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10. What is it in each of these sentences?

1. IT

occurs in fast flowing liquids that have a high level of turbulence.

2. IT

occurs over the whole surface

3. IT

occurs in or around a break in the material

4. IT

occurs as pits in the metal surface

5. IT

occurs at or near the grain boundaries of the metal.

6. IT

occurs as cracks

7. IT

occurs as the joint action of mechanical stresses and corrosion.

11. Use the definitions to complete the following table. Comment on the items in the table.

FAILURE / FAULT

PROBABLE CAUSES

REMEDY

Pitting corrosion

12. Match the question about corrosion on the left with the answers on the right.

1.

Do we have any problems?

A.

That’s what I’m doing.

2.

I see, now what can be done?

B.

Somewhere, about 1km. from here.

3.

That’s crazy. It’s time to work!

C.

H’m, well I think, maybe, like the Moon surface.

4.

What section is damaged?

D.

How can I do it?

5.

Can you identify the area of corrosion on this section?

E.

Maybe, some corrosion.

6.

If you are so eager, tell me what does it look like?

F.

Had I time, even now.

7.

How long do you think it’ll take to test and measure it?

G.

Let’s paint it.

Now, put the dialogue in the right order and answer the questions.

  1. Where does this conversation take place?

  2. What is the situation?

  3. Who is involved?

13. Read the following text “Cracks” and answer the questions.

1. What types of cracks exist?

2. What factors cause the formation of cracks?

3. What materials are more affected by cracks?

4. What types of cracks are shown on these photos?

5. What caused their formation?

Cracks

Crack characteristics can vary greatly depending on the cause of the crack, the materials being cracked, and the environment causing the cracking. The following photos show examples of crack profiles.

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