Corrosion In Aviation Practice Test

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• What does 'T' in an alloy designation stand for?
• Which statement about surface preparation and coating adhesion is most accurate?
• Exfoliation corrosion occurs along grain boundaries and causes which result?
• How is corrosion from non-clad aluminium alloys removed?
• What is fretting corrosion and where does it occur?
• Check the depth of the repair to determine if it is within the limits specified by the manual. If it is not within repair limits, you must consult which office?
• Tagging procedures for repaired components are to be carried out IAW what?
• What are common visual indicators of pitting corrosion?
• What is metal spraying?
• What is stress corrosion cracking (SCC) and why are certain aviation alloys susceptible?
• Dissimilar metal corrosion in the presence of sealants occurs how and how can it be prevented?
• Hydrogen embrittlement is a concern in aviation maintenance?
• Which coating fault is most likely to initiate underlying corrosion on aircraft surfaces?
• What does the term Alclad mean?
• How do water and humidity promote corrosion on a modern airframe?
• Before attempting corrosion removal, what should be cleaned from affected areas using a mild solvent such as Prepsol or Wax and Grease Remover?
• Why are aluminum alloys particularly vulnerable to corrosion in aircraft?
• How is corrosion from clad aluminium alloys removed?
• Why is it important to document corrosion findings and repairs?
• To conduct confined entry work, personnel must be what?
• What is the purpose of corrosion inhibitors in maintenance?
• What is anodizing and how does it improve corrosion resistance in aluminum?
• Why is corrosion prevention important for fuel systems?
• What are some common faults seen in aviation coatings that can lead to corrosion?
• How do you identify corrosion in fasteners and their interfaces in service?
• Which of the following is NOT a method of paint remover used in aviation?
• What is Parkerising?
• In a crevice under a gasket in an aircraft joint, which corrosion mechanism is most likely to occur?
• Which statement about galvanic corrosion is true?
• Before attempting removal of corrosion, affected areas cleaned of all paints, waxes, greases, oils and other substances using which mild solvent?
• Corrosion fatigue describes fatigue due to which condition?
• What is a corrosion control program and what activities does it include?
• Which area is commonly checked for corrosion in aircraft skin assemblies?
• Which mitigation measure is effective for corrosion in fastener holes?
• Name the main corrosion mechanisms relevant to aircraft structures.
• Exfoliation corrosion commonly results in delamination along which feature?
• What are the two principal classifications of alloys?
• Filiform corrosion occurs as which feature?
• What criteria determine whether to repair or replace corroded components?
• Which of the following is a property of metals that enables them to absorb energy by plastic deformation?
• When preparing a fuel tank for corrosion removal, which precaution is crucial to follow?
• Filiform corrosion is characterized by which feature?
• Which statement best describes magnesium alloys in corrosion concerns?
• In confined space terminology, what defines a breathing zone?
• How should moisture be controlled in avionics bays to prevent corrosion?
• What is the primary protective function of zinc chromate primer in aluminum structures?
• Fretting corrosion is caused by which scenario?
• What is the role of coatings in corrosion prevention?
• What are drying sealants and where are they used?
• Among the eight precautions for removing corrosion by chemical means, which item is NOT listed?
• Control cables are listed among areas needing extra attention for corrosion.
• What are the three essential elements of a corrosion cell?
• What is used to prevent fretting corrosion between contacting metal skin and panels?
• Solvent-type paint strippers are used in which situations?
• What is the purpose of proper surface preparation before coating aircraft surfaces?
• Which environmental conditions increase corrosion risk and shorten inspection intervals?
• Hydrogen embrittlement is a concern for aviation maintenance in which materials?
• Which property describes the quality of being capable of being liquefied by heat?
• When diluting acids, what important precaution should be followed?
• What does corrosion require in terms of electrolyte and contact?
• Which of the following statements best describes fretting corrosion protection between skin and panels?
• What are common signs of hidden corrosion that visual inspection may miss?
• To evaluate corrosion-related fatigue life, which data are integrated?
• Coatings degrade; what indicators would you look for?
• Which statement about galvanisation is accurate?
• Which corrosion removal method is preferred and why?
• The further an anode is away from a cathode on the galvanic series the ________ the damage.
• Which term describes dulling of the surface due to uniform attack?
• Which factor contributes to corrosion when fasteners are used with dissimilar metals?
• Which are the two methods of corrosion removal from ferrous materials?
• How do maintenance manuals promote consistency in inspection and repair?
• What are typical indicators that protective coatings are failing?
• How does differential aeration lead to corrosion?
• During chemical corrosion removal, why is an adequate supply of clean water always available?
• What are the three elements to a wax type paint remover?
• Crevice corrosion is driven by which mechanism?
• After the bond between the coating and metal is broken, what does the wax do?
• Why are fluoride-containing fluids problematic for titanium alloys?
• What is Parco-Lubrising?
• What does 'H' in an alloy designation stand for?
• Which statement correctly reflects the relative effectiveness of wax-type versus solvent-type paint strippers?
• What is 'slow crack growth' in the context of corrosion-fatigue?
• When performing chemical corrosion removal, why is it important to ensure that mixing and storage containers are compatible with the chemicals?
• Sealant mixing is carried out IAW?
• What is the role of corrosion inhibitors in avionics electronics?
• Wheel wells and landing gear are areas requiring extra attention for corrosion checks.
• What is the difference between surface corrosion and structural corrosion in terms of inspection?
• If a large cathode is in contact with a small anode, the resultant corrosion would be...
