Process Diagram

Band 7+: the diagram shows how coal is used to generate electricity

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The image depicts the process of generating electricity from coal: coal moves into pulveriser, then to furnace producing heat, heat converts water into steam which powers turbine, turbine rotation drives generator producing electricity, steam passes through cooler, produced electricity is transferred via transformer to power lines.

Given the complexity of the image, the above description may not be entirely accurate.

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Note: Both the topic and the answer were created by one of our users.

The diagram above illustrates the process of using coal to generate thermal power.

Overall, there are seven steps through which this electricity is generated, starting from the pulverisation of coal, and ending the electricity travelling to power lines to be used.

The first step is to transfer the coal from where it is stored into a pulverising machine through a conveyor belt. The crushed up coal is now sent into the furnace, where it is subjected to combustion. The heat produced by this boils the water that is present in the pipes in this chamber, and converts it into high pressure and high temperature steam. This steam is directed towards a turbine, which makes it rotate. Meanwhile the water is cooled in the cooler to be reused. The spinning turbine is connected to an electric generator, which uses the mechanical energy of the turbine and converts it into electrical energy. After this, the energy is sent to a transformer to step up the voltage. Electricity is now finally sent to power lines.

Word Count: 172

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Overall Band Score

7.5

(+/- 0.5)

Vocabulary Complexity:
C1 - Intricate
Strive to incorporate even richer and more precise language.

Grammar Mistakes: N/A

Vocabulary Repetition:

which: 3

electricity: 3

turbine: 3

energy: 3

Try using synonyms for the above words

Task Response

The report comprehensively and accurately describes the process of electricity generation from coal, covering all key stages from coal pulverization to electricity transmission. The description is clear, well-organized, and easy to follow, demonstrating a strong understanding of the process. The language used is precise and appropriate for the task.

Coherence & Cohesion

The report presents a clear and logical description of the coal-to-electricity process. The steps are presented in a sequential manner, making it easy to follow. The use of 'Overall' to introduce the summary is effective. Transitions like 'The first step is' and 'After this' help guide the reader through the process. To improve coherence, consider adding more specific linking words or phrases to connect ideas within paragraphs and between them. For example, you could use phrases like 'As a result,' 'Subsequently,' or 'In addition to' to enhance the flow of information.

Lexical Resource

The report demonstrates a good range of vocabulary related to the process of electricity generation. Terms like 'pulverisation,' 'combustion,' 'turbine,' 'generator,' and 'transformer' are used appropriately. To further enhance the lexical resource, consider incorporating more specific or technical vocabulary related to each stage of the process. For example, instead of 'pipes in this chamber,' you could use a more precise term like 'boiler tubes.' Also, try to vary your word choice to avoid repetition; for instance, instead of repeatedly using 'sent,' you could use synonyms like 'directed,' 'transmitted,' or 'conveyed.'

Grammatical Range & Accuracy

The report demonstrates a good command of grammar with a variety of sentence structures. There are only a few minor errors. To further improve grammatical accuracy, pay close attention to subject-verb agreement and article usage. For example, double-check sentences like 'The crushed up coal is now sent into the furnace' to ensure grammatical correctness. Also, review the use of prepositions to ensure they are used accurately and appropriately.

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