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General Writtens > Materials and Processes > Flashcards

Materials and Processes Flashcards

1
Q

Magnetic particle inspection is used primarily to detect…

A

Flaws on or near the surface.

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2
Q

Liquid penetrant inspection methods may be used on which of the following?

A

Ferrous and nonferrous metals and nonporous plastics.

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3
Q

Which of these nondestructive testing methods is suitable for the inspection of most metals, plastics, and ceramics for surface and subsurface defects?

A

Ultrasonic inspection

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4
Q

Which of these nondestructive testing methods is suitable for the inspection of most metals, plastics, and ceramics for surface and subsurface defects?

A

Ultrasonic Inspection.

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5
Q

Which of the following defects are not acceptable for metal lines?

A

Dents in straight section that are 20% of tube diameter.

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6
Q

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?

A

Eddy current inspection.

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7
Q

What method of magnetic particle inspection is used most often to inspect aircraft parts for invisible cracks and other defects?

A

Continuous.

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8
Q

Which of the following factors are considered essential knowledge for X-ray exposure?

A

Material thickness and density and the type of defect to be detected.

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9
Q

The testing medium that is generally used in magnetic particle inspection utilizes a ferromagnetic material that has…

A

High permeability and low retentivity

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10
Q

Which statement relating to the residual magnetizing inspection method is true?

A

It may be used with steels which have been heat treated for stressed applications.

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11
Q

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?

A

Metallic ring test.

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12
Q

What two types of indicating mediums are available for magnetic particle inspection?

A

Wet and dry process materials.

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13
Q

Which of the following materials may be inspected using the magnetic particle inspection method?

A

Iron alloys.

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14
Q

One way a part may be demagnetized after magnetic particle inspection is by…

A

Slowly moving the part out of an AC magnetic field of sufficient strength.

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15
Q

Which type crack can be detected by magnetic particle inspection using either circular or longitudinal magnetization?

A

45 DEGREES.

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16
Q

Which of the following methods may be suitable to use to detect cracks open to the surface in aluminum forgings and castings?

A

Dye penetrant inspection and eddy current inspection.

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17
Q

To detect a minute crack using dye penetrant inspection usually requires…

A

A longer-than-normal penetrating time.

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18
Q

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.

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19
Q

When checking an item with the magnetic particle method, circular and longitudinal magnetization should be used to…

A

Reveal all possible defects.

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20
Q

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.

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21
Q

If dye penetrant inspection indicators are not sharp and clear, the most probable cause is that the part…

A

Was not thoroughly washed before the developer was applied.

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22
Q

(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,

A

Both 1 and 2 are true.

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23
Q

The pattern for an inclusion is a magnetic particle buildup forming…

A

Parallel lines.

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24
Q

A part which is being prepared for dye penetrant inspection should be cleaned with…

A

A volatile petroleum-base solvent.

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25
Q

Under magnetic particle inspection, a part will be identified as having a fatigue crack under which condition?

A

The discontinuity is found in a high stressed area of the part.

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26
Q

In performing a dye penetrant inspection, the developer…

A

Acts as a blotter to produce a visible inspection.

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27
Q

What defects will be detected by magnetizing a part using continuous longitudinal magnetization with a cable?

A

Defect perpendicular to the long axis of the part.

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28
Q

Circular magnetization of a part can be used to detect which of the defects?

A

Defects parallel to the long axis of the part.

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29
Q

(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,

A

Both 1 and 2 are true.

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30
Q

What type of corrosion may attack the grain boundaries of aluminum alloys when the heat treatment process has been improperly accomplished?

A

Intergranular.

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31
Q

Which of the following describe the effects of annealing steel and aluminum alloys?

A

Decreasing internal stresses and softening of the metal.

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32
Q

Which heat-treating process of metal produces a hard, wear resistant surface over a strong, tough core?

A

Case hardening.

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33
Q

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

Case hardening.

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34
Q

Normalizing is a process of heat treating…

A

Iron-base metals only.

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35
Q

Which of the following occurs when a mechanical force as rolling, hammering, or bending is repeatedly applied to most metals at room temperature?

A

The metals become strain or work hardened or cold worked.

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36
Q

The reheating of a heat treated metal, such as with a welding torch…

A

Can significantly alter a metal’s properties in the reheated area.

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37
Q

Why is steel tempered after being hardened?

A

To relieve its internal stresses and reduce its brittleness.

38
Q

What aluminum alloy designations indicate that the metal has received no hardening or tempering treatment?

A

3003-F.

39
Q

Which material cannot be heat treated repeatedly without harmful effects?

A

Clad aluminum alloy.

40
Q

What is descriptive of the annealing process of steel during and after it has been annealed?

A

Slow cooling; low strength.

41
Q

Torque values for aircraft bolts normally consider…

A

The threads to be clean and dry.

42
Q

What is generally used in the construction of aircraft exhaust collectors, stacks, and manifolds?

A

Stainless steel.

43
Q

What metal has special short-time heat properties and is used in the construction of aircraft firewalls?

A

Titanium alloy.

44
Q

Unless otherwise specified or required, aircraft bolts should be installed so that the bolted is…

A

Upward, or in a forward direction.

45
Q

Alclad is a metal consisting of…

A

Pure aluminum surface layers on an aluminum alloy core.

46
Q

A fiber-type, self-locking nut must never be used on an aircraft if the bolt is…

A

Subject to rotation.

47
Q

Self-locking nuts may be used on aircraft provided that…

A

The bolt or nut is not subject to rotation.

