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  • 問題数 84 • 2/12/2024

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    問題一覧

  • 1

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

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

  • 2

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

    Subject to rotation

  • 3

    "How many of these factors are considered essential knowledge for x-ray exposure? 1. Processing of the film 2. Material thickness and density 3. Exposure distance and angle 4. Film characteristics"

    Three

  • 4

    To detect a minute crack using dye penetrant inspection usually requires

    A longer-than-normal penetrating time

  • 5

    The clearances between the piston rings and the ring lands is measured with a

    Thickness gauge

  • 6

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

    A volatile petroleum-base solvent

  • 7

    Aircraft bolts are usually manufactured with a

    Class 3 fit for the threads

  • 8

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

    Stainless steel

  • 9

    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

  • 10

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

    Gauge block

  • 11

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

    The discontinuity is found in a highly stressed area of the part

  • 12

    Alclad is a metal consisting of

    Pure aluminum surface layers on an aluminum alloy core.

  • 13

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

    Ultrasonic inspection

  • 14

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

    Case hardening

  • 15

    In magentic particle inspection, a flaw that is perpendicular to the magnetic field flux line generally causes

    A large disruption in the magnetic field

  • 16

    "Which of the following defects are not acceptable for metal lines? 1. Cracked flare 2. Seams 3. Dents in the heel of a bend less than 20% of the diameter 4. Scratches/nicks on the inside of a bend less than 10% of wall thickness 5. Dents in a straight section that re 20% of tube diameter"

    1,2,3 and 5

  • 17

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

    NAS close tolerance bolt

  • 18

    (1) In nondestructive testing, a discountinuity may be defined as 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 statements,"

    Both No. 1 and No. 2 are true.

  • 19

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

    By the use of an unthreaded fiber locking insert

  • 20

    The side clearances of piston rings are measured with a

    Thickness guage

  • 21

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

    Titanium alloy

  • 22

    Which tool can be used to measure the alignment of a rotor shaft or the plane of rotation of a disk?

    Dial indicator

  • 23

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

    Thickness gauge

  • 24

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

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

  • 25

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

    45°

  • 26

    Magnetic particle inspection is used primarily to detect

    Flaws on or near the surface

  • 27

    What is an AN celvis bolt used in an airplane?

    Only for shear load applications

  • 28

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

    Slow cooling; low strength

  • 29

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

    Wet and dry process materials

  • 30

    "Which of the following describe the effects of annealing steel and aluminum alloys? 1. Decrease in internal stress 2. Softening of the metal 3. Improved corrosion resistance"

    1,2

  • 31

    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

    Change washers and try again

  • 32

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

    Combination set

  • 33

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

    High permeability and low retentivity

  • 34

    "(1) An aircraft may be demagnitized by subjecting it to a magnetizing force form alternating current that is gradually reduced in strength (2) An aircraft may be demagnitized by subjecting it to a magnetizing force form direct current that is alternatively reversed in direction and gradually reduced in strength."

    Both No. 1 and No. 2 are true

  • 35

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

    Micrometer caliper

  • 36

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

    Micrometer caliper

  • 37

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

    Can significantly alter a metal's properties in the reheated area

  • 38

    A mechanic has completed a bonded honeycomb repair using the potted compound repair technique. What non-destructive testing method is used to determine the soundness of the repair after the repair has cured?

    Metallic ring test

  • 39

    Unless otherwise specified, torque values for tightening aircraft nuts and bolts relate to

    Clean, dry threads

  • 40

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

    Defects parallel to the long axis of the part

  • 41

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

    Thickness gauge

  • 42

    "Liquid penetrant inspection methods may be used on which of the following? 1. Porous plastics 2. Ferrous metals 3. Nonferrous metals 4. Smooth primer-sealed wood 5. Non Porous plastics"

    2,3,5

  • 43

    The core material of Alclad 2024-T4 is

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

  • 44

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

    Telescopic gauge and micrometer

  • 45

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

    Defects perpendicular to the long axis of the part

  • 46

    If dye penetration indication are not sharp and clear, the most probable cause is that the part

    Was not thoroughly washed before the developer was applied

  • 47

    Select a characteristic of a good gas weld

    The weld should taper off smoothly into the base metal

  • 48

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

    Upward, or in a forward direction

  • 49

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

    Standard steel bolts

  • 50

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

    AC 43.13-1B

  • 51

    On a fillet weld, the penetration requirement includes what percentage(s) of the base metal thickness?

    25 to 50 percent

  • 52

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

    It may be used with steels which have been heat-treated for stressed application

  • 53

    "Which of the following occurs when a mechanical force is repeatedly applied to most metals at room temperature, such as rolling, hammering, or bending? 1. The metals become artificially aged 2. The metals become stress corrosion cracked 3. The metals become cold worked, strain or work hardened."

    3

  • 54

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

    Remove all the old weld, and reweld the joint

  • 55

    Which statement regarding aircraft bolts is correct?

    In general, bolt grip lengths should equal the material thickness

  • 56

    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

    Basic alloying ellement

  • 57

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

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

  • 58

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

    1/2 inch

  • 59

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

    Machinist scale

  • 60

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

    Micrometer

  • 61

    What is steel tampered after being hardened?

    To relieve its internal stresses and reducce its brittleness

  • 62

    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

  • 63

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

    AN corrosion-resistant steel bolt

  • 64

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

    Cracking adjacent to the weld

  • 65

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

    Reveal all possible defects

  • 66

    "Which of the following materials may be inspected using the magnetic particle inspection method? 1. Magnesium alloys 2. Aluminum alloys 3. Iron alloys 4. Copper alloys 5. Zinc alloys"

    3

  • 67

    In performing a dye penetrant inspection, the developer

    Acts as a blotter to produce a visible indication

  • 68

    Which material cannot be heat treated repeatedly without harmful effects?

    Clad aluminum alloy

  • 69

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

    Continuous

  • 70

    Which number represents the Vernier scale graduation of a micrometer?

    0.0001

  • 71

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

    3003-F

  • 72

    Normalizing is a process of heat treating

    Iron-base metals only

  • 73

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

    Intergranular

  • 74

    The aluminum code number 1100 identifies what type of aluminum?

    99 percent commercially pure aluminum

  • 75

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

    The major alloying element

  • 76

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

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

  • 77

    The pattern for inclusion is a magnetic particle buildup forming

    Parallel lines

  • 78

    Which of the following is a main determinant of the dwell time to use when conducting a dye or flourescent penetrant inspection?

    The size and shape of the discontinuities being looked for

  • 79

    "Which of the following methods may be suitable to use to detect cracks open to the surface in aluminum forgings and castings? 1. Dye penetration inspection 2. Magnetic particle inspection 3. Metallic ring (coin tap) inspection 4. Eddy current inspection 5. Ultrasonic inspection 6. Visual inspection"

    1,4,5,6

  • 80

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

    The bolt or nut are not subject to rotation

  • 81

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

    To relieve internal stresses developed within the base metal

  • 82

    Identify the correct statement.

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

  • 83

    What non-destrucctive 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 sand their heat-treat conditions?

    Eddy current inspection

  • 84

    Generally speaking, bolt grip lengths should be

    Equal to the thickness of the material which is fastened together