MATERIALS, HARDWARE AND PROCESSES PART 1

Unless otherwise specified or required, aircraft bolts should be installed so that the bolthead is. upward, or in rearward direction. upward, or in a forward direction. downward, or in a forward direction.

Which type crack can be detected by magnetic particle inspection using either circular or longitudinal magnetization?. 45°. Longitudinal. Transverse.

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

Where is an AN clevis bolt used in an airplane?. For tension and shear load conditions. Where external tension loads are applied. Only for shear load applications.

The testing medium that is generally used in magnetic particle inspection utilizes a ferromagnetic material that has. high permeability and low retentivity. low permeability and high retentivity. high permeability and high retentivity.

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

Normalizing is a process of heat treating. aluminum alloys only. iron-base metals only. both aluminum alloys and iron-base metals.

Which heat-treating operation would be performed when the surface of the metal is changed chemically by introducing a high carbide or nitride content?. Tempering. Normalizing. Case hardening.

Which tool is used to find the center of a shaft or other cylindrical work?. Combination set. Dial indicator. Micrometer caliper.

Which condition indicates a part has cooled too quickly after being welded?. Cracking adjacent to the weld. Discoloration of the base metal. Gas pockets, porosity, and slag inclusions.

How is a clevis bolt used with a fork-end cable terminal secured?. With a shear nut tightened to a snug fit, but with no strain imposed on the fork and safetied with a cotter pin. With a castle nut tightened until slight binding occurs between the fork and the fitting to which it is being attached. With a shear nut and cotter pin or a thin self-locking nut tightened enough to prevent rotation of the bolt in the fork.

Alclad is a metal consisting of. aluminum alloy surface layers and a pure aluminum core. pure aluminum surface layers on an aluminum alloy core. a homogeneous mixture of pure aluminum and aluminum alloy.

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

Why should an aircraft maintenance technician be familiar with weld nomenclature?. So that accurate visual (pictorial) comparisons can be made. In order to gain familiarity with the welding technique, filler material, and temperature range used. In order to compare welds with written (non-pictorial) description standards.

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

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

Which of the following defects are not acceptable for metal lines?. Scratches or nicks on the inside of a bend less than 10% of wall thickness. Dents in straight section that are 10% of tube diameter. Dents in straight section that are 20% of tube diameter.

Which of the following occurs when a mechanical force such as rolling, hammering, or bending is repeatedly applied to most metals at room temperature?. The metals become artificially aged. The metals become stress corrosion cracked. The metals become strain or work hardened or cold worked.

(Refer to Figure 44.) Select the illustration which depicts a cold weld. 2. 3. 4.

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

(Refer to Figure 42.) Which of the bolthead code markings shown identifies an AN corrosion resistant steel bolt?. 1. 2. 3.

Generally speaking, bolt grip lengths should be. equal to the thickness of the material which is fastened together, plus approximately one diameter. equal to the thickness of the material which is fastened together. one and one half times the thickness of the material which is fastened together.

Under magnetic particle inspection, a part will be identified as having a fatigue crack under which condition?. The discontinuity pattern is straight. The discontinuity is found in a nonstressed area of the part. The discontinuity is found in a highly stressed area of the part.

The core material of Alclad 2024-T4 is. heat-treated aluminum alloy, and the surface material is commercially pure aluminum. commercially pure aluminum, and the surface material is heat-treated aluminum alloy. strain-hardened aluminum alloy, and the surface material is commercially pure aluminum.

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. re-torqued frequently. rejected. reused only in a different location.

When the specific torque value for nuts is not given, where can the recommended torque value be found?. AC 43.13-1. Technical Standard Order. AC 43.13-2.

What is generally used in the construction of aircraft exhaust collectors, stacks, and manifolds?. Stainless steel. Titanium. Aluminum.

(Refer to Figure 44.) Identify the weld caused by an excessive amount of acetylene. 4. 1. 3.

In magnetic particle inspection, a flaw that is perpendicular to the magnetic field flux lines generally causes. a large disruption in the magnetic field. a minimal disruption in the magnetic field. no disruption in the magnetic field.

What defects will be detected by magnetizing a part using continuous longitudinal magnetization with a cable?. Defects perpendicular to the long axis of the part. Defects parallel to the long axis of the part. Defects parallel to the concentric circles of magnetic force within the part.

Which of the following describe the effects of annealing steel and aluminum alloys?. Decreasing internal stresses and softening of the metal. Softening of the metals and improved corrosion resistance. Improved corrosion resistance.

Self-locking nuts may be used on aircraft provided that. the head of the bolt is safety wired. they are installed with a lock washer. the bolt or nut is not subject to rotation.

Which is an acceptable safety device for a castle nut when installed on secondary structures?. Star washer. Lockwasher. Cotter pin.

In performing a dye penetrant inspection, the developer. seeps into a surface crack to indicate the presence of a defect. acts as a blotter to produce a visible indication. thoroughly cleans the surface prior to inspection.

To detect a minute crack using dye penetrant inspection usually requires. that the developer be applied to a flat surface. a longer-than-normal penetrating time. the surface to be highly polished.

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

Which of the following materials may be inspected using the magnetic particle inspection method?. Copper alloys. Aluminum alloys. Iron alloys.

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

(Refer to Figure 45.) What type weld is shown at A?. Fillet. Butt. Lap.

One way a part may be demagnetized after magnetic particle inspection is by. subjecting the part to high voltage, low amperage ac. slowly moving the part out of an ac magnetic field of sufficient strength. slowly moving the part into an ac magnetic field of sufficient strength.