Manufactured Substances in the Industry (2)

Which of the following is not the purpose of alloying?

Antara berikut, yang manakah bukan sebab utama pengaloian?

• To make it chemically inert

  Lengai secara kimia

• To increase hardness and strength

  Untuk meningkatkan kekerasan dan kekuatan

• To resist corrosion

  Untuk menghalang hakisan

• To improve appearance

  Untuk memperbaiki rupa

Which of the following true about ceramics?

Antara berikut, yang manakah benar tentang seramik?

I. Organic non-metallic solid

Pepejal bukan logam organik

II. Inorganic non-metallic solid

Pepejal bukan logam inorganik

III. Example of compounds that formed ceramics is aluminium oxide

Contoh sebatian yang membentuk seramik adalah aluminium oksida

IV. Conduct electricity and heat

Boleh mengkonduksi elektrik dan haba

• I, III and / dan IV

• II, III and / dan IV

• II and / dan III

• III and / dan IV

Which of the following is the properties of ceramic?

Yang manakah antara berikut merupakan ciri-ciri seramik?

• Chemically inert and non-corrosive

  Tidak reaktif secara kimia dan tidak mudah mengakis

• Good conductor of heat

  Konduktor haba yang baik

• Unbreakable

  Tidak mudah pecah

• Non-heat resistant

  Tidak kalis haba tinggi

1. The body of an aeroplane is made from duralumin. Which of the following are the composition of duralumin?

• Copper and tin

• Copper and zinc

• Aluminium , copper, magnesium and manganese

• Iron, carbon and chromium

What is the main composition for making optical glass?

• SiO₂

• B₂O₃

• PbO

• Na₂O

Which of the following properties enable ceramic to be used in the manufacture of dentures?

• Has a high melting point

• Is a good heat insulator

• Can withstand compression

• Can withstand corrosion

Digital communication plays a very important role in modern living. Effective transmission of data, voices and images in a digital format requires a suitable material. What is the material?

• Ceramic glass

• Fibre optic

• Fibre glalss

• Photochromic glass

The glasses contained a layer of substance M. What is substance M?

• Lead (ll) oxide

• Silver chloride

• Calcium carbonate

• Boron oxide

Diagram 2 shows a crystal chandelier pendant light set found hanging in Madam Mariam's living room. State the type of glass which is more suitable to make the light in Diagram 2 and its reason.

• Fused glass , high heat resistance

• Borosilicate glass, high melting point

• soda lime glass , low melting point

• Lead crystal glass, High refractive index

Diagram 3 shows slow cooker. What is substances P and Q?

• Borosilicate glass, Ceramics

• Photochromic glass, steel

• Ceramics, Borosilicate glass

• Soda lime glass, stainless steel