What is the process of chemically linking smaller repeating units (monomers) to form a large chain called?, A) Firing, B) Polymerization, C) Decomposition, D) Vulcanization, Which of the following is a naturally occurring polymer?, A) Polyethene (PE), B) Nylon, C) Polystyrene (PS), D) Silk, Which polymer structure consists of long, single chains?, A) Linear polymer, B) Low-branched polymer, C) Cross-linked polymer, D) Single-chain monomer, Plastics that can be repeatedly softened by heating and reshaped upon cooling are classified as:, A) Thermoplastics, B) Thermosets, C) Advanced ceramics, D) Non-biodegradable composites, Which synthetic polymer is commonly used for manufacturing raincoats, wire/cable casing, and pipes?, A) Polychloroethene (PVC), B) Polypropene (PP), C) Polytetrafluoroethene (PTFE), D) Polystyrene (PS), Which type of plastic cannot be remelted or reshaped after it has been formed?, A. Thermoplastic, B. Natural polymer, C. Thermoset, D. Monomer, Which statement correctly describes most ceramics?, A. They are soft and flexible., B. They melt at low temperatures., C. They are hard but brittle., D. They are good electrical conductors., What property makes low-branched polymers denser and stronger than highly-branched polymers?, A) Low-branched chains can pack more closely together, B) Highly-branched polymers have rigid cross-bonds, C) Low-branched polymers have lower molecular weights, D) Highly-branched polymers melt at much higher temperatures, A manufacturer needs a lightweight, non-corrosive, and high-strength material to fabricate boat hulls and swimming pools. Which material combination is best suited for this task?, A) Pure structural clay fired at low temperatures, B) Polystyrene foam mixed with low-density polyethene, C) Fiberglass (glass fibers embedded in a plastic matrix), D) Unreinforced concrete with high water permeability, Concrete is strong under compression but can crack when stretched. What should builders add to improve its tensile strength?, A. Plastic bottles, B. Ceramic tiles, C. Steel bars or mesh, D. Rubber sheets, An aircraft designer needs a material that is extremely strong, lightweight, and resistant to corrosion. Which material would be most suitable?, A. Traditional clay, B. Polystyrene, C. Reinforced concrete, D. Carbon-fiber composite, A community has a serious problem with plastic waste that microorganisms cannot decompose. Which solution would best address the problem?, A. Burn all the plastic outdoors., B. Throw the plastic into the sea., C. Use biodegradable polymers and practise reuse and recycling., D. Mix the plastic with ceramic materials., A technician needs a material that can resist high temperatures and prevent the flow of electricity. Which material is the best choice?, A. Ceramic, B. Copper, C. Nylon, D. Steel, A clay flowerpot allows water to pass slowly through its surface. Which property of ceramics explains this observation?, A. Ceramics are elastic., B. Ceramics are naturally porous., C. Ceramics have low melting points., D. Ceramics conduct electricity easily., Ceramics are mainly classified as which type of material?, A. Organic and metallic, B. Inorganic and non-metallic, C. Organic and flexible, D. Metallic and biodegradable

M3

oleh
Cetak
Menyematkan

Papan Peringkat

Gaya visual

Pilihan

Berganti templat

Pulihkan simpan otomatis: ?