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

Date: 2015-10-07; view: 423.

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

Ask your scientific supervisor to explain what can happen to these engineering materials.

For example:

· copper / to be alloyed with iron

A: Can copper be alloyed with iron?

B: Certainly it can. Copper can be alloyed with iron.

or I'm afraid it can't. Copper can't be alloyed with iron.

1. a ductile metal / to be worked into a new shape

2. copper / to be used as a conductor of electricity

3. tin / to be alloyed with copper

4. brass / to be used in bearings and gears

5. copper / to be recycled several times

For 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.

For 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.