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?
A. Ferrous metals and nonporous plastics.
B. Porous and nonporous plastics and nonferrous metals.
C. Ferrous and nonferrous metals and nonporous plastics.
C. 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?
A. Eddy current inspection.
B. Magnetic particle inspection.
C. Ultrasonic inspection.
C. Ultrasonic inspection.
Which of the following defects are not acceptable for metal lines?
A. Scratch or nicks hon the inside of a bend less than 10% of wall thickness.
B. Dents in straight section that are 10% of the tube diameter.
C. Dents in straight section that are 20% of tube diameter.
C. Dents in straight section that are 20% of tube diameter.
What nondestructive testing method requires littles 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?
A. Eddy current inspection.
B. Ultrasonic inspection.
C. Magnetic particle inspection.
A. Eddy current inspection.
What method of magnetic particle inspection is used most often to inspect aircraft parts for invisible cracks and other defects?
A. Residual.
B. Inductance.
C. Continuous.
C. Continuous.
Which of the following factors are considered essential knowledge for X-ray exposure?
A. Processing of the film and its characteristics.
B. Material thickness and density and the type of defects to be detected.
C. Processing of the film, characteristics of X-ray machine used, and film characteristics.
B. Material thickness and density and the type of defects to be detected.
The testing, medium that is generally used in magnetic particle inspection utilizes a ferromagnetic material that has;
A. High permeability and low retentivity.
B. Low permeability and high retentivity.
C. High permeability and high retentivity
A. High permeability and low retentivity.
Which statement relating to the residual magnetizing inspection method is true?
A. Subsurface discontinuities are made readily apparent.
B. It is used in practically all circular and longitudinal magnetizing procedures.
C. It may be used with steels which have been heat treated for stressed applications.
C. It may be used with steels which have been heat treated for stressed applications.
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?
A. Eddy current test.
B. Metallic ring test.
C. Ultrasonic test.
B. Metallic ring test.
What two types of indicating mediums are available for magnetic particle inspection?
A. Iron and ferric oxides.
B. Wet and dry process materials.
C. High retentivity and low permeability material.
B. Wet and dry process materials.
Which of the following materials may be inspected using the magnetic particle inspection method?
A. Copper alloys.
B. Aluminum alloys.
C. Iron alloys.
C. Iron alloys.
One way a part may be demagnetized after magnetic particle inspection is by;
A. Subjecting the part to high voltage, low amperage AC.
B. Slowly moving the part out of an AC magnetic field of sufficient strength.
C. Slowly moving the part into an AC magnetic field of sufficient strength.
B. 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?
A. 45°
B. Longitudinal.
C. Transverse.
A. 45°
Which of the following methods may be suitable to use to detect cracks open to the surface in aluminum forging s and castings?
A. Dye penetrant inspection and eddy current inspection.
B. Dye penetrant inspection and magnetic particle inspection.
C. Magnetic particle inspection and metallic ring inspection.
A. Dye penetrant inspection and eddy current inspection.
To detect a minute crack using dye penetrant inspection usually requires:
A. That the developer be applied to a flat surface.
B. A longer-than-normal penetrating time.
C. The surface to be highly polished.
B. 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?
A. The size and shape of the discontinuities being looked for.
B. The size and shape of the part being inspected.
C. The type and/or density of the part material.
A. The size and shape of the discontinuities being looked for.
When checking an item with the magnetic particle inspection method, circular and longitudinal magnetization should be used to:
A. Reveal all possible defects.
B. Evenly magnetize the entire part.
C. Ensure uniform current flow.
A. Reveal all possible defects.
In magnetic particle inspection, a flaw that is perpendicular to the magnetic field flux lines generally causes:
A. A large disruption in the magnetic field.
B. A minimal disruption in the magnetic field.
C. No disruption in the magnetic field.
A. A large disruption in the magnetic field.
If dye penetrant inspection indications are not sharp and clear, the most probable cause is that the part:
A. Was not correctly degaussed before the developer was applied.
B. Has no appreciable damage.
C. Was not throughly washed before the developer was applied.
C. Was not throughly washed before the developer was applied.
(1) An aircraft part may 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.
A. Both 1 and 2 are true.
B. Only 1 is true.
C. Only 2 is true.
A. Both 1 and 2 are true.
The pattern for an inclusion is a magnetic particle buildup forming:
A. A fern like pattern.
B. A single line.
C. Parallel lines.
C. Parallel lines.
A part which os being prepared for dye penetrant inspection should be cleaned with:
A. A volatile petroleum-base solvent.
B. The penetrant developer.
C. Water-base solvents only.
A. A volatile petroleum-base solvent.
Under magnetic particle inspection, a part will be identified as having a fatigue crack under which condition?
A. The discontinuity pattern is straight.
B. The discontinuity is found in a nonstressed area of the part.
C. The discontinuity is found in highly stressed area of the part.
C. The discontinuity is found in highly stressed area of the part.
In performing a dye penetrant inspection, the developer:
A. Seeps into a surface crack to indicate the presence of a defect.
B. Acts as a blotter to produce a visible indication.
C. Throughly cleans the surface prior to produce a visible
B. Acts as a blotter to produce a visible indication.
What defects will be detected by magnetizing a part using continuous longitudinal magnetization with a cable?
A. Defects perpendicular to the long axis of the part.
B. Defects parallel to the long axis of the part.
C. Defects parallel to the concentric circles of magnetic force within the part.
A. Defects perpendicular to the long axis of the part.
Circular magnetization of a part can be used to detect which defects?
A. Defects parallel to the long axis of the part.
B. Defects perpendicular to the long axis of the part.
C. Defects perpendicular to the concentric circles of magnetic force within the part.
A. 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.
A. Only 1 is true.
B. Only 2 is true.
C. Both 1 and 2 are true.
C. 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?
A. Concentration cell.
B. Intergranular.
C. Fretting.
B. Intergranular.
Which of the following describe the effects of annealing steel and aluminum alloys?
A. Decreasing internal stresses and softening of the metal.
B. Softening of the metals and improved corrosion resistance.
C. Improved corrosion resistance.
A. 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?
A. Case hardening.
B. Annealing.
C. Tempering.
A. 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?
A. Tempering.
B. Normalizing.
C. Case hardening.
C. Case hardening.
Normalizing is a process of heat treating:
A. Aluminum alloys only.
B. Iron-base metals only.
C. Both aluminum alloys and iron-base metals.
B. Iron-base metals only.
Which of the following occurs when a mechanical force such as rolling, hammering, or bending is repeatedly applied to most metals at room temperature?
A. The metals become artificially aged.
B. The metals become stress corrosion cracked.
C. The metals become strain or work hardened or cold worked.
C. The metals become strain or work hardened or cold worked.
The reheating of a heat treated metal, such as with a welding torch:
A. Has little or no effect on a metal’s heat treated characteristics.
B. Has a cumulative enhancement effect on the original heat treatment.
C. Can significantly alter a metal’s properties in the reheated area.
C. Can significantly alter a metal’s properties in the reheated area.
Why is steel tempered after being hardened?
A. To increase its hardness and ductility.
B. To increase its strength and decrease its internal stresses.
C. To relieve its internal stresses and reduce its brittleness.
C. To relieve its internal stresses and reduce its brittleness.
What aluminum alloy designations indicate that the metal has received no Harding or tempering treatment?
A. 3003-F.
B. 5052-H36.
C. 6061-O.
A. 3003-F.