28. Укажите, какие предложения соответствуют содержанию текста. Подтвердите свои ответы фактами из текста.

1. Anthracite coals may be divided into lignite and common brown coal.

2. Coals are ranked according to the percentage of carbon they contain.

3. Peat, with the least amount of carbon is the lowest rank, then comes lignite or brown coal.

4. Brown coal is hard and it is not liable to spontaneous combus­ tion.

5. Bituminous coal weathers rapidly and one cannot keep it in open piles.

6. Being intensively used in the Iron and steel industry bitumi­ nous coal varies from medium to high rank.

7. Anthracite or hard coal, the highest in percentage of carbon, can be blended with bituminous grades of coal.

29. Ответьте на следующие вопросы:

1. What is the classification of coal based on?

2. Is carbon the only element in coal? (Prove it.)

3. Is lignite intermediate in properties between peat and bitumi­ nous coal?

4. What heat value does lignite develop when burnt?

5. What coals are liable to spontaneous combustion?

6. What is the difference between lignite and brown coal?

7. Is bituminous coal high- or low-volatile?

154 Unit 6

8. Does anthracite contain 90 per cent of carbon?

8. Where are the largest deposits of anthracite found? And what can you say about bituminous coal?

10. What do you know about the utilization of coal?

30. А) Найдите в правой колоне русские эквиваленты следующих слов и сочетаний слов:

1. spontaneous combustion, а) легковоспламеняющийся газ

2. moisture and ash content 6) высокосортный уголь

3. the most abundant variety в) плавить железную руду of coal г) самовозгорание

4. in its turn д) содержание влаги и золы

5. the amount of volatile matter e) дымное пламя

6. easily inflammable gas. ж) наиболее широко распростра-

7. brilliant lustre ненные угли

8. to smelt iron ore з) яркий блеск

9. high-rank coal и) в свою очередь

10. a smoky flame к) количество летучих веществ

6) Найдите в правой колонке английские эквиваленты следующих слов н сочетаний слов:

1. тип угля a) heat value

2. некоксующийся уголь б) amount of caibon

3. доменная печь в) coal rank

4. содержание углерода г) to store coal

5. смешиваться с другими углями д) to weather rapidly

6. улучшенного качества е) non-coking coal

7. складировать уголь ж) blast furnace

8. теплотворная способность з) of improved quality

9. быстро выветриваться и) to blend with other coals

31. Подберите соответствующие словарные определении дли названий разных видов топлива:

anthracite lignite bituminous coal peat

1. A low-rank brown-to-black coal containing 30 to 40 per cent of moisture. It is liable to spontaneous combustion.

2. A soft brown deposit in which plant structures can easily be seen. It has the least amount of carbon.

3. The main feature of this grade of coals is its low percentage of volatile matter and high caibon content.

4. This coal has more than 14 per cent of volatile content. There are non-coking and coking varieties, the latter being used for coke manufacture.

32. Заполните пропуски в предложениях, используя следующие слова: a) continue continuous continuity

Unit 6 155

1. Fossil fuels ... to play an important role in the national economy of the country.

2. Like other sedimentary strata coal beds are characterized by uniformity and ....

3. In mining bedded deposits ... faces (забои) are used.

6) disturb disturbance disturbed

1. Any change in the normal bedding of a seam (fault or fold) is called a....

2. Coal seams may be structurally ... by faulting or folding.

3. Folds ... coal seams without a break and sometimes faults ... them with a break.