Materials and Processes Flashcards
Magnetic particle inspection is used primarily to detect…
Flaws on or near the surface.
Liquid penetrant inspection methods may be used on which of the following?
Ferrous and nonferrous metals and nonporous plastics.
Which of these nondestructive testing methods is suitable for the inspection of most metals, plastics, and ceramics for surface and subsurface defects?
Ultrasonic inspection
Which of these nondestructive testing methods is suitable for the inspection of most metals, plastics, and ceramics for surface and subsurface defects?
Ultrasonic Inspection.
Which of the following defects are not acceptable for metal lines?
Dents in straight section that are 20% of tube diameter.
What nondestructive testing method requires little or no part preparation, is used to detect surface or near-surface defects in most metals, and may also be used to separate metals or alloys and their heat-treated conditions?
Eddy current inspection.
What method of magnetic particle inspection is used most often to inspect aircraft parts for invisible cracks and other defects?
Continuous.
Which of the following factors are considered essential knowledge for X-ray exposure?
Material thickness and density and the type of defect to be detected.
The testing medium that is generally used in magnetic particle inspection utilizes a ferromagnetic material that has…
High permeability and low retentivity
Which statement relating to the residual magnetizing inspection method is true?
It may be used with steels which have been heat treated for stressed applications.
A mechanic has completed a bonded honeycomb repair using the potted compound repair technique. What nondestructive testing method is used to determine the soundness of the repair after the repair has cured?
Metallic ring test.
What two types of indicating mediums are available for magnetic particle inspection?
Wet and dry process materials.
Which of the following materials may be inspected using the magnetic particle inspection method?
Iron alloys.
One way a part may be demagnetized after magnetic particle inspection is by…
Slowly moving the part out of an AC magnetic field of sufficient strength.
Which type crack can be detected by magnetic particle inspection using either circular or longitudinal magnetization?
45 DEGREES.
Which of the following methods may be suitable to use to detect cracks open to the surface in aluminum forgings and castings?
Dye penetrant inspection and eddy current inspection.
To detect a minute crack using dye penetrant inspection usually requires…
A longer-than-normal penetrating time.
Which of the following is a main determinant of the dwell time to use when conducting a dye or fluorescent penetrant inspection?
The size and shape of the discontinuities being looked for.
When checking an item with the magnetic particle method, circular and longitudinal magnetization should be used to…
Reveal all possible defects.
In magnetic particle inspection, a flaw that is perpendicular to the magnetic field flux lines generally causes…
A large disruption in the magnetic field.
If dye penetrant inspection indicators are not sharp and clear, the most probable cause is that the part…
Was not thoroughly washed before the developer was applied.
(1) An aircraft part may be demagnetized by subjecting it to a magnetizing force from alternating current that is gradually reduced in strength
(2) An aircraft part may be demagnetized by subjecting it to a magnetizing force from direct current that is alternately reversed in direction and gradually reduced in strength.
Regarding the above statements,
Both 1 and 2 are true.
The pattern for an inclusion is a magnetic particle buildup forming…
Parallel lines.
A part which is being prepared for dye penetrant inspection should be cleaned with…
A volatile petroleum-base solvent.
Under magnetic particle inspection, a part will be identified as having a fatigue crack under which condition?
The discontinuity is found in a high stressed area of the part.
In performing a dye penetrant inspection, the developer…
Acts as a blotter to produce a visible inspection.
What defects will be detected by magnetizing a part using continuous longitudinal magnetization with a cable?
Defect perpendicular to the long axis of the part.
Circular magnetization of a part can be used to detect which of the defects?
Defects parallel to the long axis of the part.
(1) In nondestructive testing, a discontinuity may be defined as an interruption in the normal physical structure or configuration of a part.
(2) A discontinuity may or may not affect the usefulness of a part.
Regarding the above statements,
Both 1 and 2 are true.
What type of corrosion may attack the grain boundaries of aluminum alloys when the heat treatment process has been improperly accomplished?
Intergranular.
Which of the following describe the effects of annealing steel and aluminum alloys?
Decreasing internal stresses and softening of the metal.
Which heat-treating process of metal produces a hard, wear resistant surface over a strong, tough core?
Case hardening.
Which heat-treating operation would be performed when the surface of the metal is changed chemically by introducing a high carbide or nitride content?
Case hardening.
Normalizing is a process of heat treating…
Iron-base metals only.
Which of the following occurs when a mechanical force as rolling, hammering, or bending is repeatedly applied to most metals at room temperature?
The metals become strain or work hardened or cold worked.
The reheating of a heat treated metal, such as with a welding torch…
Can significantly alter a metal’s properties in the reheated area.