wood_structures.json

[
	{
		"question": "How would you inspect for rot (decay)?",
		"options": [
			"Inspect for a dark discolouration of the wood surface or gray stains along the grain.",
			"Look for signs of termites.",
			"Apply a coating of oil and look for where it turns blue"
		],
		"answer": "Inspect for a dark discolouration of the wood surface or gray stains along the grain."
	},
	{
		"question": "What three forms of wood are used in aircraft?",
		"options": [
			"Solid, Laminated, and Plywood",
			"Square, Sheet, and Paper",
			"Particle board, Orientated Strand Board, and Composite"
		],
		"answer": "Solid, Laminated, and Plywood"
	},
	{
		"question": "What is a laminated wood assembly?",
		"options": [
			"Two or more layers glued together with the grain of all layers approximately parallel",
			"Two or more layers glues together with the grain of all layers approximately perpendicular",
			"Running the wood through a lamination machine"
		],
		"answer": "Two or more layers glued together with the grain of all layers approximately parallel"
	},
	{
		"question": "What specie of wood is used as a standard for strength?",
		"options": ["Spruce", "Pine", "Oak"],
		"answer": "Spruce"
	},
	{
		"question": "Are hard knots acceptable?",
		"options": [
			"Yes, within the specified limits",
			"Yes, always",
			"No, never"
		],
		"answer": "Yes, within the specified limits"
	},
	{
		"question": "Why is compression wood NOT acceptable?",
		"options": [
			"It is very prejudicial to strength",
			"It is too strong",
			"It is susceptible to dry rot"
		],
		"answer": "It is very prejudicial to strength"
	},
	{
		"question": "When are mineral streaks acceptable?",
		"options": [
			"If the inspection fails to reveal any decay",
			"When the inspection reveals decay",
			"When the wood is wet"
		],
		"answer": "If the inspection fails to reveal any decay"
	},
	{
		"question": "Why is it necessary to examine all stains and discolouration?",
		"options": [
			"To determine if the stains are harmless, preliminary, or advanced decay",
			"To determine if the stains are caused by fuel, oil, or hydraulic fluid",
			"To determine if the stains are oil based, or latex paint"
		],
		"answer": "To determine if the stains are harmless, preliminary, or advanced decay"
	},
	{
		"question": "What types of glues are used in aircraft wood structure repair?",
		"options": [
			"Casein, Epoxies, Phenol-formaldehyde, and Resorcinol Glue",
			"School Glue, Epoxy, White Glue, and Liquid Nails",
			"Glue is not used, only nails"
		],
		"answer": "Casein, Epoxies, Phenol-formaldehyde, and Resorcinol Glue"
	},
	{
		"question": "What type of glue may have been used in OLDER AIRCRAFT construction that requires careful inspection to detect deterioration?",
		"options": ["Casein Glue", "Epoxy", "Phenol-formaldehyde"],
		"answer": "Casein Glue"
	},
	{
		"question": "What types of glue are used in MODERN AIRCRAFT wood structure repair?",
		"options": [
			"Resorcinol glue, Phenol-formaldehyde glue, and Epoxy resin glue",
			"School glue, Epoxy Resin, and Casein",
			"Resorcinol glue, Phenol-formaldehyde glue, and Casein"
		],
		"answer": "Resorcinol glue, Phenol-formaldehyde glue, and Epoxy resin glue"
	},
	{
		"question": "What is the minium °F for curing wood joints with resin glue?",
		"options": [
			"70°F or as specified by the glue manufacturer",
			"0°F or as specified by the glue manufacturer",
			"100°C or as specified by the glue manufacturer"
		],
		"answer": "70°F or as specified by the glue manufacturer"
	},
	{
		"question": "Why is it important to consider the open-assembly time when gluing wooden structures?",
		"options": [
			"Because if the maximum open-assembly time is exceeded the joint may fail since the glue may begin setting up before the joint is assembled",
			"Because if the maximum open-assembly time is exceeded the glue will leach into the surrounding wood and stain the surface",
			"Because if the maximum open-assembly time isn't exceeded the joint will fail as the glue didn't have enough time to cure"
		],
		"answer": "Because if the maximum open-assembly time is exceeded the joint may fail since the glue may begin setting up before the joint is assembled"
	},
	{
		"question": "Why is it important to apply the proper clamping pressure to a glue joint?",
		"options": [
			"Clamping forces the air out, brings the wood surfaces together evenly and in part responsible for the strength of the glue line",
			"To prevent the wood from splitting",
			"To ensure the wood is not compressed"
