- •Vocabulary
- •Give English equivalents.
- •2. Ask questions according to the models.
- •3. Supply prepositions.
- •4. Complete the sentences. Choose the right word from the list. There are more words than necessary!
- •5. Answer the questions.
- •6. TranslateintoEnglish.
- •7. Write a dictation.
- •Vocabulary
- •1. Choose the proper verb form.
- •2. Answer the questions.
- •Vocabulary
- •1. GiveEnglishequivalents:
- •2. Complete the sentences:
- •3. Give English equivalents to the words in brackets:
- •4.Self-assessment questions:
- •5. Translate into English:
- •1. Translate the word combinations into Russian and use them in your own sentences.
- •2. Choose the proper verb form, active or passive.
- •Vocabulary
- •1. TranslateintoEnglish.
- •2. Supply the proper preposition.
- •Vocabulary
- •Give English equivalents:
- •Answer the questions according to the models:
- •Match the type of the boiler with its principle of classification:
- •Self-assessment questions:
- •5.Translate into English:
- •1. Find the corresponding English translation in the text and memorize the words.
- •2. Put questions to the sentences.
- •Vocabulary
- •1. Give answers to the questions:
- •2. Translate into English:
- •Vocabulary
- •1.Give English equivalents:
- •2. Ask questions according to the model:
- •3. Complete the sentences:
- •4. Answer the questions:
- •5. Translate into English.
- •2. Translate the word combinations and use them in your own sentences.
- •Vocabulary
- •1. Supply prepositions.
- •2. Answer the questions.
- •Vocabulary
- •1. GiveEnglishequivalents:
- •2.Change these sentences using the modal verbs may, can, must:
- •3. Change these sentences into the passive:
- •4. Supply prepositions:
- •5. Answer the questions:
- •6. TranslateintoEnglish:
- •2. Complete the sentences.
- •Vocabulary
- •1. Change these sentences using the modal verbs may, can, must:
- •2. Change these sentences into the passive:
- •Vocabulary
- •1. Give English equivalents.
- •2. Supply prepositions.
- •3.Self-assessment questions.
- •4. Translate the words into Russian.
- •5. Choose the proper verb and put it into the correct form. There are more verbs than necessary.
- •6. Translate into English:
- •Unit VI. The superheater
- •Vocabulary
- •1. GiveEnglishequivalents:
- •Saturation, inlet, tubes, outlet, drums, safety valve, uptake, headers
- •3. Answer the questions:
- •Vocabulary
- •1. GiveEnglishequivalents:
- •2. Insert prepositions and conjunctions:
- •3. Answer the questions:
- •4. Translate the phrases containing comparatives and superlatives:
- •5. Translate into English:
- •1. Find English equivalents in the text.
- •2. Write down all the imperative phrases typical for this instruction.
- •3. Put questions to the sentences.
- •Vocabulary
- •1. Combine these pairs of sentences by using “if”.
- •2. TranslateintoEnglish.
- •Irregularities in operation, causes and remedies
- •Vocabulary
- •1. Replace the imperative sentences (remedy) by the following structures:
- •2. Translate these phrases into Russian:
Vocabulary
feed water питательнаявода
evaporate, v испаряться
impurity, n примесь; загрязнение
remain, v оставаться
saltdeposits отложения солей
scale накипь
foaming вспенивание
priming вскипание
softsludge мягкий шлак; шлам
brittlescale хрупкая, ломкая накипь
harmful, adj вредный
blowingdown нижнее продувание
alkali, n щелочь
organicmatter органическое вещество
solution, n раствор
excessalkalinity избыточная щелочность
injurious, adj вредный
adhere, v прилипать; приставать
rupture, n разрыв
rating, n мощность
load, n нагрузка
blowoff верхнее продувание
freshwater свежая; пресная вода
dissolve, v растворять
contaminant, n загрязняющее вещество; примесь
deaerator, n деаэратор
acid, n кислота
sodium chloride хлориднатрия
E X E R C I S E S
1. GiveEnglishequivalents:
Питательная вода; подавать; питательный насос; содержать примеси; приводить к проблемам; коррозия; образовывать; кальций; магний; сульфат магния; мягкая масса; предотвращать образование накипи; наличие; вызывать перегрев; мера; избегать; чрезмерные нагрузки; углекислый газ; карбонат натрия, проводить химический анализ.
2.Change these sentences using the modal verbs may, can, must:
Model. Priming is due to high ratings. Priming may be due to high ratings. |
Foaming is due to the presence of dirty water in the boiler.
Oil in the feed water is very injurious to the boiler.
Priming is also due to a poorly designed steam drum.
Acids are neutralized by the addition of sodium carbonate.
A little of the chemicals is added at a time.
3. Change these sentences into the passive:
Model. Chemicals remove scale from the boiler. Scale from the boiler is removed by chemicals. |
The addition of alkalis prevents scale formation.
The presence of oils in solution causes foaming.
Some of the salts produce a soft sludge.
The chlorides of sodium and magnesium and the sulphate of iron cause corrosion.
We may neutralize acids by the addition of sodium carbonate.
4. Supply prepositions:
1. Feed water is the water supplied … a boiler … the feed pump.
2. The impurities … the boiler remain … the form of the salt deposits.
3. Alkalis or phosphate are put … marine boilers to prevent scale.
4. Oil is very injurious … a boiler as it adheres … the tube surfaces.
5. Priming may be due … improper construction of boiler.
6. To prevent priming it is necessary to maintain the water … the lowest level.
7. Corrosion results … the dissolved gases found … feed water.
8. Acids may be neutralized … the addition of sodium carbonate.