Вступ до методичних рекомендацій

Ex. 10. Fill in the blanks using words in brackets:

1. 
   are described; b) copper; c) light weight; d) tin; e) a soft
   

1. 
   Brasses are yellowish or reddish alloys of … and zinc in different proportions.
   
2. 
   Characteristics of non-ferrous metals are thermal conductivity, high corrosion resistance, … etc.
   
3. 
   The metals most frequently used to make non – ferrous castings are: copper, …, zinc, lead, etc.
   
4. 
   Some of the basic non – ferrous metals …below.
   
5. 
   Alluminium is …silvery white metal.
   

Ex.11 Put questions to get the following answers:

1. 
   The metals most frequently used to make non-ferrous metal castings are copper, tin, zinc, lead, nickel, gold and aluminium
   
2. 
   Copper is used for making electrical contacts and wires, pipes, telephone cables, etc.
   
3. 
   Aluminium is a soft, silvery white metal.
   
4. 
   An addition of tin makes brasses stronger.
   
5. 
   5. Bronze is an alloy containing primarily copper and tin, but other elements may be added to the alloy.
   
6. 
   The metals that alloy freely with aluminium are copper, zinc and iron.
   

IV. Comprehension


Ex.12. Agree or disagree with the following statements:

1. 
   Copper is a reddish – brown tough metal.
   
2. 
   Non-ferrous metals are very cheap.
   
3. 
   An addition of alluminium makes brasses stronger.
   
4. 
   All – ferrous castings will take a high polish and will not rust so easily as the ferrous metals.
   
5. 
   The metal most frequently used to make non-ferrous metal castings is copper.
   
6. 
   Usually where aluminium alloys are made the aluminium predominates.
   
7. 
   Aluminium is a strong, yellow metal.