		],
		"answer": "Clamping forces the air out, brings the wood surfaces together evenly and in part responsible for the strength of the glue line"
	},
	{
		"question": "Describe the acceptable methods used to repair elongated bolt holes found in a wooden wing spar?",
		"options": [
			"Remove the damaged section and splice in a new section or replace the entire spar",
			"Fill the holes with resin and redrill the holes",
			"Drill the hole bigger and use a bigger bolt"
		],
		"answer": "Remove the damaged section and splice in a new section or replace the entire spar"
	},
	{
		"question": "Describe the characteristics of a scarf joint.",
		"options": [
			"The pieces to be joined are tapered or bevelled to a slope of 1 to 10 or 1 to 12",
			"The pieces to be joined are tapered or bevelled to a slope of 1 to 20 or 1 to 24",
			"The pieces to be joined are tapered or bevelled to a slope of 10 to 1 or 12 to 1"
		],
		"answer": "The pieces to be joined are tapered or bevelled to a slope of 1 to 10 or 1 to 12"
	},
	{
		"question": "What are the results of insufficient gluing pressure?",
		"options": [
			"Thick glue and a weak joint",
			"Thin glue and a strong joint",
			"Thin glue and a weak joint"
		],
		"answer": "Thick glue and a weak joint"
	},
	{
		"question": "What methods are used to apply pressure to wood glue joints?",
		"options": [
			"Clamps, Brads, Nails, Elastic Straps, Weight, Vacuum Bags, Screws, and Electric and Hydraulic power presses",
			"Air Compressor",
			"Stress"
		],
		"answer": "Clamps, Brads, Nails, Elastic Straps, Weight, Vacuum Bags, Screws, and Electric and Hydraulic power presses"
	},
	{
		"question": "What type of joint is used in splicing structural members?",
		"options": ["A scarf joint", "It is never acceptable to splice structural members", "A butt joint"],
		"answer": "A scarf joint"
	},
	{
		"question": "What areas of a wood spar may NOT be spliced?",
		"options": [
			"Under a wing attachment, landing gear, engine mount, and lift strut fittings",
			"Anywhere structural",
			"Around the windows"
		],
		"answer": "Under a wing attachment, landing gear, engine mount, and lift strut fittings"
	},
	{
		"question": "What are the two primary uses for plywood in aircraft construction?",
		"options": [
			"Gusset Plates and Aircraft Skin",
			"Aircraft Skin and Windows",
			"Gusset Plates and Windows"
		],
		"answer": "Gusset Plates and Aircraft Skin"
	},
	{
		"question": "Provide examples of at least three types of aircraft skin repair.",
		"options": [
			"Scarf, Surface, Plug, and Splayed and Scarfed Patches",
			"Scarf, Plug, Sand Smooth",
			"Sand Smooth, Paper Over, Paint"
		],
		"answer": "Scarf, Surface, Plug, and Splayed and Scarfed Patches"
	},
	{
		"question": "What type of patch should be used to repair small holes in thin plywood skin if the skin is less than 1/10 inch thick?",
		"options": ["A splayed patch", "Paint over", "Paper over"],
		"answer": "A splayed patch"
	},
	{
		"question": "Why must the bevelled cut be accurate on both pieces of wood being repaired with a scarfed joint?",
		"options": [
			"The pieces must match exactly to ensure a tight glue joint",
			"The pieces must match exactly to ensure a windproof joint",
			"The pieces must match exactly to ensure a waterproof joint"
		],
		"answer": "The pieces must match exactly to ensure a tight glue joint"
	},
	{
		"question": "Name at least three different types of defects found in wood.",
		"options": [
			"Knots, Checks, Decay, Splits, Pitch Pockets, Curly Grain, Cross Grain, and Dry Rot",
			"Paint, Stain, Insects, Dry Rot, Decay, Splits, and Knots",
			"Paint, Hair, Gray, Sun Worn, Peeling Paint"
		],
		"answer": "Knots, Checks, Decay, Splits, Pitch Pockets, Curly Grain, Cross Grain, and Dry Rot"
	},
	{
		"question": "Why should the various pieces or wood be kept at room temperature for at least 24 hours prior to joining?",
		"options": [
			"To allow the moisture content to equalize, minimizing the dimensional changes in the wood",
			"To allow the moisture content to equalize, minimizing splitting",
			"To allow the temperature to equalize, minimizing the dimensional changes in the wood"
		],
		"answer": "To allow the moisture content to equalize, minimizing the dimensional changes in the wood"
	},
	{
		"question": "What is the maximum number of splices that should be made in any one spar?",
		"options": ["Two", "Six", "Spars should not be spliced"],
		"answer": "Two"
	},
	{
		"question": "Always splice and reinforce plywood webs with what type of wood?",
