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 illustrates the phases involved in the production of electricity through coal at a thermal power plant.

Overall, the generation of electricity from coal is a linear process, with the fossil raw material passing through several steps to transfer it’s energy into steam and ultimately being sent out to the city in the form of electrical energy.

Initially, coal is filtered and pulverised in to fine particles. These grounded coal is introduced in to a furnace where it is used to reach burning temperatures of around 1500 fahrenheit, where water is flowing through pipes. The heat generated from the burning coal is used to transform water in to steam. Moving forward, the steam passes through a cooler.

The steam is then targeted and directed to the turbine blades which rotate it at high speeds thereby converting heat energy to electrical energy in the generator. Finally, this direct electrical current is stored in transformers from where it is transmitted to the city through power lines and made available for consumption.

Word Count: 170

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Overall Band Score

7.5

(+/- 0.5)

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

Vocabulary Repetition:

through: 5

steam: 4

energy: 3

electrical: 3

where: 3

Try using synonyms for the above words

Task Response

The report provides a clear and logical overview of the process, successfully identifying the main stages from coal preparation to electricity distribution. The overview is well-constructed, and the sequence of events is easy to follow. To improve, ensure more precise technical accuracy; for instance, the report suggests steam passes through a cooler before the turbine, whereas the visual description implies the cooler follows the turbine. Additionally, be careful with minor grammatical errors such as 'it's' (possessive should be 'its') and subject-verb agreement ('These grounded coal is').

Coherence & Cohesion

The report is well-organized and follows a logical progression that mirrors the stages of the process. The use of cohesive devices such as 'Initially', 'Moving forward', and 'Finally' helps the reader navigate the sequence easily. To reach a higher band, ensure that transitions between sentences feel even more seamless and less formulaic.

Lexical Resource

The vocabulary used is appropriate and varied, with good use of process-related terms like 'pulverised', 'grounded', and 'transmitted'. There is a good attempt at paraphrasing the prompt. To improve, pay attention to minor spelling/usage errors (e.g., 'in to' vs 'into') and ensure that technical terms are used with absolute precision.

Grammatical Range & Accuracy

The report demonstrates a good range of complex structures, particularly in the use of relative clauses and passive voice, which is essential for process descriptions. However, there are some grammatical inaccuracies, such as the misuse of the possessive 'it's' instead of 'its', and subject-verb agreement issues (e.g., 'These grounded coal is'). Refining these minor errors will significantly improve the overall accuracy.

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