Band 5.5 IELTS Writing Task 1 Model Answer

Overall Band Score: 5.5 · IELTS Momentum Workout · 2026-11-03

IELTS Writing Task 1 question

The diagram below shows how a mechanical arm works, and how the joints that make up the arm function in the same way as those in a human arm. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

Student answer (Band 5.5)

The diagram demonstrates the working mechanism of mechanical arm. It is manufactured in such a way that it works equivalent to human arm. The computer controls the level of precision at which the motors works.

Overall, it consist of 3 motors which converts electrical energy to mechanical energy. At the end final touch in construction of it is given by painting, drillers to drill holesso it can be secured by screw and lastly, the arm undergoes welding process.

There are 6 main parts which makes the arm working. Starting from bottom it has the base which stationary, but can be occassionally move.Then it consist of the shoulder for upward and downward movement and pivot for rotation of arm.

Furthermore, it has an elbow allowing the arm fexibility and free movement same as human elbow. Apart from that wrist connects elbow to the gripper facilitating it to rotate in all the directions. Lastly, the gripper with built-in sensors that controls force. In addition to that, in some cases wrist is scecured with end effectors. Consequently, the powerhouse of the arm ( motors) are located at the shoulder, elbow and gripper, respectively.

AI examiner evaluation

Task Achievement / Task Response: Band 5.5

You identify several relevant features, including the computer’s control of the motors, the base, pivot, shoulder, elbow, wrist and sensor-equipped gripper. The description of the joints’ functions also makes a useful comparison with a human arm. However, the account is only partly accurate: the paint sprayer, drill and welding are shown as alternative end-effectors, not as finishing stages in the arm’s construction, and the diagram does not say that the motors convert electrical energy into mechanical energy. The overview is also limited; it would be clearer to summarise how the computer-controlled motors move the arm and how interchangeable tools extend its uses. Develop the relationships between components more precisely and avoid adding unsupported explanations.

Coherence and Cohesion: Band 5.5

The response has a recognisable structure: it begins with an introduction, gives a brief overview, and then describes components from the base upwards. Sequencing phrases such as “Starting from bottom,” “Furthermore” and “Lastly” help the reader follow the description. However, progression is weakened by the separate paragraph about painting, drilling and welding, which presents the alternative tools as construction steps and interrupts the explanation of the arm itself. Some links are also awkward or unclear, particularly “In addition to that” and “Consequently,” where the relationship between the ideas is not fully established. Group the arm’s structure and movements together, then describe the alternative end-effectors in a distinct, accurately connected sentence. This would make the organisation more coherent and reduce reliance on formulaic transitions.

Lexical Resource: Band 5.5

You use a relevant range of topic vocabulary, including “pivot,” “gripper,” “built-in sensors,” “flexibility” and “end effectors,” which allows you to identify the main components. Some wording is also appropriately descriptive, such as “facilitating it to rotate.” However, noticeable word-choice, collocation and spelling problems reduce precision: “final touch in construction” misrepresents the tools’ role, “drillers” is not the right term for the pictured drill, and “powerhouse” is an informal, inaccurate label for the motors. There are also misspellings such as “fexibility,” “occassionally” and “scecured.” Choose standard technical terms and check spelling; for example, describe the tools as “alternative end-effectors” rather than construction stages.

Grammatical Range and Accuracy: Band 5.0

You attempt both simple and more developed sentence forms, including clauses explaining function (“the shoulder for upward and downward movement”) and a comparison with the human elbow. However, grammatical errors are frequent and sometimes make relationships difficult to follow. Examples include “It consist of 3 motors,” “motors works,” and “There are 6 main parts which makes,” where subject–verb agreement is incorrect. Articles and sentence construction are also problematic in “mechanical arm” and “the base which stationary,” while “the wrist connects elbow to the gripper” omits necessary articles. Several fragments, such as “Lastly, the gripper with built-in sensors that controls force,” need a complete main clause. Practise accurate agreement, articles and complete sentences, then proofread punctuation and sentence boundaries.

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