Final Materials/Processing 8245-77 & 8289-8307 Flashcards
1- 8246. 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.
2- 8257. What is generally used in the construction of aircraft exhaust collectors, stacks, and manifolds?
A ) Stainless steel.
B ) Titanium
C ) Aluminum
A—Stainless steel.
3- 8257-1. What metal has special short-time heat properties and is used in the construction of aircraft firewalls?
A ) Stainless steel.
B ) Chrome molybdenum alloy steel.
C ) Titanium alloy.
C—Titanium alloy.
4- 8259. Alclad is a metal consisting of
A ) aluminum alloy surface layers and a pure aluminum
core.
B ) pure aluminum surface layers on an aluminum alloy core.
C ) a homogeneous mixture of pure aluminum and aluminum alloy.
B ) pure aluminum surface layers on an aluminum alloy core.
5) 8273. The core material of Alclad 2024-4 is
A ) heat-treated aluminum alloy, and the surface material is commercially pure aluminum.
B ) commercially pure aluminum, and the surface material is heat-treated aluminum alloy.
C ) strain-hardened aluminum alloy, and the surface material is commercially pure aluminum.
A ) heat-treated aluminum alloy, and the surface material is commercially pure aluminum.
6) 8274. The aluminum code number 1100 identifies what type of aluminum?
A ) Aluminum alloy containing 11 percent copper.
B ) Aluminum alloy containing zinc.
C ) 99 percent commercially pure aluminum.
C —99 percent commercially pure aluminum.
7) 8245.
What type of corrosion may attack the grain boundaries of aluminum alloys when the heat treatment process has been improperly accomplished?
has been improperly accomplished?
A ) Concentration cell.
B ) Intergranular.
C ) Fretting.
B ) Intergranular.
8) 8247
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.
9) 8248.
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.
10) 8249. Normalizing is a process of heat treating?
A ) aluminum alloys only.
B ) Iron-base metals only
C ) both
B-iron-base metals only.
11) 8251
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
12) 8253
What aluminum alloy designations indicate that the metal has received no hardening or tempering treatment?
A ) 3003-F
B ) 5052-H36.
C ) 6061-O
A ) 3003-F
13) 8254
Which material cannot be heat treated repeatediy without harmful effects?
A ) Unclad aluminum alloy in sheet form.
B ) 6061-9 stainless steel.
C ) Clad aluminum alloy.
C ) Clad aluminum alloy.
14) 8255
What is descriptive of the annealing process af steel during and after it has been annealed?
A ) Rapid cooling; high strength.
B ) Slow cooling; low strength.
C ) Slow cooling; increased resistance to wear.
B — Slow cooling: low strength.
15) 8250. Which of the following occurs when a mechanical force such as rolling, hammering, or bending is repeatedly applied to most metals at room temperature?
C.–The metals become strain or work hardened or cold
worked.
16) 8252
Why is steel tempered after being hardened?
.
C — To relieve its internal stresses and reduce its brittleness.
17) 8258
Unless otherwise specified or required, aircraft bolts should be installed so that the bolthead is
C — downward, or in a forward direction.
18) 8260
A fiber-type, self-locking nut must never be used on an aircraft if the bolt is
.
C — subject to rotation.
19) 8260-1. Self-locking nuts may be used on aircraft provided that
C—the bolt or nut is not subject to rotation.
20) 8267
(Refer to Figure 43.) Identify the clevis bolt illustrated.
B — 3.
21) 8271
Where is an AN clevis bolt used in an airplane?
C — Only for shear load applications.
22) 8275
Aircraft bolts are usually manufactured with a
C — class 3 fit for the threads
23) 8261-1
Which is an acceptable safety device for a castle nut when installed on secondary structures?
.
C — Cotter pin.
24) 8277
How is the locking feature of the fiber-type locknut obtained?
A — By the use of an unthreaded fiber locking insert.
25) 8261-2.
When installing a castle nut, start alignment with the cotter pin hole at the
.
C — minimum recommended torque plus friction drag torque.
26) 8262-1
When used in close proximity to magnetic com-passes, cotter pins are made of what material?
A — Corrosion resisting steel.
27) 8263-1
When a fiber or nylon insert-type self-locking nut can be threaded on a bolt or stud through the insert with only the fingers, it should be
B — rejected.
28) 8268
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
C — change washers and try again.
29) 8270
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.
30) 8289
Which tool can be used to measure the alignment of a rotor shaft or the plane of rotation of a disc?
A — Dial indicator.
31) 8295
Which tool is used to find the center of a shaft or other cylindrical work?
A — Combination set.
32) 8256. Torque values for aircraft bolts normally consider
.
A — the threads to be clean and dry.
33) 8264
Which statement regarding aircraft bolts is correct?
B — In general, bolt grip lengths should equal the material thickness
34) 8266. When the specific torque value for nuts is not given, where can the recommended torque value be found?
A — AC 43.13-1B.
35) 8265
Generally speaking, bolt grip lengths should be
B — equal to the thickness of the material which is fastened together.
36) 8261
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
C — basic alloying element.
37) 8262
(Refer to Figure 42.) Which of the bolthead code markings shown identifies an AN corrosion resistant steel bolt?
C — 3.
38) 8263
Aircraft bolts with a cross or asterisk marked on the bolthead are
C — standard steel bolts.
39) 8269
A bolt with a single raised dash on the head is classified as an
A — AN corrosion resistance steel bolt.
40) 8272. A bolt with an X inside a triangle on the head is classified as an
B — NAS close tolerance bolt.
41) 8276
In the four-digit aluminum index system number 2024, the first digit indicates
A — the major alloying element.
42) 8284
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
A — 1/2 inch.
43) 8277-1
Why should an aircraft maintenance technician be familiar with weld nomenclature?
B — In order to gain familiarity with the welding technique, filler material, and temperature range used.
44) 8290
(Refer to Figure 46.) The measurement reading on the illustrated micrometer is
A — 0.2851
45) 8291.
Identify the correct statement.
C — Dividers do not provide a reading when used as a measuring device.
46) 8293.
Which tool is used to measure the clearance between a surface plate and a relatively narrow surface being checked for flatness?
B — Thickness gauge.
47) 8294.
Which number represents the vernier scale graduation of a micrometer?
C — .0001
48) 8292.
(Refer to Figure 47.) What is the measurement reading on the vernier caliper scale?
B — 1.436 inches.
49) 8297. If it is necessary to accurately measure the diameter of a hole approximately 1/4 inch in diameter, the mechanic should use a
.
C — small-hole gauge and determine the size of the hole by taking a micrometer reading of the ball end of the gauge.
50) 8298.
(Refer to Figure 49.) The measurement reading on the micrometer is
C — .2792
51) 8299. What tool is generally used to set a divider to an exact dimension?
A — Machinist scale.
52) 8301. What precision measuring tool is used for measuring crankpin and main bearing journals for out-of-round wear?
B — Micrometer caliper.
53) 8302. The side clearances of piston rings are measured with a
B — thickness gauge.
54) 8303. How can the dimensional inspection of a bearing in a rocker arm be accomplished?
C —Telescopic gauge and micrometer.
55) 8304. 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
C — thickness gauge.
56) 8306. What may be used to check the stem on a poppet-type valve for stretch?
B — Micrometer.
57) 8307.
Which tool can be used to determine piston pin out-of-round wear?
B — Micrometer caliper.
58) 8300.
What tool is generally used to calibrate a microm-• eter or check its accuracy?
A — Gauge block.