		"options": [
			"The same type of plywood as the original",
			"Oak",
			"Spruce"
		],
		"answer": "The same type of plywood as the original"
	},
	{
		"question": "Why are light steel bushings sometimes used in wooden structures?",
		"options": [
			"To prevent crushing the wood when the bolts are tightened",
			"To save weight",
			"The light steel bushings are cheapest"
		],
		"answer": "To prevent crushing the wood when the bolts are tightened"
	},
	{
		"question": "What is the purpose of large surface area washers when used on wooden structures",
		"options": [
			"To provide additional bearing area for hardware to help preclude damage to the wood when the hardware is tightened",
			"To improve aerodynamic efficiency",
			"To provide a more weather resistant seal to reduce the risk of decay"
		],
		"answer": "To provide additional bearing area for hardware to help preclude damage to the wood when the hardware is tightened"
	},
	{
		"question": "What method will prevent a patch and a plywood pressure plate from adhering together due to extruding glue from the patch?",
		"options": [
			"The use of waxed paper or vinyl plastic between the patch and pressure plate",
			"The use of water or oil between the patch and the pressure plate",
			"The use of a mixture of sodium chloride and dihydrogen monoxide between the patch and pressure plate"
		],
		"answer": "The use of waxed paper or vinyl plastic between the patch and pressure plate"
	},
	{
		"question": "Name several facings and core material used in bonded honeycomb structures interned for special applications.",
		"options": [
			"Stainless steel, Titanium, Plywood, Glass, Nylon, and cotton cloth",
			"Oil, Polyurethane, Plastic, Silicon, Soda",
			"Polyurethane, Silicon dioxide, Glass, ALuminum, Tin Foil"
		],
		"answer": "Stainless steel, Titanium, Plywood, Glass, Nylon, and cotton cloth"
	},
	{
		"question": "Describe the construction of a bonded honeycomb structure",
		"options": [
			"It is a laminated structure that has a solid facing bonded to either side of a core consisting of open six-sided cells",
			"It is two honeycombs bonded at 45 degrees",
			"It is a laminated structure that has a solid facing bonded to either side of a core consisting of open eight-sided cells"
		],
		"answer": "It is a laminated structure that has a solid facing bonded to either side of a core consisting of open six-sided cells"
	},
	{
		"question": "A drill bit is used for drilling composites should operate at approximately what speed?",
		"options": ["20,000 RPM", "20 RPM", "200,000 RPM"],
		"answer": "20,000 RPM"
	},
	{
		"question": "What are the most common causes for delamination of a composite structure",
		"options": [
			"Sonic vibration, Expansion of internal moisture, liquid leakage, and manufacturing error",
			"Heavy landing, Lightning strike, bird strike",
			"The bees made the honeycomb weak"
		],
		"answer": "Sonic vibration, Expansion of internal moisture, liquid leakage, and manufacturing error"
	},
	{
		"question": "What type of defect in, or damage to, a bonded honeycomb structure can be repaired using the potted repair method?",
		"options": ["Filling a hole", "Repairing a crack", "Repairing delamination"],
		"answer": "Filling a hole"
	},
	{
		"question": "Name some factors that cause crazing in transparent plastic windows and wind-shields.",
		"options": [
			"Exposure to UV, stress, improper solvents, and improper handling",
			"A crazy pilot flys the plane, a wasp lands on the window, and the aeroplane is stored in the hanger",
			"The window gets too cold, someone touches the window, the window is cleaned with a dry microfibre"
		],
		"answer": "Exposure to UV, stress, improper solvents, and improper handling"
	},
	{
		"question": "How should a hole be drilled in Plexiglass to avoid damage to the hole when the drill breaks through to the underside?",
		"options": [
			"Backup the plastic with a piece of wood and feed the drill slowly",
			"Apply isopropyl alcohol to the back",
			"Drill at a high speed with lots of force"
		],
		"answer": "Backup the plastic with a piece of wood and feed the drill slowly"
	},
	{
		"question": "What should be done to twist drills that are to be used for drilling completely through Plexiglass?",
		"options": [
			"Drill free of burrs, drill angle of 150 degrees, feed the drill slowly",
			"Drill as fast as possible, use methanol as a lubricant",
			"Drill with a plastic drill bit"
		],
		"answer": "Drill free of burrs, drill angle of 150 degrees, feed the drill slowly"
	}
]