A material with a wider hysteresis loop has: Higher reluctance Higher permeability Lower retentivity All of the above Since all matter is composed of atoms: All parts can be tested with MPI if they are heated to their curie temperature All materials can be tested with a MPI regardless of temperature All materials are affected in some way by a magnetic field None of the above Faraday’s Law of Magnetic Induction states that: The flow of electrons can be used to generate a magnetic field The magnetic forces of the material's electrons will be affected by an external magnetic field Iron filings can be used to produce an indication of a flaw Flux leakage is the byproduct of magnetic fields when testing aluminum alloys. A material with a narrower hysteresis loop has:
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Higher permeability Lower retentivity Lower coercivity All of the above
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A circular magnetic field has lines of force that run: Parallel to the long axis of the part 90 degrees to the long axis of the part Circumferentially around the perimeter of the part Opposite the waveform of the magnetic particle machine used
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Which of the following has a large susceptibility to magnetic field? Ferromagnetic materials Diamagnetic materials Paramagnetic materials None of the above
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When a ferromagnetic material is in a unmagnetized state, the domains are: Aligned in a north and south direction Aligned in a east and west direction Randomly organized
Balanced to produce a gauss rating of 2 The magnetic flux density that remains in the material when the magnetizing force is zero is called: Retentivity Residual magnetism Coercive force Permeability
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A property of a material that describes the ease with which a magnetic flux is established in a component is called: Retentivity Residual magnetism Coercive force Permeability
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A material with a narrower hysteresis loop has: Higher reluctance Lower coercivity
Higher retentivity
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All of the above When performing a magnetic particle test with a coil, the part should be placed: Along the outside edge the coil Along the inside edge of the coil Centered in the coil
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None of the above The force required to remove the residual magnetism from the material is called the: Inverse force Reciprocal force Coercive force
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Residual force A material with a wider hysteresis loop has: Lower reluctance Lower residual magnetism Higher residual magnetism Higher premeability
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The opposition that a ferromagnetic material shows to the establishment of a magnetic field is called: Retentivity Reluctance Coercive force
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Permeability A material with a wider hysteresis loop has: Lower permeability Higher retentivity Higher coercivity
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All of the above Which type of current flows continuously in one direction at a constant voltage? Direct current Alternating current Rectified alternating current Half wave rectified alternating current
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The central conductor technique is sometimes used because it: Allows large diameter circular parts to be completely inspected with one application of the magnetizing force Produces a longitudinal field in circular parts Establishes a magnetic field that extends from the ID to the OD of a circular part
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None of the above Dry magnetic particles: Cannot be reused Come in only one color Are all of uniform size None of the above
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When using both a circular and longitudinal magnetic field, the circular field is usually established first because: It is more difficult to establish a circular field It is easier to flip the domains of a circular field to a longitudinal field It is easier to measure a longitudinal field None of the above