48
Q

The Society of Automotive Engineers (SAE) and the American Iron and Steel Institute use a numerical index system to identify the composition of various steels. In the number “4130” designating chromium molybdenum steel, the first digit indicates the…

A

Basic alloying element.

49
Q

(Refer to Figure 42.) Which of the bolthead code markings shown identifies an AN corrosion resistant steel bolt?

A

3.

50
Q

Aircraft bolts with a cross or asterisk marked on the bolthead are…

A

Standard steel bolts.

51
Q

Which statement regarding aircraft bolts is correct?

A

In general, bolt grip lengths should equal the material thickness.

52
Q

Generally speaking, bolt grip lengths should be…

A

Equal to the thickness of the material which is fastened together.

53
Q

When the specific torque value for nuts is not given, where can the recommended torque value be found?

A

AC 43.13-1B.

54
Q

(Refer to Figure 43.) Identify the clevis bolt illustrated.

A

3.

55
Q

A particular component is attached to the aircraft structure by the use of an aircraft bolt and a castle tension nut combination. If the cotter pin hole does not align within the recommended torque range, the acceptable practice is to…

A

Change washers and try again.

56
Q

A bolt with a single raised dash on the head is classified as an…

A

AN corrosion-resistant steel bolt.

57
Q

How is a clevis bolt used with a fork-end cable terminal secured?

A

With a shear nut tightened to a snug fit, but with no strain imposed on the fork and safetied with a cotter pin.

58
Q

Where is an AN clevis bolt used in an airplane?

A

Only for shear load applications.

59
Q

A bolt with an X inside a triangle on the head is classified as an…

A

NAS close tolerance bolt.

60
Q

The core material of Alclad 2024-T4 is…

A

Heat-treated aluminum alloy, and the surface material is commercially pure aluminum.

61
Q

The aluminum code number 1100 identifies what type of aluminum?

A

99 percent commercially pure aluminum.

62
Q

Aircraft bolts are usually manufactured with a…

A

Class 3 fit for the threads.

63
Q

In the four-digit aluminum index system number 2024, the first digit indicates…

A

The major alloying element.

64
Q

How is the locking feature of the fiber-type locknut obtained?

A

By the use of an unthreaded fiber locking insert.

65
Q

Why should an aircraft maintenance technician be familiar with weld nomenclature?

A

In order to gain familiarity with the welding technique, filler material, and temperature range used.

66
Q

(Refer to Figure 44.) Identify the weld caused by an excessive amount of acetylene.

A

3.

67
Q

(Refer to Figure 44.) Select the illustration which depicts a cold weld.

A

2.

68
Q

Why is it considered good practice to normalize a part after welding?

A

To relieve internal stresses developed within the base metal.

69
Q

Holes and a few projecting globules are found in a weld. What action should be taken?

A

Remove all the old, and reweld the joint.

70
Q

Which condition indicates a part has cooled too quickly after being welded?

A

Cracking adjacent to the weld.

71
Q

Select a characteristic of a good gas weld.

A

The weld should taper off smoothly into the base metal.

72
Q

One characteristics of a good weld is that no oxide should be formed on the base metal at a distance from the weld of more than…

A

1/2 inch.

73
Q

In examining and evaluating a welded joint, a mechanic should be familiar with…

A

Likely ambient exposure conditions and intended use of the part, along with type of weld and original part material composition.

74
Q

(Refer to Figure 45.) What type weld is shown at A?

A

Butt.

75
Q

(Refer to Figure 45.) What type of weld is shown at B?

A

Double butt.

76
Q

(Refer to Figure 45.) What type weld is shown at G.

A

Lap.

77
Q

Identify the correct statement.

A

Dividers do not provide a reading when used as a measuring device.

78
Q

(Refer to Figure 47.) What is a measurement reading on the vernier caliper scale?

A

1.436 inches.

79
Q

Which tool is used to measure the clearance between surface plate and a relatively narrow surface being checked for flatness?

A

Thickness gauge.

80
Q

Which number represents the vernier scale graduation of a micrometer?

A

0.0001

81
Q

Which tool is used to find the center of a shaft or other cylindrical work?

A

Combination set.

82
Q

(Refer to Figure 48.) What does the micrometer read?

A

0.3004.

83
Q

If it is necessary to accurately measure the diameter of a hole approximately 1/4 inch in diameter, the mechanic should use a…

A

Small-hole gauge and determine the size of the hole by taking a micrometer reading of the ball end of the gauge.

84
Q

(Refer to Figure 49.) The measurement reading on the micrometer is…

A

0.2792

85
Q

What tool is generally used to set a divider to an exact dimension?

A

Machinist scale.

86
Q

What tool is generally used to calibrate a micrometer or check its accuracy?

A

Gauge block.

87
Q

What precision measuring tool is used for measuring crankpin and main bearing journals for out-of-round wear?

A

Micrometer caliper.

88
Q

The side clearances of piston rings are measured with a…

A

thickness gauge

89
Q

How can the dimensional inspection of a bearing in a rocker arm be accomplished?

A

Telescopic gauge and micrometer.

90
Q

The twist of a connecting rod is checked by installing push-fit arbors in both ends, supported by parallel steel bars on a surface plate. Measurements are taken between the arbor and the parallel bar with a…

A

Thickness gauge.

91
Q

What may be used to check the stem on a poppet-type valve for stretch?

A

Micrometer.

92
Q

Which tool can be used to determine piston pin out-of-round wear?

A

Micrometer caliper.

General Writtens (11 decks)

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