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MATERIALS, HARDWARE & PROCESSES > Final Materials/Processing 8245-77 & 8289-8307 > Flashcards

Final Materials/Processing 8245-77 & 8289-8307 Flashcards

1
Q

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

A ) Decreasing internal stresses and softening of the
metal.

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2
Q

2- 8257. What is generally used in the construction of aircraft exhaust collectors, stacks, and manifolds?

A ) Stainless steel.
B ) Titanium
C ) Aluminum

A

A—Stainless steel.

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3
Q

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.

A

C—Titanium alloy.

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4
Q

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.

A

B ) pure aluminum surface layers on an aluminum alloy core.

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5
Q

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

A ) heat-treated aluminum alloy, and the surface material is commercially pure aluminum.

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6
Q

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.

A

C —99 percent commercially pure aluminum.

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7
Q

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.

A

B ) Intergranular.

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8
Q

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

A ) Case hardening.

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9
Q

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.
.

A

C — Case hardening.

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10
Q

10) 8249. Normalizing is a process of heat treating?

A ) aluminum alloys only.
B ) Iron-base metals only
C ) both

A

B-iron-base metals only.

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11
Q

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.

A

C ) can significantly alter a metal’s properties in the reheated

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12
Q

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

A ) 3003-F

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13
Q

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.

A

C ) Clad aluminum alloy.

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14
Q

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.

A

B — Slow cooling: low strength.

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15
Q

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?

A

C.–The metals become strain or work hardened or cold
worked.

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16
Q

16) 8252
Why is steel tempered after being hardened?
.

A

C — To relieve its internal stresses and reduce its brittleness.

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17
Q

17) 8258
Unless otherwise specified or required, aircraft bolts should be installed so that the bolthead is

A

C — downward, or in a forward direction.

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18
Q

18) 8260
A fiber-type, self-locking nut must never be used on an aircraft if the bolt is
.

A

C — subject to rotation.

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19
Q

19) 8260-1. Self-locking nuts may be used on aircraft provided that

A

C—the bolt or nut is not subject to rotation.

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20
Q

20) 8267
(Refer to Figure 43.) Identify the clevis bolt illustrated.

A

B — 3.

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21
Q

21) 8271
Where is an AN clevis bolt used in an airplane?

A

C — Only for shear load applications.

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22
Q

22) 8275
Aircraft bolts are usually manufactured with a

A

C — class 3 fit for the threads

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23
Q

23) 8261-1
Which is an acceptable safety device for a castle nut when installed on secondary structures?
.

A

C — Cotter pin.

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24
Q

24) 8277
How is the locking feature of the fiber-type locknut obtained?

A

A — By the use of an unthreaded fiber locking insert.

25
Q

25) 8261-2.
When installing a castle nut, start alignment with the cotter pin hole at the
.

A

C — minimum recommended torque plus friction drag torque.

26
Q

26) 8262-1
When used in close proximity to magnetic com-passes, cotter pins are made of what material?

A

A — Corrosion resisting steel.

27
Q

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

A

B — rejected.

28
Q

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

A

C — change washers and try again.

29
Q

29) 8270
How is a clevis bolt used with a fork-end cable terminal secured?

A

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
Q

30) 8289
Which tool can be used to measure the alignment of a rotor shaft or the plane of rotation of a disc?

A

A — Dial indicator.

31
Q

31) 8295
Which tool is used to find the center of a shaft or other cylindrical work?

A

A — Combination set.

32
Q

32) 8256. Torque values for aircraft bolts normally consider
.

A

A — the threads to be clean and dry.

33
Q

33) 8264
Which statement regarding aircraft bolts is correct?

A

B — In general, bolt grip lengths should equal the material thickness

34
Q

34) 8266. When the specific torque value for nuts is not given, where can the recommended torque value be found?

A

A — AC 43.13-1B.

35
Q

35) 8265
Generally speaking, bolt grip lengths should be

A

B — equal to the thickness of the material which is fastened together.

36
Q

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

A

C — basic alloying element.

37
Q

37) 8262
(Refer to Figure 42.) Which of the bolthead code markings shown identifies an AN corrosion resistant steel bolt?

A

C — 3.

38
Q

38) 8263
Aircraft bolts with a cross or asterisk marked on the bolthead are

A

C — standard steel bolts.

39
Q

39) 8269
A bolt with a single raised dash on the head is classified as an

A

A — AN corrosion resistance steel bolt.

40
Q

40) 8272. A bolt with an X inside a triangle on the head is classified as an

A

B — NAS close tolerance bolt.

41
Q

41) 8276
In the four-digit aluminum index system number 2024, the first digit indicates

A

A — the major alloying element.

42
Q

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

A — 1/2 inch.

43
Q

43) 8277-1
Why should an aircraft maintenance technician be familiar with weld nomenclature?

A

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

44
Q

44) 8290
(Refer to Figure 46.) The measurement reading on the illustrated micrometer is

A

A — 0.2851

45
Q

45) 8291.
Identify the correct statement.

A

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

46
Q

46) 8293.
Which tool is used to measure the clearance between a surface plate and a relatively narrow surface being checked for flatness?

A

B — Thickness gauge.

47
Q

47) 8294.
Which number represents the vernier scale graduation of a micrometer?

A

C — .0001

48
Q

48) 8292.
(Refer to Figure 47.) What is the measurement reading on the vernier caliper scale?

A

B — 1.436 inches.

49
Q

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

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
Q

50) 8298.
(Refer to Figure 49.) The measurement reading on the micrometer is

A

C — .2792

51
Q

51) 8299. What tool is generally used to set a divider to an exact dimension?

A

A — Machinist scale.

52
Q

52) 8301. What precision measuring tool is used for measuring crankpin and main bearing journals for out-of-round wear?

A

B — Micrometer caliper.

53
Q

53) 8302. The side clearances of piston rings are measured with a

A

B — thickness gauge.

54
Q

54) 8303. How can the dimensional inspection of a bearing in a rocker arm be accomplished?

A

C —Telescopic gauge and micrometer.

55
Q

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

A

C — thickness gauge.

56
Q

56) 8306. What may be used to check the stem on a poppet-type valve for stretch?

A

B — Micrometer.

57
Q

57) 8307.
Which tool can be used to determine piston pin out-of-round wear?

A

B — Micrometer caliper.

58
Q

58) 8300.
What tool is generally used to calibrate a microm-• eter or check its accuracy?

A

A — Gauge block.

MATERIALS, HARDWARE & PROCESSES (3 decks)

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