Ergonomics: definition, need and benefits

Correct answer: B. Wrist strain

A bent wrist can face continuous pressure. Exam tip: remember straight wrist position in typing.

Correct answer: C. Safe and clear space

Removing unnecessary items keeps pathways clear and safe. Exam tip: link clear space with accident prevention.

Correct answer: D. Safety and efficiency

Direct answer: D, safety and efficiency. Ergonomics arranges tools, furniture, posture and work methods so that the task fits the person. A good arrangement reduces unnecessary force, awkward movement, fatigue and mistakes. As a result, the person can work more safely and often complete the task more efficiently. Option A is wrong because correct ergonomics should reduce, not increase, fatigue and risk. Option B is wrong because disorder and pain are problems that ergonomic planning tries to prevent. Option C is wrong because ergonomics aims to improve security and reduce errors, not increase insecurity and mistakes. Option D is correct because it expresses the two major benefits together: protection from harm and better use of time and effort. Reasoning chain: suitable design leads to comfortable movement; comfortable movement lowers strain; lower strain supports safer and more efficient work. Memory cue: good ergonomics gives “less strain, more safety, better work.”

Correct answer: A. To reduce bending and pain

Correct sitting and height reduce body strain. Exam tip: remember ergonomics in household tasks.

Correct answer: A. To reduce hand and shoulder stretching

Keeping a computer mouse close to the body allows the arm to remain near a comfortable position instead of being stretched forward or sideways. This can reduce unnecessary reaching and may lower strain on the shoulder, upper arm, wrist, and hand during repeated work. The exact position should still allow the elbow and wrist to remain relaxed.

Option A is correct because a suitable reach reduces hand and shoulder stretching. Hiding the mouse, switching off the screen, and increasing sound have no connection with its ergonomic placement. Ergonomics does not mean placing every tool at any distance; it means arranging tools and posture to support safety, comfort, efficiency, and reduced fatigue.

Correct answer: A. Human-friendly workplace

A human-friendly workplace considers both health and comfort. Exam tip: treat human comfort as the base of ergonomics.

Correct answer: A. Productivity may improve

Healthy and comfortable employees can work better. Exam tip: remember productivity as an employer benefit.

Correct answer: C. Because injury and fatigue reduce

When injury and fatigue reduce, employees can remain regular. Exam tip: link health benefits with attendance.

Correct answer: D. Body strain reduces

Keeping weight close to the body improves balance. Exam tip: remember correct method while lifting heavy objects.

Correct answer: A. Comfort

Proper air and temperature increase comfort during work. Exam tip: link environmental comfort with ergonomics.

Correct answer: B. Shoulder strain

The direct answer is B: shoulder strain. Ergonomics studies how body movement and workplace design affect comfort and safety. When a worker repeatedly raises the arms above a comfortable level, the shoulder muscles must work again and again. Holding the arms up or reaching too high can cause muscle fatigue, pain, stiffness, and strain in the shoulders and nearby upper back. Option B is correct because the repeated movement directly loads the shoulder area. Option A is wrong because repeated overhead movement does not provide waist comfort; it may even cause other discomfort. Option C is wrong because eye comfort is mainly related to lighting, screens, and visual breaks, not arm height. Option D is wrong because foot safety is not the main body area affected by raising the arms. Remember: repeated overhead reaching points first to shoulder strain.

Correct answer: C. Height and ability are different

Every person's physical need may be different. Exam tip: connect individual differences with ergonomics.

Correct answer: D. To increase discomfort

Ergonomics applies knowledge about people, tools, furniture, and work conditions so that tasks can be performed safely, comfortably, and efficiently. Good ergonomic design aims to reduce unnecessary strain, awkward posture, fatigue, and the risk of work-related discomfort. It is therefore intended to improve the fit between a person and the work environment.

Option D is correct because increasing discomfort is the opposite of the purpose of ergonomics. Improving safety, reducing fatigue, and increasing comfort are all genuine ergonomic aims. A correct arrangement may involve suitable chair height, proper screen position, and reachable equipment, but it should not create extra strain merely to follow a rule mechanically.

