AC 43.13-1B – ACCEPTABLE METHODS, TECHNIQUES, AND PRACTICES AIRCRAFT INSPECTION

(CHAPTER 5. NONDESTRUCTIVE INSPECTION (NDI)) These inspection methods can be used for measurement of material thickness in aircraft parts and structures. Which one?. Eddy current. Penetrant. Ultrasonic. Magnetic particle.

(CHAPTER 5. NONDESTRUCTIVE INSPECTION (NDI)) This inspection type is used to detect surface cracks, pits, subsurface cracks, corrosion on inner surfaces, and to determine alloy and heat-treat condition. Which one?. Ultrasonic. Magnetic particle. Eddy current. Dye penetrant.

(CHAPTER 5. NONDESTRUCTIVE INSPECTION (NDI)) What kind of inspection is used to detect the loss of metal as a result of corrosion? An estimation of material loss due to corrosion can be made by comparison with thickness standards. Visual. Eddy current. Ultrasonic. Dye penetrant.

(CHAPTER 5. NONDESTRUCTIVE INSPECTION (NDI)) This inspection is a method for detecting cracks, laps, seams, voids, pits, subsurface holes, and other surface, or slightly subsurface, discontinuities in ferromagnetic materials. Which one?. Eddy current. Magnetic particle. Dye penetrant. Ultrasonic.

(CHAPTER 5. NONDESTRUCTIVE INSPECTION (NDI)) These are flaws where adhesive attaches to only one surface in an adhesive-bonded assembly. They can be the result of crushed, broken, or corroded cores in adhesive-bonded structures. These areas have no strength and place additional stress on the surrounding areas making failure more likely. Stress corrosion cracks. Delamination. Unbonds, or disbonds. Fatigue cracks.

(CHAPTER 5. NONDESTRUCTIVE INSPECTION (NDI)) The following characteristics should be considered when selecting these devices for visual inspection: foot-candle rating; explosive atmosphere rating; beam spread (adjustable, spot, or flood); efficiency (battery usage rate); brightness after extended use; and rechargeable or standard batteries. Which one?. Inspection mirrors. Flashlights. Simple magnifiers. Borescopes.

(CHAPTER 5. NONDESTRUCTIVE INSPECTION (NDI)) This inspection is used on nonporous metal and nonmetal components to find material discontinuities that are open to the surface and may not be evident to normal visual inspection. The part must be clean before performing a penetrant inspection. Which one?. Penetrant. Ultrasonic. Visual. Ultrasonic.

(CHAPTER 5. NONDESTRUCTIVE INSPECTION (NDI)) What type of cleaners are water solutions of chemicals that remove contaminants by chemical action or displacement rather than dissolving the contaminant?. Alkaline. Solvents. Detergents. Etching Chemicals.

(CHAPTER 6 – CORROSION, INSPECTION & PROTECTION) The following precautions should be taken when using any type of blasting equipment: Which one?. Operators should be adequately protected with complete face and head covering equipment, and sometimes provided with pure breathing air. Static-ground the dry abrasive blaster and the material to be blasted. Titanium alloys cuttings and small shavings can ignite easily and are an extreme hazard. Magnesium and high-tensile-strength aluminum create sparks during dry abrasive blasting.

(CHAPTER 6 – CORROSION, INSPECTION & PROTECTION) When required to use or handle solvents, special cleaners, paint strippers (strong alkalies and acids), etchants (corrosion removers containing acids), or surface activation material (Alodine 1200), observe the following safety precautions: Which one?. Avoid prolonged breathing of solvent or acid vapors. Never add acid to water. Always add water to acid. Clean water for emergency use should be available in the immediate work area after starting work. Equipment never should be effectively grounded where any flammable materials are being used.

CHAPTER 6 – CORROSION, INSPECTION & PROTECTION) What is the most common surface treatment of aluminum alloy surfaces?. Blasting. Alodizing. Anodizing. Iodizing.

(CHAPTER 6 – CORROSION, INSPECTION & PROTECTION) This type of corrosion is one of the most destructive and intense forms of corrosion. It can occur in any metal but is most common on metals that form protective oxide films, such as aluminum and magnesium alloys. Which one?. Concentration cell. Pitting. Filiform. Fretting.

