Materials & Process (1)

Which statement regarding aircraft bolts is correct? a. When tightening castellated nuts on drilled bolts, if the cotter pin holes do not line up, it is permissible to overtighten the nut to permit alignment of the next slot with the cotter pin hole b. In general, bolt grip lengths should equal the material thickness c. Alloy steel bolts smaller than ¼ -inch diameter should not be used in primary structure

How many of these factors are considered essential knowledge for** x-ray exposure?** • Processing of the film • Material thickness and density • Exposure distance and angle • Film characteristics a. One b. Three c. Four

What precision measuring tool is used for measuring crankpin and main bearing journals for out-of-round wear? a. Dial gauge b. Micrometer caliper c. Depth gauge

On a fillet weld, the penetration requirement includes what percentage(s) of the base metal thickness? a. 100 percent b. 25 – 50 percent c. 60 – 80 percent

What is descriptive of the annealing process of steel during after it has been annealed? a. Rapid cooling; high strength b. Slow cooling; low strength c. Slow cooling; increased resistance to wear

Which tool can be used to determine piston pin out of-round wear? a. Telescopic gauge b. Micrometer caliper c. Dial indicator

Which of the following is a main determinant of the dwell time to use when conducting a dye r fluorescent penetrant inspection? a. The size and shape of the discontinuities being looked for b. The size and shape of the part being inspected c. The type and/or density of the part material

Which statement relating to the residual magnetizing inspection method is true? a. Subsurface discontinuities are made readily apparent b. It is used in practically all circular and longitudinal magnetizing procedures c. It may be used with steels which have been heat treated for stressed applications

In examining and evaluating a welded joint, a mechanic should be familiar with a. Likely ambient exposure conditions and intended use of the part, along with type of weld and original part material composition b. The welding technique, filler material, and temperature range used c. The parts, proportions, and formation of a weld

**Circular magnetization of a part can be used to detect which defects? a. Defects parallel to the long axis of the part b. Defects perpendicular to the long axis of the part c. Defects perpendicular to the concentric circles of magnetic force within the part

(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, a. Only No.1 is true b. Only No.2 is true c. Both No.1 and No. 2 are true

In performing a dye penetrant inspection, the developer a. Seeps into a surface crack to indicate the presence of a defect b. Acts as a blotter to produce a visible indication c. Thoroughly cleans the surface prior to inspection

If it is necessary to accurately measure the diameter of a hole approximately ¼ inch in diameter, the mechanic should use a a. Telescoping gauge and determine the size of the hole by taking a micrometer reading of the adjustable end of the telescoping gauge b. 0 - to 1-inch inside micrometer and read the measurement directly from the micrometer c. Small-hole gauge and determine the size of the hole by taking a micrometer reading of the ball end of the gauge

What method of magnetic particle inspection is used most often to inspect aircraft parts for invisible cracks and other defects? a. Residual b. Inductance c. Continuous

What two types of indicating mediums are available for magnetic particle inspection? a. Iron and ferric oxides b. Wet and dry process materials c. High retentivity and low permeability material

If dye penetrant inspection indications are not sharp and clear, the most cause is that part a. Was not correctly degaussed before the developer was applied b. Has no appreciable damage c. Was not thoroughly washed before the developer was applied

What aluminum alloy designations indicate that the metal has received no hardening or tempering treatment a. 3003-F b. 5052-H36 c. 6061-O

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

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? a. Eddy current inspection b. Ultrasonic inspection c. Magnetic particle inspection

Unless otherwise specified, torque values for tightening aircraft nuts and bolts relate to a. Clean, dry threads b. Clean, lightly oiled threads c. Both dry and lightly oiled threads

How is the locking feature of the fiber type locknut obtained? a. By the use of an unthreaded fiber locking insert b. By a fiber insert held firmly in place at the base of the load carrying section c. By making the threads in the fiber insert slightly smaller than those in the load carrying section

When the specific torque value for nuts is not given, where can the recommended torque value be found? a. AC 43. 13-1B b. Technical Standard Order c. AC43. 13-2A

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

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 a. 1,2,3,4 and 5 b. 1,2 and 3 c. 1,2,3 and 5