Finishing
Akopọ
A product is not finished when the last cut is made. Bare wood absorbs water and stains, bare steel rusts, and a rough surface looks unmade and feels unpleasant. Finishing is the final stage that protects the material from its environment and makes the product look and feel the way it should. Choosing the right finish, and preparing the surface properly first, is what separates a workshop exercise from a product someone would buy.
This note covers finishing for woods, metals and polymers: protective finishes that defend against moisture, corrosion and wear; decorative finishes that change colour and appearance; the all-important surface preparation that every finish depends on; and the idea of self-finishing materials such as acrylic and many polymers that need no added coating at all. It explains why each finish suits its material and how to match the finish to where the product will be used.
Awọn Afojusun
- select and use appropriate finishes for materials including: - decorative finishes - protective finishes
- show an understanding of self-finishing materials.
Akọ̀wé Ẹ̀kọ́
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
Ìdánwò Ẹ̀kọ́
Oriire fun ipari ẹkọ lori Finishing. Ni bayi ti o ti ṣawari naa awọn imọran bọtini ati awọn imọran, o to akoko lati fi imọ rẹ si idanwo. Ẹka yii nfunni ni ọpọlọpọ awọn adaṣe awọn ibeere ti a ṣe lati fun oye rẹ lokun ati ṣe iranlọwọ fun ọ lati ṣe iwọn oye ohun elo naa.
Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.
Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.
- What is the main purpose of a protective finish on mild steel? A. To make the steel heavier B. To form a barrier that keeps oxygen and moisture from the metal so it does not rust C. To soften the metal for bending D. To make the steel conduct electricity Answer: B
- Which material is described as self-finishing? A. Mild steel B. Natural softwood C. Acrylic (PMMA) D. Cast iron Answer: C
- Why must a surface be properly prepared before a finish is applied? A. Preparation is only needed for metals B. A finish over a dirty or greasy surface will not key and is likely to peel or look patchy C. Preparation makes the finish unnecessary D. It changes the colour of the finish Answer: B
- Which finish protects steel sacrificially, still working even if the coating is scratched? A. Clear lacquer B. Wood stain C. Zinc plating (galvanising) D. Danish oil Answer: C
- Which finish would best suit outdoor timber that needs to resist rot and weather? A. Sanding sealer only B. A preservative plus an exterior varnish or oil C. Polishing D. No finish, as wood is self-finishing Answer: B
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
Awọn Iwe Itọsọna Ti a Gba Nimọran
Ṣe Adaṣe Awọn Ibeere Idanwo Adaṣe
Ṣe o fẹ ṣe adaṣe awọn ibeere idanwo adaṣe nipa Finishing? Ṣe igbasilẹ ohun elo Green Bridge CBT lati wọle si awọn ibeere idanwo adaṣe ati awọn ayẹwo adaṣe kikun fun koko-ọrọ yii.
Ṣe igbasilẹ ohun elo naa lori Google Playstore
Gbogbo ohun ti o nilo lati ṣe dara julọ ninu JAMB, WAEC ati NECO.