(CHAPTER 6 – CORROSION, INSPECTION & PROTECTION) What type of corrosion is an attack on the grain boundaries of a metal? A highly magnified cross section of any commercial alloy shows the granular structure of the metal. Exfoliation. Galvanic. Inter-granular. Fatigue.

(CHAPTER 6 – CORROSION, INSPECTION & PROTECTION) Several standard mechanical and chemical methods are available for corrosion removal. Mechanical methods include hand sanding using abrasive mat, abrasive paper, or metal wool; and powered mechanical sanding, grinding, and buffing, using abrasive mat, grinding wheels, sanding discs, and abrasive rubber mats. What the method used depends upon?. The electrical flow of electrons. The mechanical working. The metal and degree of corrosion. The special treatment.

(CHAPTER 7 – AIRCRAFT HARWARE, CONTROL CABLES, AND TURNBUCKES) In general, bolt grip lengths of a fastener is the thickness of the material the fastener is designed to hold when two or more parts are being assembled. Bolts of slightly greater grip length may be used, provided washers are placed under the nut or bolt head. How much is the maximum combined height of washers that should be used?. 1/8 inch. 1/16 inch. ¼ inch. 3/8 inch.

(CHAPTER 7 – AIRCRAFT HARWARE, CONTROL CABLES, AND TURNBUCKES) 1. Be sure that the torque applied is for the size of the bolt shank not the wrench size. 2. Many applications of bolts in aircraft/engines require stretch checks prior to reuse. This requirement is due primarily to bolt stretching caused by overtorquing. With respect to the statements, mark the correct answer: Only 1 is true. Only 2 is true. Both are true. Any are true.

(CHAPTER 7 – AIRCRAFT HARWARE, CONTROL CABLES, AND TURNBUCKES) What nuts are commonly called speed nuts? They are used with standard and sheet metal self-tapping screws in nonstructural applications. They are used to support line and conduit clamps, access doors, etc. Their use should be limited to applications where they were originally used in assembly of the aircraft. Wingnuts. Sheet spring nuts. Checknuts. Self-locking nut plates.

(CHAPTER 7 – AIRCRAFT HARWARE, CONTROL CABLES, AND TURNBUCKES) When installing a castle nut, start alignment with the cotter pin hole at the minimum recommended torque plus friction drag torque. Do not exceed the maximum torque plus the friction drag. What do you do if the hole and nut castellation do not align?. Change washer and nut and try again. Change washer or nut and try again. Change bolt or screw. Adjust the nut until cotter pin hole align.

(CHAPTER 7 – AIRCRAFT HARWARE, CONTROL CABLES, AND TURNBUCKES) These bolts are only used in applications subject to shear stress, and are often used as mechanical pins in control systems. Which one?. Eyebolts. Close tolerance shear bolts. Clevis bolts. Engine bolts.

(CHAPTER 7 – AIRCRAFT HARWARE, CONTROL CABLES, AND TURNBUCKES) AN standard steel bolts are marked with either a raised dash or asterisk, corrosion resistant steel is marked by a single dash, and AN aluminum-alloy bolts are marked with…. A recessed dash. Two raised asterisk. Two raised dashes. A recessed triangle.

(CHAPTER 7 – AIRCRAFT HARWARE, CONTROL CABLES, AND TURNBUCKES) These nuts should not be used with bolts or screws on turbine engine airplanes in locations where the loose nut, bolt, washer, or screw could fall or be drawn into the engine air intake scoop. Which one?. Fiber or nylon locknuts. Self-locking castellated nuts. Self-locking nuts. Self-locking nut plates.

(CHAPTER 7 – AIRCRAFT HARWARE, CONTROL CABLES, AND TURNBUCKES) 1. When installing cable system turnbuckles, it is necessary to screw both threaded terminals into the turnbuckle barrel an equal amount. 2. Turnbuckle ends are designed for providing the specified cable tension on a cable system, and a bent turnbuckle would place undesirable stress on the cable, impairing the function of the turnbuckle. With respect to the statements, mark the correct answer: Only 1 is true. Only 2 is true. Both are true. Any are true.

