Grade 10 aviation ā Aircraft Tools and Materials Quiz
1. What is the main purpose of a riveting gun in aircraft construction?
A riveting gun drives rivets to join metal parts securely; cutting, measuring and painting are done with other tools.
2. What does a caliper (vernier or digital) measure in aircraft work?
Calipers measure internal and external distances such as diameters and thicknesses accurately, not surface roughness or electrical properties.
3. Why is aluminium commonly used for aircraft skin and structure?
Aluminium alloys offer a favourable strength-to-weight ratio and can be treated to resist corrosion, making them suitable for aircraft structures.
4. Which tool is used to tighten bolts to a specified value so they are not too loose or too tight?
A torque wrench applies a precise turning force (torque) to bolts, ensuring correct clamping without over- or under-tightening.
5. What is a composite material in aircraft construction?
Composites combine fibres and a matrix (resin) to make a strong, lightweight material used widely in modern aircraft.
6. What is the purpose of a deburring tool when working with sheet metal?
Deburring tools smooth rough or sharp edges left by cutting to prevent injury and ensure proper fitting of parts.
7. Why is corrosion protection important for aircraft materials in Kenya's coastal areas?
Coastal salt-laden air accelerates corrosion, so protective coatings and maintenance are vital to keep aircraft safe.
8. What is the function of cleco fasteners in assembling aircraft panels?
Clecos are temporary fasteners used during fitting and drilling to keep parts aligned until permanent fasteners are installed.
9. Which tool would you use to bend aluminium sheet accurately on a workbench?
A sheet metal brake provides controlled bending of aluminium sheets to the required angle without damaging the metal.
10. What is the main difference between a pop (blind) rivet and a solid rivet?
Blind (pop) rivets are installed from one side, useful where the rear side is inaccessible; solid rivets require access to both sides for bucking.
11. Which personal protective equipment (PPE) is essential when grinding metal on aircraft parts?
Grinding produces sparks, debris and noise; goggles, ear protection and gloves protect eyes, hearing and hands from injury.
12. What is the purpose of an anti-corrosion primer before painting an aircraft surface?
An anti-corrosion primer bonds to the metal and prevents moisture and chemicals from causing corrosion beneath the finish paint.
13. Why do aircraft technicians use a micrometer rather than a ruler for some measurements?
Micrometers give more precise readings than rulers, which is important for tight tolerances in aircraft parts.
14. What is lockwire (safety wire) used for on aircraft?
Lockwire secures fasteners so that vibration cannot turn them loose, helping maintain safety-critical assemblies.
15. Which material is commonly used for high-stress aircraft parts because of its strength and high temperature resistance?
Titanium has high strength, good fatigue resistance and withstands higher temperatures, making it suitable for critical aircraft components.
16. What is the purpose of an engineerās square or try square in aircraft workshops?
Squares are used to verify and mark perpendicular edges and fits, ensuring correct alignment of parts.
17. Why is cutting oil or lubricant used when drilling metal parts on an aircraft?
Cutting oil reduces heat and friction during drilling, protecting tools and producing cleaner holes.
18. What does the grit number on sandpaper indicate when preparing aircraft surfaces?
Grit numbers tell you how coarse or fine the abrasive is; higher grit gives a smoother finish which is important before painting.
19. Which tool is best for removing material along an edge to make it fit precisely (metalworking filing)?
A hand file is used to remove small amounts of metal and achieve accurate fits and smooth edges during assembly.
20. What is galvanic corrosion and why is it a concern in aircraft made of mixed metals?
Galvanic corrosion happens between dissimilar metals with an electrolyte (like salt water), so designers avoid certain metal combinations or add barriers.
21. Why is a hole reamer used after drilling a hole in aircraft components?
Reamers enlarge and finish drilled holes to exact sizes with smooth surfaces for rivets or bolts to fit properly.
22. What safety practice must be followed when using power cutting tools on aircraft parts?
Proper safety includes tying back hair, wearing PPE (goggles, gloves, ear protection) and securing parts to prevent accidents.
23. Which adhesive is commonly used to bond composite parts in aircraft construction?
Epoxy resins provide strong, durable bonds with composite materials and are widely used in aircraft manufacture and repair.
24. What is a jig or fixture used for in aircraft manufacturing?
Jigs and fixtures ensure repeatable accuracy and correct alignment when drilling, riveting or assembling parts.
25. Why must technicians deburr holes before installing rivets or bolts in an aircraft skin?
Deburring prevents stress concentrations that could lead to cracks and helps fasteners sit flush for structural integrity.
26. Which inspection tool is useful for checking small cracks or defects on aircraft parts during maintenance?
Magnification tools like borescopes or magnifying glasses help technicians detect small cracks or defects that are not visible to the naked eye.
