Design & Technology (9-1) - 0979 CIE

Joining

Bayani Gaba-gaba

Very few products are made from a single piece. Almost everything around you is an assembly: parts that have been joined together, sometimes so they can be taken apart again and sometimes so they never will be. Knowing which joining method to use, and whether it should be temporary or permanent, is one of the most practical decisions a designer makes.

This note sorts joining methods into temporary (can be undone without damage) and permanent (cannot be undone without destroying the joint) for each class of material: papers and boards, woods, metals and polymers. You will learn the common methods, when each is the right choice, and how the same job can often be done either way depending on whether the product will ever need servicing, flat-packing or recycling.

Manufura

  1. show knowledge of temporary and permanent methods for joining the classes of materials listed in section 1.5.

Takardar Darasi

Before choosing a method, decide whether the joint must come apart again. A temporary joint can be undone without damaging the parts: a screw can be unscrewed, a bolt unbolted, a clip unclipped. Temporary joints are chosen wherever a product needs maintenance, repair, replacement of a worn part, flat-packing for transport, or separation for recycling. A permanent joint cannot be undone without destroying the joint or the parts: a weld, a riveted seam, a glued butt joint. Permanent joints are chosen for strength, for sealing, for security, and where the product is never meant to be dismantled. The same two parts could often be joined either way, so the deciding factor is the product's life, not the material.

Akwai a cikin manhajar Green Bridge

Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.

Cikakkiyar bayanan darasi tare da zane-zane
Mataimakiyar koyo da AI
Yi karatu ba tare da intanet ba, a kowane lokaci, a ko'ina
Akwai a Android, Windows, macOS, da Linux

Nazarin Darasi

Barka da kammala darasi akan Joining. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.

Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.

Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.

  1. Which of the following is a temporary method of joining? A. MIG welding B. Nut and bolt C. Pop riveting D. Solvent cementing acrylic Answer: B
  2. Why might a manufacturer choose knock-down (KD) fittings for a flat-pack cabinet? A. They are the strongest possible joint B. They are permanent and cannot be undone C. They allow the product to be transported flat and assembled and dismantled by the user D. They require welding equipment Answer: C
  3. Solvent cement joins acrylic by: A. Filling the gap with a separate metal B. Softening and fusing the two plastic surfaces so they harden as one C. Bolting the parts together D. Heating both parts until they melt completely Answer: B
  4. Which joining method is most appropriate for the strongest structural joint between two steel beams? A. Soldering B. Snap-fit C. Welding D. Double-sided tape Answer: C
  5. A mortise and tenon joint is strong mainly because: A. It uses a large amount of glue only B. It has a large gluing area and mechanically interlocks to resist racking C. It is held together by screws D. It can be undone easily Answer: B

Akwai a cikin manhajar Green Bridge

Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.

Cikakkiyar bayanan darasi tare da zane-zane
Mataimakiyar koyo da AI
Yi karatu ba tare da intanet ba, a kowane lokaci, a ko'ina
Akwai a Android, Windows, macOS, da Linux

Akwai a cikin manhajar Green Bridge

Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.

Cikakkiyar bayanan darasi tare da zane-zane
Mataimakiyar koyo da AI
Yi karatu ba tare da intanet ba, a kowane lokaci, a ko'ina
Akwai a Android, Windows, macOS, da Linux

Yi Aikin Tambayoyin Gwaji

Kana son yin aikin tambayoyin gwaji kan Joining? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.

Sauke Manhajar Daga Google Playstore

Duk abin da kake buƙata don yin fice a JAMB, WAEC & NECO.

Green Bridge CBT Mobile App
Keɓantaccen Mataimaki na Tattaunawa na Koyo na AI
Dubban Tambayoyi na JAMB, WAEC & NECO na Baya.
Fiye da Lura-Luran Darussa 1200
Tallafin Wajen Layi - Koyo Kowane Lokaci, Ko'ina
Jadawalin Gadar Kore.
Takaitaccen Bayanin Adabi & Tambayoyin Da Za Su Iya Tashi
Bibiye Ayyukanka da Ci Gaban Ka
Cikakken Bayani don Koyon Fahimta.