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