27. Which material is most commonly used for aircraft skin and basic airframe panels in many Kenyan light aircraft and training planes?
Aluminium alloys are lightweight, strong and corrosionāresistant when treated, making them the usual choice for aircraft skins and panels.
28. Which tool is used to install pop (blind) rivets quickly in thin sheet metal?
A pop rivet gun (blind rivet tool) pulls the mandrel and sets the rivet from one side, ideal where only one side of the joint is accessible.
29. Which tool should you use to tighten a bolt to a specified value so the joint gets the correct clamp load?
A torque wrench applies a controlled turning force so bolts are tightened to the manufacturer's specified torque for safe clamping.
30. Which type of fastener allows frequent disassembly and reassembly of aircraft panels during maintenance?
Bolts and nuts can be removed and refitted many times, making them suitable where repeated access is needed during inspections and repairs.
31. Which inspection method is best for finding surface cracks on metal aircraft parts?
Dye penetrant (liquid penetrant) flows into surface cracks and makes them visible after proper cleaning and developer application.
32. Which material is widely used in modern aircraft for strong, lightweight composite structures?
Carbon-fibre composites combine high strength and low weight and are used for wings, fuselages and control surfaces on many modern aircraft.
33. What are clecos used for in sheet-metal aircraft construction?
Clecos are temporary fasteners that keep panels aligned during match drilling and riveting before permanent fasteners are installed.
34. What is the main purpose of applying an anti-corrosion primer to aircraft aluminium surfaces?
Anti-corrosion primers form a protective barrier to stop moisture and chemicals reaching the metal and causing corrosion.
35. What is a bucking bar used for when fitting solid rivets?
A bucking bar backs up the rivet so the shop-head (tail) can be upset when the factory head is hammered or hydraulically formed.
36. Which adhesive is commonly used in aviation for bonding composite parts and honeycomb cores?
Epoxy adhesives provide strong structural bonds, good environmental resistance and are widely used for bonding composites and honeycomb structures.
37. Which hand tool is best for cutting aluminium sheet in straight or curved lines during repair work?
Aviation snips are specially designed for cutting sheet metal cleanly and accurately without distorting the material.
38. What does 'deburring' mean when finishing drilled holes in aircraft structures?
Deburring smooths sharp edges left by drilling to prevent stress risers and damage to skin, seals or wiring.
39. Which wood was historically preferred for aircraft structures because of its good strength-to-weight ratio?
Spruce is light, strong and has predictable grain properties, so it was commonly used for spars and frames in older and some vintage aircraft.
40. Why is cutting or drilling aluminium usually done with lubricant or cutting fluid?
Lubricants reduce friction and heat, improve surface finish and help prevent the soft aluminium from sticking to the cutter.
41. What is the purpose of match drilling when assembling aircraft components?
Match drilling maintains precise hole alignment between parts by drilling through both parts together, reducing misalignment during assembly.
42. What does a countersink cutter do to a rivet or screw hole?
Countersinking removes material around a hole to allow flat-head screws or flush rivet heads to sit level with the skin.
43. Which non-destructive test uses high-frequency sound waves to detect internal flaws in wings or fuselage panels?
Ultrasonic testing transmits sound waves into a structure and detects reflections from internal defects such as cracks or delaminations.
44. Which fastener is designed for installation when you can only access one side of the joint?
Blind (pop) rivets are set from one side and expand on the blind side, making them ideal where the back side is inaccessible.
45. Which personal protective equipment is essential in an aircraft maintenance workshop to protect the eyes?
Eye protection prevents injury from flying metal chips, dust, chemicals and other hazards common in aircraft workshops.
46. What does 'annealing' do to a metal part used in aircraft construction?
Annealing involves controlled heating and cooling to soften metal for forming and to reduce residual stresses that could cause cracking.
47. Which hammer is commonly used for shaping and forming soft metal during aircraft sheet-metal work?
A ball peen hammer has a rounded end useful for metal forming, raising and planishing sheet metal without splitting it.
48. Which instrument is best for measuring the thickness of thin sheet metal to the nearest 0.01 mm in a school workshop?
A micrometer provides precise thickness measurements suitable for sheet metal tolerances used in aircraft construction.
49. What are 'prepregs' used in composite construction?
Prepregs are fibre fabrics pre-coated with resin and stored cold; they are laid up and cured under heat and pressure to make composite parts.
50. Why must bolts on critical aircraft joints be tightened to the manufacturer's specified torque?
Specified torque ensures proper clamp load; underā or overātorquing can lead to joint failure or bolt damage.
51. Which tool is most suitable for removing paint and light corrosion from a small area on an aircraft skin before inspection?
Sandpaper allows controlled removal of paint and corrosion without damaging the metal beneath when used correctly and carefully.