Ergonomics: definition, need and benefits

The direct answer is B: move the heavy object near the worker and place it at a safe height. Ergonomics seeks safe efficiency, not speed at the cost of injury. Step by step, pulling a heavy object from far away makes the arms reach, increases bending and creates greater force on the back and shoulders. Bringing it close shortens the reach; a safe height reduces deep bending or overhead lifting; together these reduce strain. A is wrong because continuing the unsafe method preserves the risk. C is wrong because less light makes visibility and safety worse. D is wrong because removing breaks increases fatigue and injury risk. Saving a few seconds is not worthwhile if it causes harm. Exam cue: first reduce distance, excessive reach and awkward height; then consider speed.

Pain in several body parts may show a problem in the whole arrangement. Exam tip: understand the workstation as a system.

Documents in front and at proper height reduce neck turning. Exam tip: link material position with posture.

If task demand exceeds human ability, body strain increases. Exam tip: remember demand-capacity balance.

Eye problems can relate to lighting and screen. Exam tip: identify visual ergonomics separately.

Placing items by frequency of use saves effort and time. Exam tip: remember frequency and reach together.

Reaching a far control stretches the body and may cause mistakes. Exam tip: link control placement with safety.

Clear pathways reduce accidents and proper height reduces body strain. Exam tip: identify multiple benefits.

Keeping materials in front reduces twisting and body strain. Exam tip: treat repeated twisting as a risk.

Adjustable arrangement is useful for different heights and needs. Exam tip: remember user variability.

If a work surface is too low, a worker may need to bend repeatedly; if it is too high, the worker may need to raise the shoulders. These awkward postures increase strain on the neck, shoulders, and back, so option A is a clear sign of incorrect work height. Options B, C, and D indicate an appropriate work height and better ergonomics. Exam tip: In work-height questions, repeated bending, shoulder elevation, and uncomfortable reaching are warning signs.

Increasing mistakes may indicate that the workstation height, tool reach, posture, or fatigue from repetitive work is unsuitable. Checking these ergonomic factors can reduce discomfort, fatigue, and errors. Looking only at work speed or production targets is insufficient because the root cause may lie in the work arrangement. Exam tip: Treat errors, fatigue, and discomfort as indicators that ergonomic improvement may be needed.

Jerking a heavy object while it is held away from the body places sudden extra stress on the back and increases the risk of injury. Thus, it wrongly values finishing quickly over safe working practice. In contrast, lifting a load in a controlled way close to the body is safer. Exam tip: look for options involving jerking, an unbalanced load, or an unsafe posture.

The direct answer is A: excessive heat can reduce attention and comfort. Ergonomics includes environmental conditions, not only chair shape or tool design. A very hot workplace makes the body work harder to control its temperature. Step by step: heat increases discomfort and fatigue; fatigue can reduce concentration and reaction speed; reduced attention can lower work quality and increase mistakes or accident risk. The exact effect depends on temperature, humidity, clothing, workload, ventilation, hydration and the individual, but reduced comfort and attention are clear possible outcomes. Option A is correct because it describes a realistic effect of thermal stress on human performance. Option B is wrong because room colour does not explain the main ergonomic effect of heat. Option C is wrong because heat does not make tools physically lighter. Option D is wrong because heat cannot cause files to be found automatically and is unrelated to that claim. Memory cue: environmental ergonomics includes heat, light, noise and air movement; connect heat with fatigue and attention.

Repeated slipping indicates that the tool handle or grip design is not suitable for the hand, friction, or control required for the task. A well-designed grip improves control and reduces risks such as dropping the tool, cuts, and fatigue. Rest breaks may reduce fatigue, but they do not directly correct a slipping grip. Exam tip: Link questions about grips, handles, and control with tool design and safety.

The direct answer is A: an item may be organised but still be an ergonomic risk if it is heavy and placed very high. Organisation means that things have a planned location; it does not automatically mean that the location is safe or easy to use. Step by step: consider the object’s weight; consider its height and the worker’s reach; consider the lifting posture and force needed; then judge whether the task creates strain, dropping risk or overreaching. Option A is correct because a heavy object above shoulder level may require stretching, awkward posture or unsafe lifting, even if it is neatly stored. Option B is wrong because a nearby, light item is generally less risky, although the whole task should still be checked. Option C is wrong because a clean, dry floor reduces slipping risk but does not answer the heavy-high storage problem. Option D is wrong because balanced lighting is helpful but does not remove the risk caused by weight and height. Memory cue: organised is not automatically ergonomic; check reach, weight, posture and force.

Even with correct posture, long continuous work can cause fatigue. Exam tip: check duration along with posture.

Reduced injuries and better work affect both cost and quality. Exam tip: link ergonomic benefits with both worker and employer.

Eye and neck problems can relate to both screen and lighting. Exam tip: remember combined correction.

A handle of proper length reduces bending and back strain. Exam tip: link tool length with body posture.

Tripping may be caused by obstacles or slipperiness in pathways. Exam tip: include pathway in safety.

Small wrong posture or distance can create large strain over time. Exam tip: remember cumulative effect.

Ergonomics accepts different needs of different people. Exam tip: be careful with one-size-fits-all.

Ergonomics reduces this imbalance and makes work safer. Exam tip: understand ergonomics as a subject of balance.

If the problem is reach, the item should first be placed in the reach zone. Exam tip: remember cause-specific correction.