Ferrous metals Кистол

An engineer must select... for each machine member.

• suitable materials

• a workshop

• a plant

The characteristics of engineering materials depend upon ...

• their weight

• their colour

• the chemical composition and their physical structure

1. Cast iron is a general term applied to ​ (a)   .

2. Grey cast iron has the carbon present in the ​ (b)   or ​ (c)   state.

3. White cast iron has most of the carbon in the​ (d)   state.

4. Malleable cast iron is made by heating ​ (e)   for a period of several days in air- tight pots filled with an oxide of iron.

• iron-carbon alloys
• graphite
• free
• combined
• white iron casting
• semisteel
• oxide of irone

ПРОЧНОСТЬ, ВЯЗКОСТЬ

(a)  

упругость

(a)  

Сопротивление

(a)  

хрупкий, ломкий

(a)  

жесткость

(a)  

An engineer building a machine must choose appropriate materials for each part.

• true

• false

Copper is the most common metal in the world.

• true

• false