Process Diagram

Band 7+: You should spend about 20 minutes on this task. The diagram below shows how one type of coal is used to produce electricity. Summarise the information by selecting and reporting the main features, and make comparisons where relevant. You should write at least 150 words.

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Image for topic: You should spend about 20 minutes on this task. The diagram below shows how one type of coal is used to produce electricity. Summarise the information by selecting and reporting the main features, and make comparisons where relevant. You should write at least 150 words.

Our system will evaluate the answer based on this AI-generated description.

The image illustrates the process of producing electricity from coal, starting from a mine where coal is extracted and moved to a crusher. Post-crushing, the coal undergoes a cooling process generating gas and waste heat. The gas is then cleaned and directed to a gas power plant that produces electricity. During this process, additional waste heat is generated. The gas also flows into a gasifier, which contributes heat back into the system.

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 illustrates the process of producing electricity from a type of fossil fuel, particularly coal.

Overall, the linear process consists of several stages, beginning with coal to gas and ending with electricity. The raw materials are transported to different factories.

Looking first at the stages of transforming coal into gas, coal is exploited from a mine and it is then crushed into small pieces. These crushed materials are transported to a gassifier by trucks, where they are heated, transforming into gas.

This gas is processed in another factory, where it is cooled. This cooling process emits waste heat, which is not used in the next stages. For the cooled gas, it is moved to to another plant to be cleaned before entering a gas power plant, in which it is converted into electricity and produces waste heat in the process. The electricity is distributed to households or to power manufacturers.

Word Count: 151

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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:

process: 4

electricity: 4

stages: 3

Try using synonyms for the above words

Task Response

The report provides a clear overview and covers the main stages of the process. However, there are some inaccuracies and omissions: the cooling process is described as occurring after crushing, but the visual description indicates that cooling generates gas and waste heat, and the gas is then cleaned. Also, the role of the gasifier in contributing heat back into the system is not mentioned. The report could be improved by more accurately describing the sequence and including all key components, such as the gasifier's heat feedback. Additionally, there are minor grammatical errors (e.g., 'gassifier' instead of 'gasifier', 'moved to to another plant') that could be revised for clarity.

Coherence & Cohesion

The report is well-organized with a clear overall structure, including an introduction, overview, and body paragraphs. The use of cohesive devices is generally effective, and the progression of stages is logical. However, there are minor lapses in cohesion, such as the phrase 'For the cooled gas, it is moved to to another plant' which could be smoother. Overall, the message is easy to follow, and paragraphing is managed well.

Lexical Resource

The report uses a good range of vocabulary appropriate for the task, such as 'exploited', 'crushed', 'transformed', and 'distributed'. There is some repetition (e.g., 'gas' and 'plant'), and a few imprecise terms like 'gassifier' instead of 'gasifier'. The lexical resource is adequate but could be more varied and precise to achieve a higher band.

Grammatical Range & Accuracy

The report demonstrates a good range of grammatical structures with mostly accurate use. There are minor errors, such as 'it is then crushed' (should be 'it is then crushed' is fine, but 'it is moved to to another plant' has a typo), and a slight awkwardness in 'For the cooled gas, it is moved'. Overall, grammar and punctuation are used correctly, and the errors do not impede understanding.

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