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5. What properties of ferrous metals can you name?
6. What are the most important properties of aluminium?
7. Where are aluminium alloys used?
8. What copper alloys do you know?
9. What are the most common representatives of non-metallic materi-
als?
10. What is the difference between thermoplastics and thermosets?
11. Can you name common engineering thermoplastics?
12. Why are the plastics properties indispensable?
13. How are ceramics formed?
14. Are ceramics good conductors of heat and electricity?
15. What should an engineer take into consideration while choosing a
material for the given purpose?
Exercise 22. Make up general and disjunctive questions, and answer them ac-
cording to the models to enhance your speaking skills.
Model A:
It is possible to use the term ‘metals’ instead of ‘alloys’.
Is it possible to use the term ‘metals’ instead of ‘alloys’? — Yes, it is.
It is possible to use the term ‘metals’ instead of ‘alloys’, isn’t it? — Yes,
it is.
1. It is necessary to divide engineering materials into various classes. 2. It
is a ductile metal. 3. It is a frequent element of various metal alloys. 4. It is a
representative of non-metallic materials. 5. It is used in industry.
Model B:
Metallic materials include ferrous and non-ferrous metals.
Do metallic materials include ferrous and non-ferrous metals? — Yes,
they do.
Metallic materials include ferrous and non-ferrous metals, don’t they?
— Yes, they do.
1. Different elements in alloys influence properties of materials. 2. Ceram-
ics tend to be strong and stiff. 3. Ceramics properties vary widely. 4. Com-
pounds consist of two or more elements. 5. Mixtures
include two or more ele-
ments or compounds.
Достарыңызбен бөлісу: 
