«Утвержден» Научно-методический совет Джизпи за№ от 2021 г. Председатель совета

4. Circle the correct item.

1. 
   Good morning. How can / must I help you?
   
2. 
   Frank may / must be late this evening.
   
3. 
   I’m sorry. You can’t / couldn’t park here.
   
4. 
   Could / Must I sit here, please?
   
5. 
   May Must I borrow your pen, please?
   
6. 
   I must can’t go to the hospital I feel ill.
   

5. Underline the correct word.

Kate is able to use the computer.

You are forbidden to eat or drink in class.

You are obliged to tidy your room at the weekend.

It’s a good idea to eat a lot of vegetables

There’s a possibility it will snow tonight.

Kate can use the computer

You _________________________

You _________________________

You_________________________

It ___________________________

5.9 Text: Engineering materials technology

Grammar: Conditional verbs

Tasks

1. Read the text, try to focus on its essential facts and choose the most suitable heading given below for each paragraph.
1) Different Kinds of Joining Processes

2) Turning Process

3) Different Kinds of Cutting Processes

4) Milling Process

5) Grinding Machine

6) Different Kinds of Chip Producing Processes

CUTTING AND JOINING PROCESSES

Besides forming processes, metalworking includes cutting and joining processes. Cutting is considered to be a collection of processes wherein material is brought to a specified geometry by removing excess material. In cutting metals the excess metal is chips or swarf. Cutting is nearly fully represented by machining, burning, and some special processes. Machining is most commonly known to be a chip producing process. Burning is a process during which metal parts are cut into pieces. Using an oxy-fuel cutting torch to separate a plate of steel into smaller pieces is an example of burning. Chemical milling is an example of a special process that removes excess material by the use if etching and masking chemicals. In metalworking a lot of chip prodeching technological processes are a vailable, such as turning, boring, miling, drilling, grinding, etc. Turning is a cutting process for producing a cylindrical surface.It can be done on a lathe, which frequently requires continuous supervision by the operator, or by using modern computer numerical control (CNC) lathes. When turning, a piece of material (wood,metal, plastics,or stone ) rotates and a cutting tool (usually single-point) is traversed along two axes of motion to produce precise diameters and lengths. Turning can be either on the outside of the cylinder or on the inside (also known as boring) to produce tubular components of various sizes.

Milling is a comparatively complex process of removing material to form the final part. It is generally done on a milling machine, which includes a milling cutter (usually multipoint) that rotates about its axis, and a worktable that can move in multiple directions. Milling machines can perform a vast number of complex operations, such as slot cutting, planning, drilling, threading,rabbeting,etc.There are two common types of mlling machines: the horizontal stones or inorganic materials.

Finished parts that meet specifications are assembled into different kinds of machines. For this purpose, temporary and permanent joining techniques exist. Mechanical fastening, sometimes called temporary mechanical joining, includes joining processes which use bolts, screws, studs, etc. Permanent joining processes embrace welding, brazing,soldering, and riveting.

2. Match the adjectives in column A with the nouns in column B to form meaningful phrases and then identify them at the sentence level in the text. It will help you understand the text in detail.

A B

1)abrasive a) surface

2)common b) joining

3)horizontal c) control

4)modern d) supervision

5)tubular e) wheel

6)various f) examples

7)permanent g) mills

8)numerical h) computers

9)cylindrical i) sizes

10)continuous j) components

3. Decide which of the verbs on the left collocate with the words or phrases on the right and then identify the word combinations at the sentence level in