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Process Diagram

Band 9: the diagram shows how coal is used to generate electricity

Image for topic: the diagram shows how coal is used to generate electricity
Our system will evaluate the answer based on this AI-generated description.
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 illustrates the process involved in the production of electricity from coal.

Overall, the whole process consists of a series of stages, beginning with the raw coal being conveyed to a crusher and ending with the generation and transmission of electricity.

First, the stored coal is allowed to pass through a conveyor to reach the pulveriser, where it is ground to powder. Next, this crushed coal is burnt in a furnace to heat the water running through a water system. Burnt gases leave the furnace via the chimney, while steam from hot water is used to energise the turbine. After that, water is cooled again in a cooler before returning to the furnace, repeating the process. Once the turbine is powered, its energy is used to run the generator, which produces electricity. In the next stage, electric power is transferred to the transformer, which ultimately transmits this electricity to the power lines.

Word Count: 153

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Overall Band Score

9
(+/- 0.5)
Vocabulary Complexity:
C1 - Intricate
Strive to incorporate even richer and more precise language.
Grammar Mistakes: N/A
Vocabulary Repetition:
water: 4
process: 3
electricity: 3
furnace: 3
Try using synonyms for the above words

Task Response

9
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. There are no significant omissions or inaccuracies.

Coherence & Cohesion

9
The report presents a clear and logical description of the coal-to-electricity process. The stages are well-sequenced, and the use of cohesive devices (e.g., 'First,' 'Next,' 'After that,' 'Once') enhances the flow of information. Paragraphing is effective in organizing the information.

Lexical Resource

9
The report demonstrates a wide range of vocabulary related to the process, such as 'pulveriser,' 'furnace,' 'turbine,' 'generator,' and 'transformer.' The language is used accurately and appropriately, indicating a sophisticated control of lexical features.

Grammatical Range & Accuracy

9
The report exhibits a wide range of grammatical structures with full flexibility and control. The absence of grammatical errors and phrasing issues indicates a high level of accuracy and proficiency.

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the diagram shows how coal is used to generate electricity

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Band 4+

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Band 4+

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Band 7+

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