Aircraft Materials & Construction PDF

1) Wood was among the first materials used to construct aircraft. Answer: TRUE 2) Most aircraft built during World War I were constructed of metal frames Answer: FALSE 3) The lack of suitable corrosion-resistant materials was a reason why wood was the material of choice for aircraft construction i...

1) Wood was among the first materials used to construct aircraft. Answer: TRUE 2) Most aircraft built during World War I were constructed of metal frames Answer: FALSE 3) The lack of suitable corrosion-resistant materials was a reason why wood was the material of choice for aircraft construction into the 1930s Answer: TRUE 4) Inspection of wood structures should take place in a wet, poorly ventilated hangar. Answer: FALSE 5) A borescope is an optical instrument designed to assist visual inspection of narrow, difficult-to-reach cavities. Answer: TRUE 6) The ideal range for moisture in wood structures is 15-20%. Answer: FALSE 7) Glue tends to deteriorate with age, extreme temperatures, and mechanical forces. Answer: TRUE 8) Darker colored aircraft experience higher skin temperatures and heat buildup within their structure. Answer: TRUE 9) Glued joints are generally designed to take compression loads Answer: FALSE 10) Glued joints may fail in service due to excessive mechanical loads or accidents. Answer: TRUE 11) It is generally desirable to apply adhesive to only one surface when making a satisfactorily bonded joint. Answer: FALSE 12) The surfaces to be joined must be clean, dry, and free from grease, oil, wax, and paint for proper gluing. Answer: TRUE Multiple Choice 1) What material was commonly used to construct airplanes during World War I? Answer: Wood 2) Why was wood the material of choice for aircraft construction into the 1930s? 3) Where should the inspection of wood structures take place? Answer: Dry, well-ventilated hangar 4) Which wood types are commonly used in aircraft construction? A. Solid wood B. Plywood with high-density material C. Laminated wood D. All of the above Answer: D 5) What is the ideal range of moisture percentage in aircraft wood structures? Answer: 8-12% 6) What is the purpose of using a borescope during inspection? A. To assist in visual inspection of narrow, difficult-to-reach cavities B. To check for compression cracks in spars C. Both A and B D. None of the above Answer: C 7) What is a common factor in premature glue deterioration in wood structures? A. Chemical reactions caused by aging or moisture B. Mechanical forces caused by wood shrinkage C. Development of fungal growths D. All of the above Answer: D 8) What is the purpose of tapping the subject area with a light plastic hammer during inspection? A. To produce a sharp solid sound B. To check for hollow and dull sounds C. Both A and B D. None of the above Answer: C A. Lack of suitable corrosion-resistant materials for all-metal aircraft B. Slow development of strong, lightweight metal aircraft structures C. Both A and B D. None of the above Answer: C 9) Why should all protective coatings of paint be removed when inspecting glue lines? A. To expose the glue line for inspection B. To check for signs of deteriorating adhesives C. Both A and B D. None of the above Answer: C 10) What is the main reason for glue deterioration in aircraft structures? A. Age B. Moisture C. Extreme temperatures D. All of the above Answer: D 11) Which instrument is designed to assist visual inspection of narrow, difficult-to-reach cavities? Answer: Borescope 12) What range of moisture percentage in wood structures provides an environment for the growth of fungus/molds? Answer: Over 20% 13) What should be utilized to check for moisture in the wood? Answer: Moisture meter