Process Diagram

Band 8+: The diagram below shows how one type of coal is used to produce electricity.

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Image for topic: The diagram below shows how one type of coal is used to produce electricity.

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The image depicts the process of making electricity from coal, starting with a mine where coal is extracted, followed by a crusher that breaks the coal into smaller pieces, then transportation of coal to a gasifier. The gasifier converts coal into gas, which goes through a cooler before reaching the gas power plant. The gas power plant generates electricity that is distributed to houses and industries, while also producing heat waste. Solid waste is shown as a byproduct of the cooler.

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 process provides information about how a specific kind of coal is utilized in generating electricity. Looking at the diagram as a whole, it is evident that there are total 8 steps, commencing with collecting coal from mine and finalizing with the distribution of electricity to buildings.

Initially, coal is extracted from mines and subsequently crushed into smaller particles using a specialized device. These crushed coal pellets are then transferred to a gasifier, where they undergo heating and transformation into gas. Upon cooling, the gas is partly utilized as waste heat, while the remainder is processed through a cleaning mechanism.

The purified gas is then directed to a gas power plant, where it serves as input for a gas power plant. During this process, excess heat is released as waste. Finally, the generated electricity is transmitted via power lines to meet the energy demands of businesses and residences, thus completing the cycle.

Word Count: 152

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Overall Band Score

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Vocabulary Complexity:
C2 - Complex
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Grammar Mistakes: N/A

Vocabulary Repetition:

electricity: 3

power: 3

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Task Response

The report provides a detailed overview of the process of generating electricity from coal as shown in the diagram. The key stages are accurately described, and the overall process is well-understood. However, there are minor inaccuracies and omissions in the report, such as not mentioning the cooler in the gasification process and missing details about the solid waste byproduct. Overall, the response addresses the task effectively with only a few rare lapses.

Coherence & Cohesion

The report is well-organized and coherent, with a clear introduction, body paragraphs describing each stage of the process, and a conclusion. The progression of ideas is logical, and there is a good use of cohesive devices to connect the information. Paragraphing is effectively managed, contributing to the overall coherence of the response. Minor improvements could be made in linking some stages more explicitly for enhanced cohesion.

Lexical Resource

The report demonstrates a wide range of vocabulary related to the process of generating electricity from coal. There is a precise and accurate use of technical terms such as 'gasifier,' 'pellets,' and 'waste heat,' enhancing the lexical resource. Additionally, the language used is formal and appropriate for the task, with complex structures employed effectively. To enhance lexical resource further, more varied synonyms and terminology could be incorporated.

Grammatical Range & Accuracy

A wide range of grammatical structures is used throughout the report, showcasing flexibility and control. The sentences are mostly accurate, with minor errors in punctuation and word choice. Complex structures are employed effectively to describe the process in detail. To improve grammatical range and accuracy, attention to subject-verb agreement and article usage could be beneficial.

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