Process Diagram

Band 4+: The diagram below shows how a central heating system in a house works. Summarise the information by selecting and reporting the main features, and make comparisons where relevant. Write at least 150 words.

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Image for topic: The diagram below shows how a central heating system in a house works. Summarise the information by selecting and reporting the main features, and make comparisons where relevant. Write at least 150 words.

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The image shows a diagram of a domestic hot water system with the following labeled components: Water tank to fill storage tank, Cold water into house, Overflow pipe, Storage tank, Hot water to taps, Boiler (gas or oil), Pump, Hot water radiators, Small tubes, Cold water. There are no numerical data points or percentages provided in the image.

Given the complexity of the image, the above description may not be entirely accurate.

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The digrame shows how central heating system wroks inside a household.

Oveall there is two main process going on in the system, one crarrying the cold water supply abd anotherone producing the hot water.

The proccess starts when water leaves the storagetank and flowing straight from the pipe to boiler, which contains either gas or oil whithin. After when it locaates in boiler it moves flows to the pump, leading it to the first hot water radiator which heats up water.Through out it”s way it will flow pass 3 more of this hot water radiators till it finishes its first stage.

The second tage is a way back of already heated water to taps . Through small tubes it lifts itself to anothher pipe and brunning pass 4 previous water radiators.Then it reaches boiler, whiout entering the pump , and running fto storage tank. From there it doesnt go bak to previous tank , but rather flows up from upper pipe and moving straight yo its final destination, the taps , which are now filled with heated water.

Word Count: 178

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Overall Band Score

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Vocabulary Complexity:
B1 - Intermediate
Using more sophisticated words could be beneficial.

Grammar Mistakes: N/A

Vocabulary Repetition:

water: 7

boiler: 3

which: 3

Try using synonyms for the above words

Task Response

The report attempts to describe the central heating system but contains several inaccuracies and omissions. It misidentifies the flow of water, incorrectly states that water flows from the storage tank to the boiler before reaching the radiators, and omits key components such as the cold water inlet, overflow pipe, and the distinction between the cold water tank and the storage tank. The description of the second stage is confusing and contains errors (e.g., water passing through radiators again, reaching boiler without pump). The report also lacks a clear overview of the two main circuits (heating and hot water). To improve, focus on accurately describing the main stages, include all key components, and ensure the sequence of water flow is logical and clear.

Coherence & Cohesion

The report attempts to describe the process but lacks clear organization and logical flow. The description jumps between stages without clear sequencing, and the use of cohesive devices is limited and sometimes inaccurate. Paragraphing is not effectively managed, and the overall message is difficult to follow due to abrupt transitions and unclear references. To improve, structure the report with clear paragraphs for each stage of the process, use a range of linking words (e.g., 'first', 'then', 'after that', 'finally') to guide the reader, and ensure each sentence logically connects to the next.

Lexical Resource

The vocabulary used is basic and repetitive, with several spelling errors (e.g., 'digrame', 'wroks', 'Oveall', 'crarrying', 'whithin', 'locaates', 'brunning', 'fto', 'bak') that hinder clarity. There is limited use of precise technical terms, and some word choices are inappropriate (e.g., 'lifts itself', 'running fto'). To improve, expand your range of vocabulary related to processes and systems, use accurate technical terms (e.g., 'flows', 'circulates', 'transfers'), and proofread to eliminate spelling errors. Aim for more precise and varied language to describe the sequence of actions. Boost vocabulary complexity to elevate the overall score.

Grammatical Range & Accuracy

The report contains numerous grammatical errors, including incorrect verb forms (e.g., 'is two main process', 'it moves flows'), missing articles, and punctuation issues (e.g., 'it's way' should be 'its way'). Sentence structures are often incomplete or run-on, and there is limited variety in grammatical constructions. To improve, focus on using correct verb tenses (present simple for describing processes), ensure subject-verb agreement, and use a mix of simple and complex sentences. Practice writing clear, accurate sentences and review basic grammar rules such as articles, prepositions, and punctuation.

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