• Which statement correctly matches removal methods to aluminium alloys?
• Which manual states the allowable repair limits?
• Which safety item should always be available when removing corrosion chemically?
• What are pliable sealants and where are they used?
• Which statement is true regarding corrosion removal on magnesium alloys?
• Fretting corrosion occurs due to which mechanism and where is it commonly observed?
• What chemical is used to remove corrosion from titanium?
• What is crevice corrosion and where is it likely to occur on aircraft?
• What is uniform etch?
• How is corrosion-related fatigue life evaluated?
• What is the dwell time window for the phosphoric acid/water corrosion removal process?
• Which environmental condition most promotes crevice corrosion in aircraft cavities?
• What are the three sealant categories?
• In galvanic protection, which metal is anodic to steel?
• What must be checked after corrosion has been completely removed?
• The pure aluminium coating provides a dual purpose. What are they?
• What is used where faying surfaces are being fastened together?
• Pitting corrosion forms as localized anodic areas and may be detected by what signs?
• How should sealants be used to prevent dissimilar metal corrosion?
• What chemical removal procedure is used to remove corrosion from magnesium alloys?
• Which practice helps control corrosion in aircraft fuel systems?
• What does hydrogen embrittlement cause?
• Stress corrosion cracking involves which combination?
• What are common environmental sources of corrosion in aviation?
• What is a typical repair approach when corrosion is found on an aluminum skin?
• What are curing sealants?
• What are corrosion allowances?
• What is the typical sequence for addressing corrosion discovered during inspection?
• How does the lighting and drainage design influence corrosion risk?
• Galvanic corrosion occurs when dissimilar metals are in contact and an electrolyte is present. How is it usually recognized?
• What situation can accelerate the rate of corrosion?
• How can design changes reduce corrosion susceptibility?
• Which alloys are most susceptible to stress corrosion cracking in aviation applications?
• Which metal type is the worst affected by corrosion?
• What is the function of sealants and primers in corrosion prevention?
• Which area is identified as requiring extra attention when checking for corrosion?
• How is ultrasonic thickness gauging used to assess corrosion?
• What orders the list of metals in order of their electrical potential?
• What is corrosion in aviation structures?
• Which nondestructive testing method is used to detect surface cracks or discontinuities using magnetic particles when appropriate?
• What role do structural diagrams and maintenance manuals play in corrosion management?
• In electro-chemical attack, the material shed by the anode is partially accepted by the cathode.
• Intergranular corrosion primarily attacks which part of a metal?
• What is a sealant used for?
• Which statement about cathodic protection in aircraft structures is true?
• During electro-chemical corrosion, which statement best describes the transfer of metal between the anode and cathode?
• Which process describes the exposure of a metal surface to a conductive, corrosive medium causing the more active metal to become anodic and the less active metal to become cathodic?
• Exfoliation corrosion is a form of intergranular corrosion in layered or wrought alloys where what occurs?
• What is eddy current testing used for in corrosion inspection?
• Which mechanism is characterized by attack along grain boundaries due to heat treatment or impurities?
• What is intergranular corrosion and which alloys are at risk?
• Which of the following is a required consideration before corrosion removal begins?
• What is the wet napkin method?
• Direct chemical attack is defined as an attack arising from direct exposure of a bare metal surface to corrosive caustic liquids or gaseous agents.
• Under what conditions does galvanic corrosion occur in aircraft?
• Which sealant category is designed to resist solvents, petroleum products and high temperatures after curing?
• What is a common aesthetic feature of anodized aluminum surfaces?
• What method is used to remove corrosion off stainless steel?
• Intergranular corrosion tends to present with what observable by-product behavior?
• Microbiological corrosion is promoted by scum forming at the bottom of a fuel tank in contact with metal. Which observation is correct?
• What is the typical procedure for chemical removal of corrosion on iron and steel?
• What corrosion behavior is typical for titanium alloys in aggressive aviation environments?
• What indicates that a corroded aluminum skin area should be replaced rather than repaired?
• In a wax-type paint stripper, what role does the wax play?
• Describe pitting corrosion and its aircraft implications.
• What are the two general causes of corrosion?
• Unlike electro-chemical attack, direct chemical attack changes occur at
• Crevice corrosion is caused by which mechanism?
• Galvanic corrosion is typically identified by corrosion concentrated at what location?
• Which metals are specifically targeted for chemical removal using the phosphoric acid/water mixture?
• What is the purpose of alloying?
• Which inspection methods are used to detect corrosion in aircraft?
• What removal method should not be used on magnesium alloys?
• Why must extreme care be taken when inspecting magnesium parts?
• Which practice helps reduce crevice corrosion risk in aircraft components?
• What methods are commonly used to detect corrosion?
• Which statement about the three sealant categories is correct?
• Which statement describes the role of the anode and cathode in corrosion?
• Travel tags are filled out in accordance with which procedures?
• Explain exfoliation corrosion.
• Which statement best describes the initial action of a wax-type paint stripper?
• Which of the following lists the three methods of non-ferrous metal protection?
• What is the impact of corrosion on aircraft weight and performance?
• In aluminum skin repair, what step is performed after removing corrosion to sound metal?
• Which statement best describes the protection method for primary airframe structures?
• Which property allows deformation and return to original shape after load removal?
• What is electroplating?
• After rinsing in the chemical removal process, how should the item be dried?
• Which of the following is NOT listed as a common environmental source of corrosion in aviation?
• What is galvanisation?
• What is Alodine (chromate conversion coating) and its purpose?