Final Materials/Processing 8245-77 & 8289-8307

Question 1

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.

Answer 1

A ) Decreasing internal stresses and softening of the
metal.

Question 2

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

A ) Stainless steel.
B ) Titanium
C ) Aluminum

Answer 2

A—Stainless steel.

Question 3

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.

Answer 3

C—Titanium alloy.

Question 4

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.

Answer 4

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

Question 5

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.

Answer 5

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

Question 6

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.

Answer 6

C —99 percent commercially pure aluminum.

Question 7

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.

Answer 7

B ) Intergranular.

Question 8

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.

Answer 8

A ) Case hardening.

Question 9

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.
.

Answer 9

C — Case hardening.

Question 10

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

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

Answer 10

B-iron-base metals only.

Question 11

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.

Answer 11

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

Question 12

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

Answer 12

A ) 3003-F

Question 13

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.

Answer 13

C ) Clad aluminum alloy.

Question 14

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.

Answer 14

B — Slow cooling: low strength.

Question 15

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?

Answer 15

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

Question 16

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

Answer 16

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

Question 17

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

Answer 17

C — downward, or in a forward direction.

Question 18

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

Answer 18

C — subject to rotation.

Question 19

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

Answer 19

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

Question 20

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

Answer 20

B — 3.

Question 21

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

Answer 21

C — Only for shear load applications.

Question 22

22) 8275
Aircraft bolts are usually manufactured with a

Answer 22

C — class 3 fit for the threads

Question 23

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

Answer 23

C — Cotter pin.

Question 24

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

Answer 24

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

Question 25

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

Answer 25

C — minimum recommended torque plus friction drag torque.

Question 26

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

Answer 26

A — Corrosion resisting steel.

Question 27

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

Answer 27

B — rejected.

Question 28

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

Answer 28

C — change washers and try again.

Question 29

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

Answer 29

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

Question 30

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

Answer 30

A — Dial indicator.

Question 31

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

Answer 31

A — Combination set.

Question 32

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

Answer 32

A — the threads to be clean and dry.

Question 33

33) 8264 Which statement regarding aircraft bolts is correct?

Answer 33

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

Question 34

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

Answer 34

A — AC 43.13-1B.

Question 35

35) 8265 Generally speaking, bolt grip lengths should be

Answer 35

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

Question 36

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

Answer 36

C — basic alloying element.

Question 37

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

Answer 37

C — 3.

Question 38

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

Answer 38

C — standard steel bolts.

Question 39

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

Answer 39

A — AN corrosion resistance steel bolt.

Question 40

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

Answer 40

B — NAS close tolerance bolt.

Question 41

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

Answer 41

A — the major alloying element.

Question 42

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

Answer 42

A — 1/2 inch.

Question 43

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

Answer 43

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

Question 44

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

Answer 44

A — 0.2851

Question 45

45) 8291. Identify the correct statement.

Answer 45

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

Question 46

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

Answer 46

B — Thickness gauge.

Question 47

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

Answer 47

C — .0001

Question 48

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

Answer 48

B — 1.436 inches.

Question 49

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

Answer 49

. C — small-hole gauge and determine the size of the hole by taking a micrometer reading of the ball end of the gauge.

Question 50

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

Answer 50

C — .2792

Question 51

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

Answer 51

A — Machinist scale.

Question 52

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

Answer 52

B — Micrometer caliper.

Question 53

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

Answer 53

B — thickness gauge.

Question 54

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

Answer 54

C —Telescopic gauge and micrometer.

Question 55

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

Answer 55

C — thickness gauge.

Question 56

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

Answer 56

B — Micrometer.

Question 57

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

Answer 57

B — Micrometer caliper.

Question 58

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

Answer 58

A — Gauge block.