Band 6.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 6.0 · IELTS Momentum Workout · 2026-10-15

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 6.0)

The diagram represents the working of a mechanical arm as well as the similarity of joints in the arm with the functioning of human arm.

In brief, the motors present in the arm are controlled by a computer, which is later used in various locations of the arm for different purposes, to enable the mechanical arm function in a similar way a a human arm. It also represents the alternative end-effectors of mechanical arm including spray paints, drill holes and weld metals.

Firstly, a conputer is required for precisely controlling the motors of the arm, which are divided into three types based on their usage. The first motor is used in gripper, that has a built-in sensors to control force. The gripper is then connected to elbow through wrist, which allows gripper or alternative end-effector to flex or rotate when required. The end-effectors, other than gripper can be a spray paint, a drill holes or a weld metal.

The elbow consist of the second motor to help in movement or gives flexibility, juct like a human elbow works. The last motor is present in the shoulder, which similar to human shoulder, raises and lowers the arm. It also consist of a pivot alongside shoulder to enable arm to rotate. The end or base is usually stationary or occasionally movable.

AI examiner evaluation

Task Achievement / Task Response: Band 6.5

You cover the main components and give a useful overview of computer-controlled motors, the arm’s joints, and alternative end-effectors. Several functions are accurately reported, including the shoulder raising and lowering the arm, the pivot enabling rotation, and the gripper’s force sensors. This meets the task well, with some detail beyond a basic description. However, the account of the motor connections is partly inaccurate: the diagram links the left motor to the elbow, the centre motor to the arm near the wrist, and the right motor to the gripper, rather than assigning the first motor to the gripper and the last to the shoulder. The human-arm comparison is also mentioned but not consistently developed. Clarifying these relationships would make the report more precise and complete.

Coherence and Cohesion: Band 6.0

The response has a clear overall structure: an introduction and overview are followed by descriptions of the upper arm, joints, and base. Sequencing words such as “In brief,” “Firstly,” and “The last motor” help guide the reader, and the main points are generally easy to follow. However, the progression is not always smooth. The paragraph beginning “Firstly” moves from the computer to the gripper, wrist, and alternative tools, then the next paragraph returns to the elbow and shoulder. This order makes the arm’s physical layout harder to picture. Some references, such as “It also represents,” are not fully clear. Organising the details from the base upwards, and using clearer links between each joint and its motor, would improve cohesion.

Lexical Resource: Band 6.0

You use a suitable range of task-related vocabulary, including “built-in sensors,” “end-effectors,” “flexibility,” “pivot,” and “stationary.” These terms help convey the diagram’s technical features, and the meaning is generally understandable. There are, however, some inaccurate word choices, collocations, and spelling errors. For example, “spray paints, drill holes and weld metals” does not naturally describe the alternative tools; “spray painting, drilling and welding” would be more appropriate. “Divided into three types” also suggests categories, whereas the diagram shows three motors with different connections. Spelling slips such as “conputer” and “juct” reduce accuracy. Aim for precise descriptions of the components and their functions, and check spelling and word forms during revision.

Grammatical Range and Accuracy: Band 6.0

You use a mix of simple and more complex sentence forms, including relative clauses such as “which allows gripper or alternative end-effector to flex or rotate” and “that has a built-in sensors.” The overall meaning remains clear, but some grammatical errors occur in agreement, articles, and sentence construction. For instance, “The elbow consist” and “It also consist” need a singular verb, while “a built-in sensors” combines a singular article with a plural noun. The phrase “which similar to human shoulder” is missing a verb, and “a a human arm” contains a repeated article. These errors do not usually prevent understanding, but they limit accuracy. Review subject–verb agreement and article use, and proofread each sentence for missing or repeated words.

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