A Material With a Wider Hysteresis Loop Has

8/10/2019 A Material With a Wider Hysteresis Loop Has

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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

Faradays 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.

13A material with a narrower hysteresis loop has:

Higher permeability

Lower retentivity

Lower coercivity

All of the above

14A 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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15Which of the following has a large susceptibility to magnetic

field?

Ferromagnetic materials

Diamagnetic materials

Paramagnetic materials

None of the above

16When 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

21A 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

22A material with a narrower hysteresis loop has:

Higher reluctance

Lower coercivity


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Higher retentivity

All of the above

25When 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

None of the above

28The force required to remove the residual magnetism from the

material is called the:

Inverse force

Reciprocal force

Coercive force

Residual force

30A material with a wider hysteresis loop has:

Lower reluctance

Lower residual magnetism

Higher residual magnetism

Higher premeability

31The opposition that a ferromagnetic material shows to the

establishment of a magnetic field is called:

Retentivity

Reluctance

Coercive force

Permeability

32A material with a wider hysteresis loop has:

Lower permeability

Higher retentivity

Higher coercivity


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All of the above

42Which type of current flows continuously in one direction at a

constant voltage?

Direct current

Alternating current

Rectified alternating current

Half wave rectified alternating current

43The 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

None of the above

49Dry magnetic particles:

Cannot be reused

Come in only one color

Are all of uniform size

None of the above

50When 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

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A Material With a Wider Hysteresis Loop Has