnetic material is: - ANSWER-Strongly attracted by a magnetic field
The permeability of a material describes the: - ANSWER-Ease with which it can
be magnetized
The retentivity of a material describes the: - ANSWER-Ability to retain the
magnetic field
Magnetic particles are available in different colors - ANSWER-for color contrast with the part surface thereby enhancing detection of the indications
The magnetic field is strongest when the: - ANSWER-magnetizing current is
flowing
If a crack exists in a circular magnet, the attraction of magnetic particles to the
crack is caused by a: - ANSWER-Leakage field
The unit usually used to denote flux density is: - ANSWER-Tesla
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Magnetic lines of force are most dense: - ANSWER-At the poles of a magnet
Magnetic Flux lines that are parallel to a discontinuity produce - ANSWER-No indication
A part is susceptible to magnetic particle inspection if: - ANSWER-The material is ferromagnetic
What rule describes the direction of flow (+ to -) when magnetic lines of force surround a conductor? - ANSWER-Right Hand Rule
The magnitude of the residual magnetic field in a specimen is dependent on the: - ANSWER-Strength of the applied magnetizing force
The proper number of ampere-turns for a given test specimen being examined by
longitudinal magnetism is determined by: - ANSWER-Its length and diameter
A circular field may be induced into a specimen by: - ANSWER-Passing current
directly through the part
An electrical yoke produces: - ANSWER-A longitudinal field
An energized coil around the part produces: - ANSWER-A longitudinal field
In longitudinal magnetism the proper term for calculating magnetizing force is: - ANSWER-Ampere-turns
Magnetic lines of force: - ANSWER-Form a closed loop 2 / 3
A magnetic particle buildup from a discontinuity is strongest when the
discontinuity is orientated: - ANSWER-90° to the magnetic flux flow
The end of the magnet at which the lines of flux are thought of as entering the bar
is: - ANSWER-The South pole
Materials that are strongly attracted to a magnet are called: - ANSWER-
Ferromagnetic
In mag particle inspection, it is best to: - ANSWER-Make sure the parts meet the specified acceptance criteria
The magnetic domains in a permanent magnet are aligned in: - ANSWER-Fixed
positions, predominantly in one direction
A material that is repelled by magnetism is: - ANSWER-Diamagnetic
Materials weakly attracted by magnetic fields are: - ANSWER-Paramagnetic
Mag Particle inspection methods are recognized as superior to liquid penetrant
techniques when: - ANSWER-Surfaces are anodized or painted
What magnetic property does a paramagnetic material possess? - ANSWER-It is slightly magnetic
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