Ergonomics: definition, need and benefits

Correct answer: B. Assess sitting posture table height and work duration together

Changing only the chair may not be enough, the whole work setup should be examined. In exams, connect ergonomics with holistic analysis.

Correct answer: C. Use an adjustable work surface or support platform

Adjustability is a better way to handle individual differences. In exams, do not assume one fixed setup is always correct.

Correct answer: C. The ergonomic environment is affecting performance

Poor work environment can reduce even a skilled worker's performance. In exams, link productivity with environment.

Correct answer: A. Keep heavy boxes at a safer lower height

Safe storage of heavy items reduces stretching and fall risk. In exams, consider both load and height.

Correct answer: B. Because screen distance lighting glare and breaks also affect it

Visual ergonomics has many factors working together. In exams, look for combined causes instead of one cause.

Correct answer: B. Pain complaints errors absenteeism and work speed

The direct answer is B: pain complaints, errors, absenteeism, and work speed. An ergonomic intervention changes the fit between people, tools, tasks, and the workplace, so its effect should be judged with measurable health and performance outcomes. Compare records before and after the change: are workers reporting less pain, making fewer errors, being absent less often, and completing work at a suitable speed? Option B contains indicators from both worker health and work results, so it is the strongest group. Option A, wall colour and curtain style, may affect appearance but does not directly measure ergonomic success. Option C, names and office address, identifies people or places but measures no outcome. Option D, chair price and brand, describes purchasing details, not whether the chair improved comfort or performance. A costly branded item may still be poorly adjusted. Memory cue: evaluate ergonomics by effects, not decoration or price.

Correct answer: B. Provide suitable tool grip short breaks and task variation

Improving both repetition and grip is more effective. In exams, choose combined solutions for combined risks.

Correct answer: A. Because ergonomics is linked not only with accidents but also fatigue and efficiency

Ergonomics considers fatigue and performance along with injury. In exams, understand its benefits broadly.

Correct answer: B. Poor arrangement of use sequence and reach zone

The direct answer is B: poor arrangement of the use sequence and reach zone. In ergonomics, objects should be placed according to the order and frequency of use, with commonly used items within a comfortable reach area. If tools are arranged opposite to their sequence, students repeatedly cross their hands and make unnecessary movements. This can increase time, awkward posture, fatigue, and the chance of dropping or mishandling an item. Option A is wrong because colour does not explain the crossing movement. Option B is correct because it identifies both problems: wrong sequence and poor reach arrangement. Option C is irrelevant; interest is not the workplace-design problem described. Option D is irrelevant because the class name has no effect on tool access. A better layout places the first-used tool first and frequently used tools close to the user. Exam cue: repeated stretching, crossing, or searching usually signals a layout problem.

Correct answer: A. Study of human ability limitation and work environment relationship

Human factors help make work suitable for people. In exams, remember both human ability and limitation.

Correct answer: B. When heavy items are always stored above head level

The direct answer is B: heavy objects are always stored above head level. Training can teach a worker a safer lifting method, but it cannot by itself remove a dangerous storage design. A heavy item above the head may require reaching, stretching, awkward posture, and lifting from an unstable position; it can also fall onto the worker. The solution should include redesigning the storage area, moving heavy items to waist-to-chest height, and then reinforcing safe handling through training. Option A may often be improved mainly by teaching the correct lifting method, so training could address it, although equipment and load assessment may also matter. Option B is correct because the physical arrangement itself must change. Option C is wrong because being new does not automatically create an ergonomic hazard; orientation may help. Option D is wrong because simple work can still be designed safely and does not explain the specific danger. Memory cue: training changes behaviour; redesign changes the hazard.

Correct answer: C. Checking height lighting and tool suitability before work starts

The direct answer is C: checking height, lighting and tool suitability before work begins is ergonomics as primary prevention. Ergonomics means fitting the job, equipment and workplace to people so that work can be done safely, comfortably and effectively. Primary prevention acts before an injury or illness occurs. Step by step: identify possible risks in advance; assess posture, reach, force, lighting and tool design; adjust the workstation; then monitor whether the arrangement works. Option C is correct because it prevents harm at the source before pain or injury develops. Option A is wrong because giving medicine after injury is treatment, not primary prevention. Option B is wrong because replacing a worker after pain increases responds late and may not remove the workplace hazard. Option D is wrong because hiding and failing to report a problem allows the risk to continue. Good prevention protects workers and improves work quality. Memory cue: primary prevention means “change the risk before the injury.”