(CHAPTER 8 – CLEANING AND CORROSION CONTROL) How appear the corrosion on the surface of aluminum alloys and magnesium?. A reddish corrosion by product commonly referred to as rust. The corrosion forms a greenish film. It appears as pitting and etching and is often combined with a gray or white powdery deposit. May appear etched and pitted, depending upon the length of exposure and severity of attack.

(CHAPTER 8 – CLEANING AND CORROSION CONTROL) This type of corrosion is a special form of oxygen concentration cell that occurs on metal surfaces having an organic coating system. It is recognized by its characteristic worm-like trace of corrosion products beneath the paint film. Which one?. Pitting. Surface. Filiform. Concentration cell.

(CHAPTER 8 – CLEANING AND CORROSION CONTROL) What may be used to neutralize acid deposits in lead-acid battery compartments and to treat acid burns from chemical cleaners and inhibitors?. Solution of bicarbonate of soda and water. Wash the area thoroughly with water and then apply bicarbonate of soda. A mixture of boric acid and water. Baking soda.

(CHAPTER 8 – CLEANING AND CORROSION CONTROL) There are two general classifications of corrosion that cover most of the specific forms. Which are these?. Dissimilar attack and micro-organism attack. Direct chemical attack and electrochemical attack. Physical loads and chemical attack. Anodic change and cathodic change.

(CHAPTER 8 – CLEANING AND CORROSION CONTROL) This form of corrosion involves constant or cyclic stress acting in conjunction with a damaging chemical environment. The stress may be caused by internal or external loading. Which one?. Intergranular Corrosion. Stress-Corrosion/Cracking. Fatigue Corrosion. Galvanic Corrosion.

(CHAPTER 11 – AIRCRAFT ELECTRICAL SYSTEMS) This device must be kept at a minimum and must be used to protect wire and cable from abrasion, chafing, exposure to fluid, and other conditions which could affect the cable insulation. Which one?. Metal stand-offs. Insulating tubing. Phenolic blocks. Rubber grommets.

(CHAPTER 11 – AIRCRAFT ELECTRICAL SYSTEMS) What is true with respect installing batteries?. Remove the grounding lead first for battery removal, then the positive lead. Remove the positive lead first for battery removal, then the grounding lead. Connect the positive lead of the battery last to minimize the risk of shorting the “hot terminal” of the battery during installation. Connect the grounding lead of the battery first to minimize the risk of shorting the “hot terminal” of the battery during installation.

(CHAPTER 11 – AIRCRAFT ELECTRICAL SYSTEMS) What is the process of electrically connecting conductive objects to either a conductive structure or some other conductive return path for the purpose of safely completing either a normal or fault circuit?. Bonding. Grounding. Grinding. Crimping.

(CHAPTER 11 – AIRCRAFT ELECTRICAL SYSTEMS) The resistance of the current return path through the aircraft structure is generally considered negligible. However, this is based on the assumption that adequate bonding to the structure or a special electric current return path has been provided that is capable of carrying the required electric current with a negligible voltage drop. What must you check to determine circuit resistance?. The input voltage should be maintained at a constant value. The voltage drop across the circuit. The input voltage and the output voltage are same. The amperage should be lower.

(CHAPTER 11 – AIRCRAFT ELECTRICAL SYSTEMS) All isolated conducting parts inside and outside the aircraft, having an area greater than 3 in2 and a linear dimension over 3 inches, that are subjected to appreciable electrostatic charging due to precipitation, fluid, or air in motion, should have a mechanically secure electrical connection to the aircraft structure of sufficient conductivity to dissipate possible static charges. How is named this procedure?. Metallic surface bonding. Static bonds. Grounding. Bonding jumpers.

(CHAPTER 11 – AIRCRAFT ELECTRICAL SYSTEMS) All conducting objects on the exterior of the airframe must be electrically connected to the airframe through mechanical joints, conductive hinges, or bond straps capable of conducting static charges and lightning strikes. Which one is an exception?. Grounds for Sensitive Circuits. Static bonds. Antenna elements. Single point grounds.