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V. Your partner is an Instructor in the lab. Ask him if you may perform the following actions. Work in pairs.

EXAMPLE: to use these substances for the experiment

A: May I use these substances for the experiment?

B: Yes, you may. You may use these substances for the experiment.

to elaborate the plan of the research

to experiment with alloying elements

to carry out different operations on milling machines

to demonstrate the properties of tool steels

to observe the steel making process

VI. Your friend wanted to do a lot of things in the practical class yester­day. Ask him if he was allowed to do all of them.

EXAMPLE: to demonstrate the new applications of steels

A: Were you allowed to demonstrate the new appli­cations of steels?

B: No, I wasn't. But I will be allowed to do it tomor­row.

to work in the rolling mill

to test the performance characteristics of alloy steels

to use a new milling machine

to study the structure of stainless steels

to observe how steel is cast

VII. Discuss with your friend which of these things may be done.

EXAMPLE: machine tools / to be made of pig iron

A: May machine tools be made of pig iron?

B: Gertainly they may. They may be made of pig Iron.

or B: I'm afraid they may not. They may not be made of pig iron.

a) pure iron / to be refined

b) the properties of iron / to be modified easily

c) the carbon content of steel / to be varied

d) hydrogen / to be added to alloy steel

e) steel / to be tempered

f) steel alloys / to be protected from corrosion

g) steel / to be used for electrical wiring

h) machine tools / to be made of pure iron

VIII. Insert the necessary prepositions.

1. I'm going to study the properties … some materials.

2. Julia is interested … elasticity.

3. Steel tools have grown … popularity.

4. The student plans to carry … his research on materials engineer­ing.

5. We use metals … different engineering purposes.

6. Steal may be pressed … a new shape.

IX. Correct mistakes in the following sentences.

1. Metals which are used in industry may to be called engineering metals.

2. He wasn't allowed determine the constituents of this steel.

3. The majority of metals may to become harder after they have been cold-worked.

4. You doesn't may carry out the investigation here.

5. The students be allowed to practise in the rolling mill yesterday.

6. Will be I allowed to use the mobile equipment?

X. Translate the sentences into English using your active vocabulary.

1. Тепер ви можете досліджувати властивості легованих сталей.

2. Вчора нам дозволили спостерігати, як очищають залізо.

3. Скажіть, будь-ласка, які властивості має вуглецева сталь і чому вона використовується найбільш широко?

4. Можу я спитати: чому ця сталь не буде іржавіти?

5. Високоміцні сталеві сплави можуть включати різноманітні елементи.

6. Вуглецева сталь не може використовуватися для виготовлення шасі літаків.

Reading and Speaking

I. Practise reading these words.

ancient

purify

superior

percentage

malleable

ingot

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