問題一覧
1
Aircraft bolts are usually manufactured with a
Class 3 fit for the threads
2
Select a characteristics of a good gas weld
The weld should taper off smoothly into the base metal
3
On a fillet weld, the penetration requirement includes what percentage(s) of the base metal thickness?
25 – 50 percent
4
How can the dimensional inspection of a bearing in a rocker arm be accomplished?
Telescopic gauge and micrometer
5
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
6
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 element
7
What defects will be detected by magnetizing a part using continuous longitudinal magnetization with a cable?
Defects perpendicular to the axis of the part
8
What is descriptive of the annealing process of steel during after it has been annealed?
Slow cooling; low strength
9
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-treat conditions?
Eddy current inspection
10
Identify the correct statement
Dividers do not provide a reading when used as measuring device
11
Which tool is used to find the center of a shaft or other cylindrical work
Combination set
12
How is the locking feature of the fiber-type locknut obtained?
By the use of an unthreaded fiber locking insert
13
What two types of indicating mediums are available for magnetic particle inspection?
Wet and dry process materials
14
Aircraft bolts are usually manufactured with a
Class 3 fit for the threads
15
In performing a dye penetrant inspection, the developer
Acts as a blotter to produce a visible indication
16
What is steel tempered after being hardened
To relieve its internal stresses and reduce its brittleness
17
A fiber-type, self-locking nut must never be used on an aircraft if the bolt is
Subject to rotation
18
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
19
Unless otherwise specified, torque values for tightening aircraft nuts and bolts relate to
Clean, dry threads
20
Normalizing is a process of heat treating
Iron-base metal only
21
Which statement regarding aircraft bolts is correct?
In general, bolt grip lengths should equal the material thickness
22
When the specific torque value for nuts is not given, where can the recommended torque value be found?
AC 43. 13-1B
23
If it is necessary to accurately measure the diameter of a hole approximately ¼ inch in diameter, the mechanic should use a
Small-hole gauge and determine the size of the hole by taking a micrometer reading of the ball end of the gauge
24
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
25
Magnetic particle inspection is used primarily to detect
Flaws on or near the surface
26
Circular magnetization of a part can be used to detect which defects?
Defects parallel to the long axis of the part
27
How is the locking feature of the fiber-type locknut obtained?
By the use of an unthreaded fiber locking insert
28
A bolt with an X inside a triangle on the head is classified as an
NAS close tolerance bolt
29
What aluminum alloy designations indicate that the metal has received no hardening or tempering treatment
3003-F
30
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
31
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
32
Select a characteristics of a good gas weld
The weld should taper off smoothly into the base metal
33
What method of magnetic particle inspection is used most often to inspect aircraft parts for invisible cracks and other defects?
Continuous
34
Which condition indicates a part has cooled too quickly after being welded?
Cracking adjacent to the weld
35
Under magnetic particle inspection, a part will be identified as having a fatigue crack under which condition?
The discontinuity is found in a highly stressed area of the part
36
Which of the following methods may be suitable to use to detect cracks open to the surface in aluminum forgings and castings? 1. Dye penetrant 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
37
What tool is generally used to set a divider to an exact dimension?
Machinist scale
38
What is generally used in the construction of aircraft engine firewalls?
Stainless steel
39
The core material of Alclad 2024-T4 is
Heat-treated aluminum alloy, and the surface material is commercially pure aluminum
40
(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 No.1 and No.2 are true
41
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
42
In examining and evaluating a welded joint, a mechanic should be familiar with
Likely ambient exposure conditions and intended use of the part, along with type of weld and original part material composition
43
Which type crack can be detected by magnetic particle inspection using either circular or longitudinal magnetization
45*
44
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
45
A part which is being prepared for dye penetrant inspection should be clean with
A volatile petroleum-based solvent
46
(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 No. 1 and No. 2 are true
47
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
Thickness gauge
48
Which tool can be used to measure the alignment of a rotor shaft or the plane of rotation of a disk?
Dial indicator
49
Which of these nondestructive testing methods is suitable for the inspection of most metals, plastics and ceramics for surface and subsurface defects?
Ultrasonic inspection
50
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
51
Aircraft bolts with a cross or asterisk marked on the bolthead are
Standard steel bolts
52
If dye penetrant inspection indications are not sharp and clear, the most cause is that part
Was not thoroughly washed before the developer was applied
53
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. Nonporous plastics
2,3,5
54
What tool is generally used to calibrate a micrometer or check its accuracy?
Gauge block
55
Which tool is used to measure the clearance between a surface plate and a relatively narrow surface being checked for flatness?
Thickness gauge
56
The clearance between the piston rings and the ring lands is measured with a
Thickness gauge
57
A bolt with a single raised dash on the head is classified as an
AN corrosion-resistant steel bolt
58
Which of the following is a main determinant of the dwell time to use when conducting a dye r fluorescent penetrant inspection?
The size and shape of the discontinuities being looked for
59
Which tool can be used to determine piston pin out-of-round wear?
Micrometer caliper
60
Alclad is a metal consisting of
Pure aluminum surface layers on an aluminum alloy core
61
Which heat-treating process of metal produces a hard, wear-resistant surface over a strong, tough core?
Case hardening
62
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
63
Which material cannot be heat treated repeatedly without harmful effects?
Clad aluminum alloy
64
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 straight section that are 20% of tube diameter
1,2,3 and 5
65
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
66
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
½ inch
67
What metal has special short-time heat properties and is used in the construction of aircraft firewalls?
Titanium alloy
68
Which statement regarding aircraft bolts is correct?
In general, bolt grip lengths should equal the material thickness
69
To detect a minute crack using dye penetrant inspection usually requires
A longer-than-normal penetrating time
70
In magnetic particle inspection, a flaw that is perpendicular to the magnetic field flux lines generally causes
A large disruption in the magnetic field
71
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
72
What type of corrosion may attack the grain boundaries of aluminum alloys when the heat treatment process has been improperly accomplished
Intergranular
73
The aluminum code number 1100 identifies what type of aluminum
99 percent commercially pure aluminum
74
What may be used to check the stem on a poppet-type valve for stretch?
Micrometer
75
The pattern for an inclusion is a magnetic particle build up forming
Parallel lines
76
Generally speaking, bolt grip lengths should be
Equal to the thickness of the material which is fastened together
77
Unless otherwise specified or required, aircraft bolts should be installed so that the bolthead is
Upward, or in a forward direction
78
What precision measuring tool is used for measuring crankpin and main bearing journals for out-of-round wear?
Micrometer caliper
79
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
80
The testing medium that is generally used in magnetic particle inspection utilizes a ferromagnetic material that has
High permeability and low retentivity
81
When checking an item with the magnetic particle inspection method, circular and longitudinal magnetization should be used to
Reveal all possible defects
82
Which number represents the Vernier scale graduation of a micrometer?
.0001
83
The reheating of het treated metal, such as with a welding torch
Can significantly alter a metal’s properties in the reheated area
84
Where is an AN clevis bolt used in an airplane
Only for shear load applications
85
In the four-digit aluminum index system number 2024, the first digit indicates
The major alloying element
86
Why is it considered good practice to normalize a part after welding?
To relieve internal stresses developed within the base metal