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Stuff Every Composites Scout Should Know: free practice in 30-second cards
Stuff Every Composites Scout Should Know
Practice facts for the Composite Materials merit badge. Not an official Scouting America credential.
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Free to start, no sign-up. 98 cards so far. One Knowledge Score and day streak across all your courses.
Questions people ask
Is this practice test free?
Yes. The first 50 cards are free for everyone with no sign-up, each with the answer, why it is right and its sources. Aha Trivia members get all 98 cards and timed practice exams.
How many practice questions are there?
98 practice questions so far. Each one is a 3-choice card that takes about 30 seconds, and the course grows as new cards pass our source checks.
Where do the answers come from?
Every card lists the sources it was checked against, and each answer explains why it is right. If you think an answer is wrong, tap "Challenge this answer" in the game and it gets reviewed.
Can I study in the car?
Yes. Voice mode reads the questions out loud and you answer by voice.
Try 3 cards
- What two main parts make up a typical engineered composite?
Show the answer
A matrix and a reinforcement. Composites pair a binder matrix with a reinforcement that adds strength or stiffness.
- Why are the ingredients in a composite still visible as separate parts?
Show the answer
They stay separate and distinct. Unlike mixtures or solutions, composite constituents remain separate and distinct in the finished structure.
- What is a composite with more than one distinct layer called?
Show the answer
A laminate. Layered composites are known as composite laminates.
All 98 practice questions
The first 50 are free, with the answer, why it's right and the official sources. The other 48 (🔒) open with a membership (every test). Or play them as a game and track what you've learned.
Show all 98 questions
- What two main parts make up a typical engineered composite?
- Why are the ingredients in a composite still visible as separate parts?
- What is a composite with more than one distinct layer called?
- What did the earliest composite bricks combine?
- What natural materials make up wood as a composite?
- What makes fibreglass both strong and flexible?
- What is the most common artificial composite material?
- Why is steel added to concrete to make reinforced concrete?
- What does a sandwich composite use between two stiff skins?
- What does the matrix do for the reinforcement?
- What is the reinforcement's job in a composite?
- What happens to a thermoset polymer matrix during curing?
- How does a thermoplastic matrix set its shape?
- Why are composites popular in aerospace parts?
- What is a common use of carbon composite in spacecraft?
- What is a common core material in sandwich composites?
- What does anisotropic mean for a composite's properties?
- What happens when a laminate separates between layers?
- What is fibre pull-out in a composite?
- What testing method uses sound waves to inspect composites?
- Why are composites tested before and after construction?
- What is a safety data sheet (SDS) used for?
- What should you do before working with a composite resin?
- Why is proper disposal of resins important?
- What is a likely hazard when handling composite materials?
- Who should supervise composite projects for safety?
- What should you do if unsure about a composite hazard?
- What does the rule of mixtures help estimate?
- Why is fibre alignment controlled in aerospace composites?
- What does particle reinforcement improve in a composite?
- Why are short fibres sometimes used instead of long ones?
- Why do carbon fibres have a high strength to density ratio?
- What does randomly orienting fibres do to a composite?
- What is a mould's job in composite fabrication?
- What is a common resin used in composites?
- What does a finishing coating like polyurethane do for a composite part?
- What is an example of a natural composite used in construction?
- What does a composite bow show about old composite use?
- What is an example of a particulate composite?
- What does a shape-memory polymer composite do when heated?
- What do high strain composites depend on for performance?
- Why are ceramic matrix composites built?
- What is a common polymer matrix material often called?
- What does wet lay-up typically produce in terms of resin and fibre?
- Why does the resin to fibre ratio matter in a composite?
- What did ancient Mesopotamians make by gluing wood at different angles?
- What is a robotic material?
- What is tooling in composite manufacturing?
- Why might a composite be chosen for a prosthetic lower leg?
- How many sections does the internationally agreed SDS format have?
- Which SDS section covers first aid measures? 🔒
- What does SDS section 8 address? 🔒
- Which SDS section tells you how to handle and store a material safely? 🔒
- What does SDS section 13 discuss? 🔒
- Why was the SDS format standardized internationally? 🔒
- Who does an SDS mainly serve? 🔒
- What does section 6 of an SDS help you plan for? 🔒
- What does section 2 of an SDS identify? 🔒
- What is fiberglass made of? 🔒
- Which resin types are commonly used as fiberglass matrices? 🔒
- How does fiberglass compare to carbon fiber in cost and flexibility? 🔒
- What is chopped strand mat made of? 🔒
- Why is a sizing coating applied to glass rovings? 🔒
- What happens if glass fibers do not bond well to the matrix? 🔒
- Which glass fiber type is most common in fiberglass? 🔒
- Why is E-glass a poor choice for marine applications? 🔒
- What is pultrusion used to make? 🔒
- What does filament winding typically produce? 🔒
- What must be removed from fiberglass lay-up to avoid trapped air? 🔒
- What is applied to a mold so the finished part releases cleanly? 🔒
- What symptoms can fiberglass exposure cause? 🔒
- How can workers be exposed to fiberglass? 🔒
- What vapor is released while fiberglass resins cure? 🔒
- What does the American Lung Association say about exposed fiberglass insulation? 🔒
- What is a composite material produced from? 🔒
- What is the oldest known composite material, over 6000 years old? 🔒
- Why are composites often chosen over common materials? 🔒
- What does a sandwich composite's thick core provide? 🔒
- What does a thermoset resin do differently from a thermoplastic when heated? 🔒
- What does filament winding use to lay down fibers? 🔒
- What does a high winding angle give a filament-wound pipe? 🔒
- What does the sizing on glass fibers help transfer to the resin? 🔒
- Why can a long glass fiber buckle easily in compression? 🔒
- What does symmetric use of fibers help minimize in a cured part? 🔒
- Which glass fiber type is chosen for high tensile strength in aircraft composites? 🔒
- Which glass fiber type resists chemical attack and is used in insulation? 🔒
- What is chopped strand mat processed with to make parts? 🔒
- What does chopped strand mat give fiberglass in the plane? 🔒
- What does fiberglass spray lay-up use to apply resin and glass? 🔒
- What does pultrusion do differently from extrusion? 🔒
- What can fiberglass rods do better than steel rods in oil pumping? 🔒
- Why must fiberglass rods be kept in tension? 🔒
- What are fiberglass storage tanks often lined with to resist chemicals? 🔒
- Why is fiberglass used to shroud antennas? 🔒
- What did fiberglass replace in aircraft radomes during World War II? 🔒
- What does SDS section 5 cover? 🔒
- What does SDS section 9 describe? 🔒
- What does SDS section 10 warn about? 🔒