Correct answer: A. Time saving

The direct answer is A, Time saving. Organised papers and files have a known place, a clear label, or a logical order. The reasoning is: when a document is filed properly, a worker can locate it quickly; less searching means less wasted time; the saved time can be used for the actual task. Organisation can also reduce stress and support accurate work. Option A is correct because orderly files make retrieval faster. Option B, increase in mistakes, is generally the opposite of the likely benefit; clear organisation can help reduce confusion and errors, although it cannot guarantee that no mistake will occur. Option C, work becoming difficult, is wrong because easy access usually makes work simpler. Option D, increasing confusion, is also wrong because confusion is more likely when papers are scattered or unlabeled. A good system should be maintained consistently so everyone can use it. Memory cue: a place for every file means less searching and more working.

Correct answer: A. Muscle pain

Wrong posture can increase pressure on muscles. Exam tip: remember the link between posture and muscle pain.

Correct answer: A. Person and work

The direct answer is A: ergonomics improves the fit between a person and the work. Ergonomics is the study of designing work, tools, furniture and surroundings so that they suit human body abilities and needs. The reasoning is simple: a person performs a task; if the task, tool or workplace matches the person properly, comfort, safety and efficiency improve. If the match is poor, strain, tiredness and mistakes may increase. Option A is correct because it states the basic idea of ergonomics. Option B, song and colour, is unrelated to the design of work and human use. Option C, weather and food, concerns another relationship and does not define ergonomics. Option D, name and address, is about personal identification, not work design. Memory cue: “Ergo” means work, so ergonomics means making work fit the person.

Correct answer: A. Hand and back strain

Pulling far objects increases body stretch. Exam tip: remember keeping items at proper distance.

Correct answer: A. Clear, level and free from obstructions

In an ergonomic workplace, pathways should be clear, level and free from obstructions so that people can move safely and the risk of trips, slips and falls is reduced. Loose wires, stored items and wet surfaces make pathways unsafe. Exam tip: remember that clear pathways are a basic workplace accident-prevention measure.

Correct answer: A. Task rotation

Task rotation reduces continuous pressure on the same muscle. Exam tip: remember task change in repetitive work.

Correct answer: A. Work becomes more comfortable

Comfortable and safe work can increase satisfaction. Exam tip: remember the relation between comfort and satisfaction.

Correct answer: B. Back

Lifting a heavy object incorrectly can place excessive force on the muscles, joints, and supporting tissues of the body. The back is especially vulnerable when a person bends from the waist, keeps the load far from the body, twists suddenly, or tries to lift more than they can manage. Safe lifting usually involves assessing the load, keeping it close, bending the knees, maintaining a stable posture, and raising it with the legs rather than pulling mainly with the back. Assistance or equipment should be used when necessary.

Option B is correct because incorrect lifting can strain the back and lower-back region. The word “can” is important: injury is a possible risk, not an unavoidable result every time. Options A, C, and D are not the main body areas normally stressed by lifting a heavy object in this situation. Thus, the question tests awareness of safe handling and the need to protect the back through suitable lifting technique.

Correct answer: C. Accident risk

The direct answer is C: accident risk can increase. Workplace disorder means tools, boxes or materials may be left in unsafe places. Step by step, a person may fail to see an obstacle, trip over it, collide with something, use the wrong tool or make a mistake while searching. Therefore an untidy workplace can increase the chance of injury and accidents. Option A, comfort, is wrong because disorder usually makes movement and work less comfortable. Option B, safety, is wrong because clutter generally reduces safety rather than increasing it. Option C is correct because obstacles and confusion directly raise accident risk. Option D, efficiency, is wrong because time is lost while finding or moving items, so efficiency often falls. A clean, planned arrangement makes hazards easier to notice and work easier to perform. Memory cue: “Clutter creates danger; clear space creates safety.”

Correct answer: D. No in both home and workplace

Ergonomics is useful at home, office, and other workplaces. Exam tip: treat it as a topic with wide use.

Correct answer: A. Ergonomic arrangement

These three make work safe and convenient. Exam tip: remember height, lighting, and reach together.

Correct answer: A. Healthy, safe and efficient work

Ergonomics promotes health, safety, and efficiency. Exam tip: remember these three as final benefits.