Process Diagram

Band 4+: The diagram below shows the process of generating electricity from coal. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

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Image for topic: The diagram below shows the process of generating electricity from coal. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

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The image depicts a coal power plant process flow: (1) coal supply system feeds into (2) pulverizer, then directed to (3) boiler, output goes through (4) dust collection system, after which exhaust is released via a stack; (5) steam drives turbine connected to (6) generator producing electricity, transmitted via (7) substation/transformer; resulting steam is condensed in (8) cooling system, while the ash system (9) directs waste to disposal.

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 how coal is processed to generated electricity.

To start with, coal is transported from minning site and delivered to the processing plant where it is put in a pulverizer for breakdown and removal of dust. The dust is collected by dust collection system the released to the environment through the stack while the ash is also collected and disposed off through the ash system.

once the ash and dust has been removed the remaining product is the transfered to a boiler and its vapourized. This coal in vapour form is used to turn turbines and as a result generate energy that causes the generator to produce electricity. The generated electricity is then supplied to various users from the substation or transformer.

Word Count: 124

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Overall Band Score

4.5

(+/- 0.5)

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

Grammar Mistakes: N/A

Vocabulary Repetition:
No noticeable repetition! Great job!

Task Response

The report covers the main stages of the coal-to-electricity process, but it contains some inaccuracies and omissions. For example, it incorrectly states that dust is released to the environment and that ash is removed before the boiler, whereas the diagram shows dust collection after the boiler and ash as a separate waste stream. The description of steam and the cooling system is missing. The report would benefit from a clearer overview and more precise language, avoiding minor errors like 'minning' and 'vapourized'. Comparisons are not required for this process diagram, but ensuring all key steps are accurately described would improve the response. The report falls short of the required 150 words.

Coherence & Cohesion

The report has a logical structure, but the flow is disrupted by some unclear connections and missing steps. For example, the transition from the pulverizer to the boiler is abrupt, and the role of the cooling system is omitted. To improve, use clearer sequencing words (e.g., 'subsequently', 'following this') and ensure all main stages are linked smoothly. Paragraphing could be better managed to separate the coal processing and electricity generation phases.

Lexical Resource

The vocabulary is adequate but limited and sometimes imprecise. Words like 'minning' (mining), 'vapourized' (vaporized), and 'disposed off' (disposed of) show errors. There is also repetition of basic terms (e.g., 'coal', 'dust'). To improve, use a wider range of technical terms (e.g., 'combustion', 'condensation', 'transmission') and ensure correct spelling and word forms. The phrasing 'breakdown and removal of dust' could be more natural.

Grammatical Range & Accuracy

The report contains several grammatical errors and awkward structures. For instance, 'coal is processed to generated electricity' (should be 'to generate'), 'the released to the environment' (missing 'is'), and 'once the ash and dust has been removed' (subject-verb agreement: 'have been removed'). Punctuation is inconsistent, with missing capital letters (e.g., 'once' at the start of a sentence). To improve, practice using a variety of sentence structures (e.g., passive voice, relative clauses) and proofread for basic errors.

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