Process Diagram

Band 7+: The following diagrams show a pellet stove and a pellet boiler to work to heat a house. Summarize the information by selecting and reporting the main features, and make comparisons where relevant.

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Image for topic: The following diagrams show a pellet stove and a pellet boiler to work to heat a house. Summarize the information by selecting and reporting the main features, and make comparisons where relevant.

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The image contains two diagrams of heating systems: "Pellet Stove" on the left and "Pellet Boiler" on the right. The Pellet Stove diagram shows a labeled cutaway view with the following components: Exhaust Duct protruding from the rear panel, Wood Pellets being poured into the Fuel Hopper, a Combustion Fan, a Fuel Feed, a Combustion Chamber with flames and hot air, Controls, and an Ash Pan. The Pellet Boiler diagram shows a house cross-section with bedrooms on the top, a living room below, and a furnace system on the bottom right. The system consists of a Smoke Stack on top, hot water pipes leading to radiators in the rooms, a furnace with wood pellets and an ash receptacle, and cold water supply on the bottom.

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 two diagrams illustrate how a pellet stove and a pellet boiler work to heat a house.

Overall, the pellet boiler uses hot water to distribute heat throughout the house by exchanging heat energy with surrounding cold air. On the other hand, the pellet stove uses a combustion air fan to distribute heat energy in the house.

Cold water is pumped through the furnace in the pellet boiler. Wooden pellets are put in the fuel hopper before being passed to the furnace. As they burn, they generate heat that heats cold water in the pipes passing through the furnace. In addition, on the right side of the furnace, there is an ash receptacle When hot water passes through the rooms, it heats surrounding air by heat energy exchange.

In contrast, the pellet stove has a combustion chamber and fan. Similar to the pellet boiler, wooden pellets are loaded into a fuel hopper. From the hopper, the fuel is transferred via a fuel feed mechanism into the combustion chamber, where it is burned. The controls regulate this entire process. Additionally, the ash pan is located under the chamber. Finally, hot air passes through the combustion fan and is blown into the house.

Word Count: 201

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Overall Band Score

7.5

(+/- 0.5)

Vocabulary Complexity:
B2 - Upper Intermediate
Opt for even more advanced words when appropriate.

Grammar Mistakes: N/A

Vocabulary Repetition:

pellet: 7

boiler: 4

water: 4

combustion: 4

through: 4

furnace: 4

stove: 3

energy: 3

hopper: 3

chamber: 3

Try using synonyms for the above words

Task Response

The report provides a clear and organized summary of both heating systems, correctly identifying the main components and processes. It includes an overall statement and makes a comparison between the two systems. However, there are a few minor omissions and inaccuracies: the exhaust duct in the pellet stove is not mentioned, and the description of the pellet boiler's water flow could be more precise (e.g., specifying that hot water is distributed to radiators). Additionally, the report could benefit from a more explicit comparison of the two systems' mechanisms. Overall, the response adequately addresses the task with only minor lapses.

Coherence & Cohesion

The report is well-organized with a clear overall structure, including an introduction, an overview, and separate paragraphs for each system. The use of cohesive devices such as 'Overall', 'On the other hand', 'In contrast', and 'Similar to' helps the reader follow the description smoothly. However, there is a minor lapse in cohesion where the sentence 'In addition, on the right side of the furnace, there is an ash receptacle' is abruptly placed and could be better integrated into the flow. Overall, the message is easy to follow, and paragraphing is managed effectively.

Lexical Resource

The report demonstrates a good range of vocabulary appropriate for the task, including technical terms like 'combustion chamber', 'fuel hopper', 'heat energy exchange', and 'ash receptacle'. The language is generally precise and natural, with some effective use of synonyms (e.g., 'transferred', 'passed', 'blown'). There is room for a bit more sophistication in lexical choice, but the current usage is accurate and clear. Pay attention to vocabulary repetition to improve the overall score.

Grammatical Range & Accuracy

The report shows a wide range of grammatical structures used with good control. Sentences are varied in length and complexity, and the passive voice is used appropriately to describe processes. There are no significant grammar errors, and punctuation is mostly correct. A minor issue is the missing period after 'ash receptacle' in the first paragraph, which is a small lapse in punctuation. Overall, the grammar is accurate and the structures are used flexibly.

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Band 7+: The following diagrams show a pellet stove and a pellet boiler to work to heat a house. Summarize the information by selecting and reporting the main features, and make comparisons where relevant.

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Overall Band Score

Task Response

Coherence & Cohesion

Lexical Resource

Grammatical Range & Accuracy

Answers On The Same Topic:

The following diagrams show a pellet stove and a pellet boiler to work to heat a house. Summarize the information by selecting and reporting the main features, and make comparisons where relevant.

The following diagrams show a pellet stove and a pellet boiler to work to heat a house. Summarize the information by selecting and reporting the main features, and make comparisons where relevant.

The following diagrams show a pellet stove and a pellet boiler to work to heat a house. Summarize the information by selecting and reporting the main features, and make comparisons where relevant.

The following diagrams show a pellet stove and a pellet boiler to work to heat a house. Summarize the information by selecting and reporting the main features, and make comparisons where relevant.

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Check Your Answer On This Topic?

Generate A Band-9 Sample Answer?

Overall Band Score

Task Response

Coherence & Cohesion

Lexical Resource

Grammatical Range & Accuracy

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