Materials and Processes

C-flaws on or near the surface.

8219. Magnetic particle inspection is used primarily to detect

C-2, 3 5.

8220. 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.

C-1, 2, 3, and 5.

8221-1. 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.

C-Ultrasonic inspection.

8221. Which of these nondestructive testing methods is suitable for the inspection of most metals, plastics, and ceramics for and subsurface defects?

A-Eddy current inspection.

8222. 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?

C-Continuous.

8223. What method of magnetic particle inspection is used most often to inspect aircraft parts for invisible cracks and other defects?

B-Three.

8224. 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.

A-high permeability and low retentivity.

8225. The testing medium that is generally used in magnetic particle inspection utilizes a ferromagnetic material that has

C-It may be used with steels which have been heat treated for stressed applications.

8226. Which statement relating to the residual magnetizing inspection method is true?

B-Metallic ring test.

8227. 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 has cured?

A-Wet and dry process materials.

8228 What two types of indicating mediums are available for magnetic particle inspection?

C-3.

8229. Which of the following materials may be inspected using the magnetic inspection method? 1. Magnesium alloys. 2. Aluminum alloys. 3. Iron alloys. 4. Copper alloys. 5. Zinc alloys

B-slowly moving the part out of an AC magnetic field of sufficient strength.

8230. One way a part may be demagnetized after magnetic particle inspection is by

A-45°

8231. which type crack can be detected by magnetic particle inspection using either circular of longitudinal magnetization?

A-1, 4, 5, 6.

8232. What is 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.

A-The size and shape of the discontinuities being looked for.

8233-1. Which of the following is a main determinant of the dwell time to use when conducting a dye or fluorescent penetrant inspection?

B-a longer-than-normal penetrating time.

8233. To detect a minute crack using dye penetrant inspection usually requires

A-reveal all possible defects.

8234. When checking an item with the magnetic particle inspection method, circular and longitudinal magnetization should be used to

A-a large disruption in the magnetic field.

8235. In magnetic particle inspection, a flaw that is perpendicular to the magnetic field flux lines generally causes

C-was not thoroughly washed before the developer was applied.

8236. If dye penetrant inspections are not sharp and clear, the most probable cause is that the part

A-both No. 1 and No. 2 are true.

8237. (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,

C-parallel lines.

8238. The pattern for an inclusion is a magnetic particle buildup forming

A-a volatile petroleum-base solvent.

8239. A part which is being prepared for dye penetrant inspection should be cleaned with

C-The discontinuity is found in a highly stressed area of the part.

8240. Under magnetic particle inspection, a part will be identified as having a fatigue crack under which condition?

B-acts as a blotter to produce a visible indication.

8241. In performing a dye penetrant inspection, the developer

A-Defects perpendicular to the long axis of the part.

8242. What defects will be detected by magnetizing a part using continuous longitudinal magnetization with a cable?

A-Defects parallel to the long axis of the part.

8243. Circular magnetization of a part can be used to detect which defects?

C-both No. 1 and No. 2 are true.

8244. (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,

B-Intergranular.

8245. What type of corrosion may attack the grain boundaries of aluminum alloys when the heat treatment process has been improperly accomplished?

A-1, 2.

8246. 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.

A-Case hardening.

8247. Which heat-treating process of metal produces a hard, wear-resistant surface over a strong, tough core?

C-Case hardening.

8248. Which heat-treatment operation would be performed when the surface of the metal is changed chemically by introducing a high carbide or nitride content?

B-iron-base metals only.

8249. Normalizing is a process of heat treating

C-3.

8250. 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.

C-can significantly after a metal's properties in the reheat area.

8251. The reheating of a heat treated metal, such as with a welding torch

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

8252. Why is steel tempered after being hardened?

A-3003-F.

8253. What aluminum alloy designations indicate that the metal has received no hardening or tempering treatment?

C-Clad aluminum alloy.

8254. Which material cannot be heat treated repeatedly without harmful effects?

B-Slow cooling; low strength.

8255. What is descriptive of the annealing process of steel during and after it has been annealed?

A-clean, dry threads.

8256. Unless otherwise specified, torque values for tightening aircraft nuts and bolts relate to

C-Titanium alloy.

8257-1. What metal has special short-time heat properties and is used in the construction of aircraft firewalls?

A-Stainless steel.

8257. What is generally used in the construction of aircraft engine firewalls?

B-upward, or in a forward direction.

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

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

8259. Alcad is a metal consisting of

C-the bolt or nut are not subject to rotation.

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

C-subject to rotation.

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

C-basic alloying element.

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 steel. In the number "4130" designating chromium molybdenum steel, the first digit indicates the

C-3.

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

C-standard steel bolts.

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

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

8264. Which statement regarding aircraft bolts is correct?

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

8265. Generally speaking, bolt grip lengths should be

A-AC 43.13-1B.

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

B-3.

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

C-change washers and try again.

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-AN corrosion-resistant steel bolt.

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

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

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

C-Only for shear load applications.

8271. Where is an AN clevis bolt used in an airplane?

B-NAS close tolerance bolt.

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

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

8273. The core material of Alclad 2024-T4 is

C-99 percent commercially pure aluminum.

8274. The aluminum code number 1100 identifies what type of aluminum?

C-class 3 fit for the threads.

8275. Aircraft bolts are usually manufactured with a

A-the major alloying element.

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

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

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

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

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

C-3.

8278. (Refer to Figure 44.) Identify the weld caused by an excessive amount of acetylene.

B-2.

8279. (Refer to Figure 44.) Select the illustration which depicts a cold weld.

A-To relieve internal stresses developed within the base metal.

8280. Why is it considered good practice to normalize a part after welding?

B-Remove all the old weld, and reweld the joint.

8281. Holes and a few projecting globules are found in a weld. What action should be taken?

A-Cracking adjacent to the weld.

8282. Which condition indicates a part has cooled too quickly after being welded?

C-The weld should taper off smoothly into the base metal.

8283. Select a characteristic of a good gas weld.

B-Butt.

8285. (Refer to Figure 45.) What type weld is shown at A?

B-Double butt.

8286. (Refer to Figure 45.) What type weld is shown at B?

A-Lap.

8287. (Refer to Figure 45.) What type weld is shown at G?

B-25 to 50 percent.

8288. On a fillet weld, the penetration requirement includes what percentage(s) of the base metal thickness?

A-Dial indicator.

8289. Which tool can be used to measure the alignment of a rotor shaft or the plane of rotation of a disk?

A-0.2851.

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

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

8291. Identify the correct statement.

B-1.436 inches.

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

B-Thickness gauge.

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

C-.0001

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

A-Combination set.

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

B-.3004.

8296. (Refer to Figure 48.) What does the micrometer read?

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

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-.2792.

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

A-Machinist scale.

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

A-Gauge block.

8300. What tool is generally used to calibrate a micrometer or check its accuracy?

B-Micrometer caliper.

8301. What precision measuring tool is used for measuring and main bearing journal for out-of-round wear?

B-thickness gauge.

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

C-Telescopic gauge and micrometer

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

C-thickness gauge.

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

B-thickness gauge.

8305. The clearance between the piston rings and the ring lands is measured with a

B-Micrometer.

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

B-Micrometer caliper.

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

A-likely ambient exposure conditions and intended use of the part, along with type of weld and original part material composition.

8384-1. In examining and evaluating a welded joint, a mechanic should be familiar with

A-1/2 inch.

8384. 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