Ergonomics: definition, need and benefits

Ergonomics considers both sudden and gradually developing risks. In exams, treat accumulated strain as an important sign.

Price is not proof of ergonomic suitability. In exams, keep user suitability as the main criterion.

Ergonomic success needs body safety along with time saving. In exams, check both a benefit and a new risk.

Body measurements help decide height, reach and space better. In exams, connect body measurements with design.

Ergonomics can also improve organisational quality and productivity. In exams, see individual and organisational benefits together.

Direct answer: Option A is correct. Ergonomics matches a task and workplace to the worker’s body. If shoulders stay raised, the worker is probably compensating for a high work surface, high control or poorly positioned equipment. The first check should therefore be the height and position of the surface or tool; the expert should also observe the task and adjust it safely rather than assume one cause. Option B is irrelevant because a correct name does not explain posture. Option C is irrelevant because floor colour does not normally make shoulders remain raised. Option D is irrelevant because the number of posters does not determine working height. A raised posture can create fatigue and neck or shoulder strain when held for long periods. Memory cue: awkward body posture often points to an awkward workplace height.

Labels help, but errors may have many causes. In exams, look for remaining causes even after one measure.

Long floor work can strain several body parts. In exams, consider household work also as an ergonomic risk.

Priority should be based on risk severity and number of affected people. In exams, choose high-impact improvement.

Fine work requires attention to eyes, hands and posture. In exams, choose combined measures for combined work demands.

When pain or discomfort repeatedly occurs at a particular time and during a specific task step, it can help identify possible causes such as posture, equipment design, work height, or repetitive movement. Therefore, patterned worker feedback is most useful for ergonomic improvement. In option D, there is no clear pattern, so identifying the cause is more difficult. Exam tip: In ergonomics, give priority to clues that connect discomfort with time, task step, and repetition.

Pain increasing at the end of the day can signal time-based fatigue. In exams, connect timing of pain with cause.

The direct answer is A: real movement, posture and obstacles become clear through observation. Ergonomics improves a workplace by studying how the task is actually performed, not by guessing from a desk or a written description alone. Step by step: watch the worker perform the complete task; note reaching, bending, twisting, lifting, repetition and force; identify obstacles, awkward heights and unsafe movements; then choose a suitable change and check whether it helps. Option A is correct because direct observation reveals hidden risks and the difference between the planned task and the real task. Option B is false because observation provides useful evidence. Option C is unfair and false: workers may provide valuable information about discomfort and practical difficulties, even though observation is also needed. Option D is false because guessing can miss important risks. Memory cue: observe first, analyse the work, then improve the workplace.

The work environment affects both body and mind. In exams, do not limit ergonomics only to the body.

Along with correct technique, load amount is also important. In exams, consider both behaviour and work demand.

User participation makes improvement practical. In exams, connect participation with effective ergonomics.

A near miss can be a warning before a future accident. In exams, identify signs before accidents.

Correct ergonomic conditions can improve inspection accuracy. In exams, connect quality with human comfort.

Direct answer: Option A is correct. Anthropometric measurements describe differences in human body size and reach. An average is only a statistical summary; it does not fit every person. A workplace designed only for the average may be too high, too low, too narrow or too far away for people who are smaller or larger than that average. Good design usually allows adjustment or covers a suitable range of users. Option B is wrong because one average design cannot give everyone equal comfort or safety. Option C is wrong because managers are not the only affected group. Option D is wrong because visitors are not the only affected group; workers of many body sizes may be affected. The underlying principle is designing for human diversity, not assuming identical bodies. Memory cue: average is a number, not a person.

The direct answer is option A: noise becomes an ergonomic risk when it disturbs hearing instructions, attention and communication. Ergonomics studies how the workplace, tools and conditions fit human abilities and safety. Step by step, excessive or disturbing noise makes speech harder to hear, reduces concentration, may increase fatigue and can lead to mistakes or missed warnings. Option A is correct because it identifies actual effects on work and safety. Option B is wrong because mild, controlled sound normally does not create this risk. Option C is wrong because clear safety information helps workers rather than harming them. Option D is wrong because noise with no effect is not a demonstrated ergonomic risk. The useful cue is: workplace noise matters when it interferes with people, performance or safety.

Review and improvement cycles are needed to make policy effective. In exams, remember monitoring along with policy.

Adjustability gives comfort to different users at a shared station. In exams, connect shared use with adjustment.

Being nearby is not enough, grip size should also be suitable. In exams, check both tool distance and size.

A document holder can reduce unnecessary neck movement. In exams, pay attention to supporting material position.

Ergonomics should balance comfort and work outcomes. In exams, do not treat one-sided benefit as final.