Correct answer: A. Tool size and grip may be unsuitable for the task

Tool grip and size change the force effect on the hand. In exams, connect tool design with physical strain.

Correct answer: A. Are work environment lighting layout and fatigue increasing mistakes

Mistakes may be due to the system, not only the person. In exams, link errors with work system.

Correct answer: A. Because the employee has less fatigue and better attention

Ergonomics improves work by fitting the workplace, tools, and tasks to the needs of the worker. A comfortable posture, suitable equipment, and a well-arranged work area can reduce unnecessary physical effort and tiredness. When workers are less fatigued, they are generally able to concentrate better, make fewer avoidable mistakes, and perform tasks more accurately. This can improve the quality of the final work.

Option A is correct because lower fatigue supports better attention and accuracy. Options B and C are wrong: ergonomics does not stop work checking or remove safety rules. Option D is also wrong because keeping tools far away can increase effort and waste time. Ergonomics improves quality through comfort, safety, efficiency, and focused performance.

Correct answer: B. Proper height surface rest breaks and safe floor

The direct answer is B: use a correctly adjusted work surface, rest breaks and a safe floor. Ergonomics means designing work, tools and surroundings to suit the worker’s body and reduce strain. For standing work, examine several causes: an unsuitable height may bend or stretch the back; standing continuously prevents recovery; and a hard or unsafe floor increases leg fatigue or slipping risk. B addresses all three. A is wrong because a hard floor and no breaks increase discomfort. C is wrong because longer work adds strain rather than preventing it. D is wrong because heavy tools increase the physical load. The correct plan may also include supportive footwear or changing posture, but B is the only suitable listed combination. Memory cue: safe height, safe surface and short recovery breaks protect standing workers.

Correct answer: A. Because it can also result from light direction reflection and screen position

Glare arises from many visual factors and strains the eyes. In exams, look at quality of lighting.

Correct answer: A. Because correct use training is also needed with equipment

Direct answer: A, because correct-use training is needed along with the equipment. An adjustable chair can support different body sizes only when the user knows how to set its height, back support, and other features. Without training, the chair may remain at an unsuitable setting, so the intended ergonomic benefit is not achieved. A is therefore correct because design and informed use must work together. B is wrong: adjustable chairs are not always bad; their value depends on quality and use. C is wrong because colour has little bearing on posture or adjustment. D is wrong because seated work is possible and common when properly arranged. Training should explain adjustment, posture, and warning signs. Memory cue: good design plus correct use equals real ergonomic benefit.

Correct answer: A. Accumulated fatigue and work errors

Balanced breaks reactivate both body and attention. In exams, do not treat breaks as avoiding work.

Correct answer: A. Keeping materials in use sequence and within hand reach

Use sequence and reach together save time and energy. In exams, connect work simplification with ergonomic arrangement.

Correct answer: A. When better layout also reduces time errors and cost

Ergonomics affects efficiency and cost along with health. In exams, identify multiple benefits.

Correct answer: A. Because posture and force needs change according to task nature

Fine and heavy tasks may need different body positions. In exams, connect task nature with height.

Correct answer: A. Keeping main items in direct view and comfortable reach

If the main screen is not in front, unnecessary strain falls on the neck. In exams, link viewing direction with posture.

Correct answer: A. Health discomfort and injury risk reduced

Reduced physical problems can support regular attendance. In exams, connect absenteeism with health factors.

Correct answer: A. Because pain fatigue and near misses are also risk signs

The direct answer is A: pain, fatigue and near misses are also warning signs of risk. Ergonomic assessment should be preventive, so it must look beyond accidents that have already caused injury. Observe the task, ask workers about discomfort, check repeated mistakes and record events that almost caused harm. The reasoning is: a hazard may first produce strain or a near miss; if ignored, it may later produce an accident. Option A is correct because these early signals can reveal risk before serious harm. Option B is wrong because reports do not always concern decoration; it is irrelevant to hazard identification. Option C is wrong because accidents are important evidence, even though they are not the only evidence. Option D is wrong because workers often know practical problems that an outside observer may miss, so asking them is useful, not wrong. Memory cue: report accidents, but also listen to early warnings.