Ergonomics: definition, need and benefits

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.

Excess heat can increase fatigue and reduce attention. Exam tip: link temperature with work ability.

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.

Even if organised, height and weight can create risk. Exam tip: check more than one factor.

Reaching a far mouse stretches the hand and shoulder. Exam tip: check reach of each tool separately.

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.

Keeping instructions near eye level reduces neck bending. Exam tip: instruction display is also an ergonomic factor.

In a poor ergonomic arrangement, risk factors such as awkward posture, forceful effort, and repetitive movements continue day after day. This repeatedly places small stresses on muscles, joints, and nerves, so minor injuries or pain may recur. Options B and C describe good ergonomic practices that reduce such risk. Exam tip: link recurring minor injuries with repetition, awkward posture, and insufficient rest.

Reaching a far pedal can disturb leg and body posture. Exam tip: check distance of controls.