MATERIALS, HARDWARE AND PROCESSES PART 2

Aircraft bolts are usually manufactured with a. class 1 fit for the threads. class 2 fit for the threads. class 3 fit for the threads.

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. exceed the recommended torque range by no more than 10 percent. tighten below the torque range. change washers and try again.

Aircraft bolts with a cross or asterisk marked on the bolthead are. made of aluminum alloy. close tolerance bolts. standard steel bolts.

When used in close proximity to magnetic compasses, cotter pins are made of what material?. Corrosion resisting steel. Anodized aluminum alloy. Cadmium-plated low carbon steel.

Torque values for aircraft bolts normally consider. the threads to be clean and dry. tightening the bolt head. lubricating the threads.

A bolt with a single raised dash on the head is classified as an. AN corrosion-resistant steel bolt. NAS standard aircraft bolt. NAS close tolerance bolt.

In the four-digit aluminum index system number 2024, the first digit indicates. the major alloying element. the number of major alloying elements used in the metal. the percent of alloying metal added.

Why is steel tempered after being hardened?. To increase its hardness and ductility. To increase its strength and decrease its internal stresses. To relieve its internal stresses and reduce its brittleness.

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

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

A part which is being prepared for dye penetrant inspection should be cleaned with. a volatile petroleum-base solvent. the penetrant developer. water-base solvents only.

The reheating of a heat treated metal, such as with a welding torch. has little or no effect on a metal's heat treated characteristics. has a cumulative enhancement effect on the original heat treatment. can significantly alter a metal's properties in the reheated area.

Select a characteristic of a good gas weld. The depth of penetration shall be sufficient to ensure fusion of the filler rod. The height of the weld bead should be 1/8 inch above the base metal. The weld should taper off smoothly into the base metal.

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

A fiber-type, self-locking nut must never be used on an aircraft if the bolt is. under shear loading. under tension loading. subject to rotation.

The aluminum code number 1100 identifies what type of aluminum?. Aluminum alloy containing 11 percent copper. Aluminum alloy containing zinc. 99 percent commercially pure aluminum.

Refer to Figure 43.) Identify the clevis bolt illustrated. 1. 2. 3.

Which of the following statements is true?. An aircraft part may be demagnetized by subjecting it to a magnetizing force from alternating current that is gradually reduced in strength. An aircraft part may be demagnetized by subjecting it to a magnetizing force from direct current that is gradually reduced in strength. An aircraft part may be demagnetized by subjecting it to a magnetizing force from alternating current that is gradually increased in strength.

Which of the following methods may be suitable to use to detect cracks open to the surface in aluminum forgings and castings?. Dye penetrant inspection and eddy current inspection. Dye penetrant inspection and magnetic particle inspection. Magnetic particle inspection and metallic ring inspection.

When installing a castle nut, start alignment with the cotter pin hole at the. minimum recommended torque without friction drag torque. maximum recommended torque minus friction drag torque. minimum recommended torque plus friction drag torque.

What metal has special short-time heat properties and is used in the construction of aircraft firewalls?. Stainless steel. Chrome molybdenum alloy steel. Titanium alloy.

The advantages of HI-LOK(tm) fasteners include. light weight, high fatigue resistance, high strength, and inability to be over-torqued. light weight, high fatigue resistance, high strength, and ease of removal and reuse. light weight, high damage tolerance, high strength, and inability to be over-torqued.

Liquid penetrant inspection methods may be used on which of the following?. Ferrous metals and nonporous plastics. Porous and nonporous plastics and nonferrous metals. Ferrous and nonferrous metals and nonporous plastics.

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. 1/2 inch. 1 inch. 1/4 inch.

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. percentage of the basic element in the alloy. percentage of carbon in the alloy in hundredths of a percent. basic alloying element.

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

A bolt with an X inside a triangle on the head is classified as an. NAS standard aircraft bolt. NAS close tolerance bolt. AN corrosion-resistant steel bolt.

(Refer to Figure 45.) What type weld is shown at B?. Butt. Double butt. Fillet.

Why is it considered good practice to normalize a part after welding?. To relieve internal stresses developed within the base metal. To increase the hardness of the weld. To remove the surface scale formed during welding.

When checking an item with the magnetic particle inspection method, circular and longitudinal magnetization should be used to. reveal all possible defects. evenly magnetize the entire part. ensure uniform current flow.

Which of the following factors are considered essential knowledge for X-ray exposure?. Processing of the film and its characteristics. Material thickness and density and the type of defect to be detected. Processing of the film, characteristics of X-ray machine used, and film characteristics.

Which tool can be used to measure the alignment of a rotor shaft or the plane of rotation of a disc?. Dial indicator. Shaft gauge. Protractor.

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

The pattern for an inclusion is a magnetic particle buildup forming. a fernlike pattern. a single line. parallel lines.

Magnetic particle inspection is used primarily to detect. distortion. deep subsurface flaws. flaws on or near the surface.

Which statement regarding aircraft bolts is correct?. 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. In general, bolt grip lengths should equal the material thickness. Alloy steel bolts smaller than 1/4-inch diameter should not be used in primary structure.

Holes and a few projecting globules are found in a weld. What action should be taken?. Reweld the defective portions. Remove all the old weld, and reweld the joint. Grind the rough surface smooth, inspect, and reweld all gaps/holes.

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

Which material cannot be heat treated repeatedly without harmful effects?. Unclad aluminum alloy in sheet form. 6061-T9 stainless steel. Clad aluminum alloy.