- •Unit 1 Topic: The usa Grammar: Revision of Tenses. Present Forms
- •1. Make nouns from the following verbs:
- •8. Use the verbs in brackets in the correct tense-form.
- •9. Put all possible questions to the sentences.
- •10. Translate into English.
- •1. Are the following statements about the text true or false? Why?
- •2. Answer the following questions.
- •3. Speak on the topic “The usa”.
- •Materials Technology
- •1. Combine the following words to receive word-combinations:
- •7. Comment on the use of the Past Progressive in the following sentences:
- •8. Comment on the use of the Past Perfect in the following sentences:
- •9. Comment on the use of the Past Perfect Progressive
- •10. Use the verbs in brackets in the correct tense-form:
- •1. Are the following statements about the text true or false? Why?
- •Metal Processing
- •1. Find pairs of synonyms.
- •2. Answer the following questions.
- •Factors Affecting Machinability
- •1. Are the following statements about the text true or false? Why?
- •Welding
- •1. Comment on the meaning of the following word groups:
- •6. Find the gerunds. Comment on their syntactic function.
- •9. Put all possible questions to the sentences.
- •10. Translate into English.
- •1. Are the following statements about the text true or false? Why?
- •2. Answer the following questions.
- •Welding Processes
- •1. Make nouns from the verbs:
- •2. Combine the following words to receive proper terms:
- •4. Replace the underlined words with antonyms where it is necessary:
- •5. Put the verbs in brackets in the necessary tense:
- •6. State the type of the subordinate clause.
- •7. Insert what, that or which.
- •8. Choose the conjunction which fits the meaning of the sentence. In some cases more than one will fit.
- •9. Put the verbs in brackets in the necessary tense:
- •10. Translate into English.
- •11. Read the text. Retell it in the past/future tense.
- •1. Are the following statements about the text true or false? Why?
- •2. Decode the following abbreviations:
- •Welding equipment
- •1. Are the following statements about the text true or false? Why?
- •Structure of Welding Faculty
- •Department of welding technology
- •Department of electric welding installations
- •Department of machinery parts restoration
- •1. Are the following statements about the text true or false? Why?
- •VI. Read the paragraph. What is success?
- •Do you think it’s important to be lucky to achieve success in life? Share your opinion concerning the quotations in italics. How to be Successful
- •Have you bought any of the books mentioned in the paragraph?
- •Do you agree with setting achievable realistic goals to use them as stairs to the target one?
- •Does being an optimist help you in being successful in life?
- •The Disadvantages of Success
- •On the scale from 1 to 10 how are material goods important in life for you?
- •II. Try to guess if the following statements are True or False:
- •I. Who do the characters from “Friends” look like:
- •II. Fill in the blanks with the names of the characters who said the following:
- •III. Find the pictures Ross, Rachel, Monica and Phoebe can be associated with basing on the information you’ve learnt from the movie:
- •IV. Answer the following questions:
- •V. Arrange the following events in the chronological order:
- •Vocabulary
- •I. Read the following examples from the movie and try to explain why this particular time form is used in each one:
- •II. Make up sentences in Future simple or using “to be going to” basing on the following pictures:
- •III. Fill in the blanks with the appropriate word:
- •V. Match the words from the first column with their antonyms in the second column:
- •V. Match the synonyms:
2. Answer the following questions.
What is a foundry?
What is a casting?
Is the shape of the casting determined by the shape of the mold cavity?
What is the oldest known metalworking process?
Why does forging improve the mechanical properties of metal?
What is the basis for all forging operations?
When was cutting found?
What categories can machine-tools be divided into?
What machines accomplish machining of large-volume production parts best?
3. Speak on the topic “Metal Processing”.
4. Communicative situations:
You have visited a foundry. Tell about processes you’ve watched there.
Make a report on topic “Machine-tools”.
Unit 4
Topic: Factors Affecting Machinability
Grammar: The Complex Sentence. The Subordinate Clauses
Vocabulary
Learn the following words and word combinations:
edge life [eG laif] – ресурс стійкості
behaviour [bi'heivjq] – поведінка; режим (роботи)
skin [skin] – зовнішній шар, оболонка; обшивка
allowance [q'lauqn(t)s] – допуск
slag [slxg] – шлак
scab [skxb] – дефект відливку
rigidity [ri'Gidqti] – жорсткість, твердість
abrasion [q'breiZ(q)n] –шліфування; стирання, зношування
nodular ['nOdjulq] –вузлуватий
flake graphite [fleik 'grxfait] – пластинчастий графіт
phosphide ['fOsfaid] – фосфід
embed [im'bed] – вставляти, вміщувати
matrix ['meitriks] –матриця, форма
Reading
Read and translate the text.
Factors Affecting Machinability
Machinability is generally assumed to be a function of tool edge life. The main factors which influence the behaviour, and thus the life of the edge of a cutting tool, are:
the mechanical characteristics of the material being machined, such as its strength, hardness and metallurgical structure;
the state of the casting, involving the skin finish, critical dimensions, machining allowances, slag inclusions, the presence of scabs, rust, dirt, etc.;
the nature of the machining techniques being used;
the characteristics of the machine-tool being used, such as machine efficiency, available power, and the rigidity of the setup.
Other factors aside, it is primarily the structure of the metal which determines its resistance to the cutting action of the tool, i.e. the potential rate of metal removal, and the resulting abrasion on the tool, i.e. the life of the cutting edge.
Structure, strength and machinability are interrelated to some extent – in general, increased strength implies reduced machinability. This basic relationship must be understood, otherwise difficulties may be experienced in the machine shop if the designer has specified a material with a higher strength than is necessary. Nevertheless, care should be taken in rating machinability on the basis of strength. For example, nodular irons are normally considerably stronger than flake-graphite types, but are likely to be easier to machine. It is therefore recommended that structure, rather than strength, be adopted as the basis for machining practice.
Hardness provides a more reliable guide to machinability than does strength, for hardness depends mainly on the matrix structure of the casting/ again, however, the relation is of a general nature only, for it is possible to have a metal which exhibits a low hardness value, but which has a very abrasive action on the cutting tool. For example, the presence of hard phosphide particles embedded in a soft, ferritic matrix reduces tool life considerably.
Language study
Discussion