Band 5.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 5.0 · IELTS Momentum Workout · 2026-09-21

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 5.0)

THE GIVEN DIAGRAM ILLUSTRATES THE MECHANICAL ARM WORKS AND HOW A WORK ARM PERFORM FUNCTION SAME AS HUMAN ARM DO.

IN GENERAL, IT SEEMS THAT PROCESSING OF MECHANICAL ARM IS QUITE INTERESTING PROCESS, WHICH HAVE SEVERAL STAGES, WHILE OMITTING ANY STEP, THE ENTIRE PROCESS CAN BE AFFECTED.

TO START PROCEDURE, FIRSTLY COMPUTER PLAY A CRUCIAL ROLE FOR CONTROLLING THE MOTOR MACHINES AS THREE MOTORS ARE ESSENCIAL FOR CONTROLLING THE WORK OF ARM FUNCTION WHICH ARE OPERATED BY COMPUTER , FIRST MOTOR IS CONNECTED WITH THE BASE SHOULDER TO MAKE IT MOVEABLE IN THE UP AND DOWN DIRECTION AND PIVOT ENABLES ARM TO ROTATE. SECOND MOTOR HAS ITS OWN IMPORTANCE IN WHICH IT REQUIRED TO CONTROL THE FUNCTIONALITY OF ELBOW WHICH ALLOWS THE STATIONARY MACHINES MOVEMENT AND MAKE IT MORE FLEXIBLE.

SUBSEQUENTLY, THIRD MOTOR HAS ITS OWN SIGNIFICANT FUNCTION AS IT CONNECTED WITH THE GRIPPED PORTION OF THE MACHINE WHICH IS RESPONSIBLE FOR CONTROLLING FORCE AND IT IS THE MAIN PART OF THE MACHINE WHICH IS SENSOR BASED EQUIPMENT. IN ADDITION, IT MAY BE THE ALTERNATIVE END OF THE OTHER EFFECTORS SUCH AS SPRAY PAINT OR DRILL HOLES.

AI examiner evaluation

Task Achievement / Task Response — Band 5.0

The student addresses the task by describing how the mechanical arm works and comparing its joints to those of a human arm. However, the response falls into several inaccuracies regarding the prompt. For instance, the text states that 'three motors are essencial for controlling the work of arm function which are operated by computer', but the diagram shows three motors linked to specific functions (elbow, wrist/gripper, and gripper force), while the base and shoulder are distinct components. The overview is overly simplistic, and the writing is written entirely in capital letters, which is inappropriate for an Academic task. While key features such as the computer control and alternative end-effectors are mentioned, the lack of precision and awkward phrasing limit the score to a Band 5.0.

Coherence and Cohesion — Band 5.0

The text is organized into paragraphs, including an introduction and body paragraphs introduced by transition markers such as 'TO START PROCEDURE, FIRSTLY' and 'SUBSEQUENTLY'. However, paragraphing is not used appropriately, and the entire response is written in uppercase letters. Cohesive devices are often misused or mechanically applied, such as 'while omitting any step, the entire process can be affected', which disrupts the logical flow. Referencing is sometimes unclear, and the overall progression lacks the sophisticated structuring expected at higher bands. This warrants a Band 5.0 for coherence and cohesion.

Lexical Resource — Band 5.0

The student attempts some less common vocabulary related to the diagram, such as 'precision', 'functionality', 'stationary', and 'alternative end-effectors'. However, there are numerous lexical and spelling errors throughout the text, including 'ESSENCIAL' (essential), 'MOVEABLE' (movable), 'GRIPPED' (gripping), and awkward collocations like 'work arm perform function same as human arm do'. The range of vocabulary is limited and repetitive, with frequent word-choice errors that occasionally strain the reader. This performance aligns closely with the Band 5.0 descriptors for lexical resource.

Grammatical Range and Accuracy — Band 4.5

The student attempts complex sentence structures, but these attempts are frequently faulty and accompanied by a high density of grammatical errors. Examples include missing articles ('computer play a crucial role'), incorrect verb forms ('is required to control'), and run-on sentences joined by commas instead of proper conjunctions or full stops ('SECOND MOTOR HAS ITS OWN IMPORTANCE IN WHICH IT REQUIRED TO CONTROL THE FUNCTIONALITY OF ELBOW WHICH ALLOWS THE STATIONARY MACHINES MOVEMENT AND MAKE IT MORE FLEXIBLE'). The range of structures is limited, and frequent errors cause difficulty for the reader, supporting a Band 4.5 score.

See this exact question answered at other band scores — the same prompt compared across bands.

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