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CLEANING & CORROSION CONTROL FINAL
MOCK TEST WITH ANSWER RATIONALES 2026
โ 8348. How may magnesium engine parts be cleaned? Answer: Wash with a commercial solvent, decarbonize, and scrape or grit blast. โ 8352. Which of the following are acceptable to use when utilizing chemical cleaning agents on aircraft? Answer: Cotton fiber wiping cloths when using a flammable agent and atomizing spray equipment โ 8353. Select the solvent used to clean acrylics and rubber. Answer: Aliphatic naphtha โ 8362. Which of the following are acceptable to use in cleaning anodized surfaces? Answer: Aluminum wool and fiber bristle brushes. โ 8368. Which of the following is an acceptable first step procedure to help prevent scratching when cleaning a transparent plastic surface?
Answer: Flush the surface with clean water โ 8369. What should be done to prevent rapid deterioration when oil or grease come in contact with a tire? Answer: Wipe the tire with a dry cloth followed by a washdown and rinse with soap and water. โ 8355. Caustic cleaning products used on aluminum structures have the effect of producing Answer: corrosion โ 8357. The rust or corrosion that occurs with most metals is the result of Answer: a tendency for them to return to their natural state โ 8359. Which of the listed conditions is NOT one of the requirements for corrosion to occur? Answer: The presence of a passive oxide film โ 8370. Galvanic corrosion is likely to be most rapid and severe when Answer: the surface area of the anodic metal is smaller than the surface area of the cathodic metal.
โ 8354. Fayed surfaces cause concern in chemical cleaning because of the danger of Answer: entrapping corrosive materials โ 8356. Fretting corrosion is most likely to occur Answer: when two surfaces fit tightly together but can move relative to one another. โ 8358. Which of the following are the desired effects of using Alodine on aluminum alloy? Answer: A slightly rough surface and increased corrosion resistance โ 8378. Spilled mercury on aluminum Answer: causes rapid and severe corrosion that is very difficult to control โ 8349 - 1. For which of the following reasons would a water break test be conducted? Answer: To make certain that a bare metal surface is thoroughly clean.
โ 8360. The lifting or flaking of the metal at the surface due to delamination of grain boundaries caused by the pressure of corrosion residual product buildup is called Answer: exfoliation โ 8363. Intergranular corrosion in aluminum alloy parts Answer: cannot always be detected by surface indications โ 8363 - 1. Which of the following may not be detectable even by careful visual inspection of the surface of aluminum alloy parts or structures? Answer: Intergranular corrosion โ 8364. What may be used to remove corrosion from highly stressed steel surfaces? Answer: Fine-grit aluminum oxide. โ 8349. When an anodized surface coating is damaged in service, it can be partially restored by Answer: chemical surface treatment โ 8365. A primary cause of intergranular corrosion is
Answer: A coating of linseed oil. โ 8350. Select the solvent recommended for wipedown of cleaned surfaces just before painting. Answer: Aliphatic naptha โ 8351. Nickel-cadmium battery cases and drain surfaces which have been affected by electrolyte should be neutralized with a solution of Answer: boric acid โ 8026 - 1. If registration numbers are to be applied to an aircraft with a letter height of 12 inches , what is the mini mum space required for the registration mark N1683C? Answer: 52 inches โ 8599 if masking tape is applied to an aircraft, such as trim spraying, and is left on for several days and/or exposed to heat , it is likely that the tape will Answer: Cure to the finish and be very different to remove. โ 8600 what is used to slow the drying time of some finishes and to prevent blush?
Answer: Retarder โ 8601 which type of coating typically includes phosphoric acid as one of its components at the time of application Answer: Wash primer โ (8602) Which properly applied finish topcoat is the most durable and chemical resistant? Answer: Polyurethane โ 8306 aluminum pigment in dope is used primarily to Answer: Reflect ultraviolet from the fabric โ 8604 a correct use for acetone is to Answer: Remove grease from fabric โ 8605 which of the following is hazardous associated with sanding on the fabric covered surfaces during the finishing process? Answer: Static electricity buildup โ 8606 when the humidity is low, what is likely to occur if unhydrated wash primer is applied to unpainted aluminum and then, about 30-40 minutes later, a finish topcoat is applied?
โ 8612 which statement is true regarding paint system compatibility? Answer: Old wash primer coats maybe overcoated directly with epoxy finishes. โ
