Composites
Muhtasari
A composite is what you get when two different materials are combined so that the result outperforms either one on its own. In graphic products this is everywhere: a foil-lined juice carton, a laminated menu, a chipboard shelf and a particleboard display unit all marry materials to gain a property a single material could not provide. The drinks carton borrows paper for stiffness and printing, plastic for sealing and a wafer of aluminium foil for a perfect barrier against light and air. None of them alone would keep juice fresh on a shelf.
This note covers the graphic-products composites objectives: what a composite is and how it is classified by the way its parts are combined; the properties that make composites so useful, such as barrier performance, strength-to-weight and rigidity; the environmental impact, which is dominated by the difficulty of separating bonded layers for recycling; and the two named families, foil-based composites and particle-based composites, with the everyday products each one makes possible.
Malengo
- demonstrate knowledge of composite materials and understand their classification, properties, environmental impact and uses
- demonstrate knowledge of the following composite materials: - foil based composites - particle based composites.
Maelezo ya Somo
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Tathmini ya Somo
Hongera kwa kukamilisha somo la Composites. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- What is a composite material? A. A single material used on its own B. Two or more materials combined so the result has better properties than either alone C. A material that has been recycled D. A pure metal foil Answer: B
- In a foil-based composite carton, what is the main job of the thin aluminium layer? A. To make the carton rigid B. To provide a printable branding surface C. To act as a barrier against light, oxygen, moisture and aroma D. To make the carton heat-sealable Answer: C
- Which of the following is a particle-based composite? A. Aluminium foil B. Chipboard (particleboard) C. Acrylic sheet D. Tracing paper Answer: B
- Why is MDF often chosen for painted display signage and cut letters? A. It has a strong visible wood grain B. It has smooth, grain-free faces and edges that machine cleanly and take paint well C. It is a foil-based composite D. It is fully transparent Answer: B
- Why is most foil-and-plastic composite packaging difficult to recycle? A. The materials biodegrade too quickly B. The bonded layers of different materials cannot easily be separated C. It contains no plastic D. It is too valuable to recycle Answer: B
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Vitabu Vinavyopendekezwa
Fanya Mazoezi ya Maswali ya Majaribio
Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Composites? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
Pakua Programu Kwenye Google Playstore
Kila kitu unachohitaji ili kufaulu katika JAMB, WAEC & NECO.
