MCQ For Day 1

Ergonomics is the application of scientific information concerning the relationship between human beings and the design of objects, systems, and environments. It involves studying how humans interact with their surroundings and using that knowledge to improve the design of things like furniture, tools, and workspaces to enhance comfort, efficiency, and safety. Option D accurately defines ergonomics by highlighting the application of scientific information to improve the relationship between humans and their designed environment.

When designing the controls of a car, it is important to consider psychological factors, physiological factors, and anthropometric factors. Psychological factors refer to how the controls affect the driver's mental state and cognitive processes. Physiological factors involve how the controls interact with the driver's physical abilities and limitations. Anthropometric factors consider the driver's body size, proportions, and range of motion. All three factors are crucial in ensuring that the controls are intuitive, comfortable, and safe for the driver to use.

Ergonomics is the correct answer because it refers to the application of scientific knowledge about human abilities and limitations to the design of tools, machines, tasks, and the overall work environment. It aims to improve working conditions by optimizing the interaction between people and their work environment, ultimately increasing efficiency and preventing injuries or discomfort. Percentile range, anthropometrics, and bodily tolerances do not accurately describe the concept of applying scientific information to improve working conditions and efficiency.

Fatigue is a physiological factor that affects ergonomics. When a person is fatigued, their physical and mental abilities are compromised, leading to decreased productivity, increased risk of errors, and decreased overall performance. Fatigue can also lead to muscle strain, discomfort, and increased risk of accidents or injuries. Therefore, managing and minimizing fatigue is essential in creating an ergonomic work environment that promotes safety, productivity, and well-being.

The groundskeeper is at risk of pesticide exposure because they are responsible for maintaining the grounds, which often involves using pesticides to control pests and weeds. Pesticides contain chemicals that can be harmful to human health, and if not used properly or with proper protective measures, the groundskeeper can be exposed to these chemicals, leading to potential health risks.

If a worker is exposed to pesticides, it is important for them to get first aid treatment immediately. Pesticides can be toxic and harmful to human health, so prompt medical attention is necessary to prevent any potential adverse effects. This may include rinsing off the affected area, removing contaminated clothing, and seeking medical assistance to assess and treat any symptoms or complications that may arise from the exposure.

Upgrading a computer by replacing the central processing unit with a more powerful one is considered reconditioning because it involves improving or restoring the computer's functionality and performance. Reconditioning typically involves replacing or repairing components to make the device more efficient or capable. In this case, by replacing the central processing unit with a more powerful one, the computer's processing power is enhanced, resulting in improved performance. Therefore, the correct answer is D. Reconditioning.

One can be exposed to pesticides through ingestion, inhalation, and contact with the skin, eyes, and mucous membranes. Ingestion occurs when pesticides are accidentally consumed through contaminated food or water. Inhalation happens when pesticides are inhaled as vapors or dust particles in the air. Contact with the skin, eyes, and mucous membranes occurs when pesticides come into direct contact with these areas of the body. Therefore, all of these routes of exposure can lead to pesticide exposure.

In designing a seat for a mass-produced car, the percentile range of 5th-95th would be used. This means that the seat is designed to accommodate 90% of the population, from the 5th percentile (smaller individuals) to the 95th percentile (larger individuals). By designing the seat to fit a wide range of body sizes, it ensures that the majority of people will be comfortable and properly supported while sitting in the car.

Manufacturers have the most control over the planned obsolescence of a product. Planned obsolescence refers to the practice of intentionally designing and producing products with a limited lifespan or functionality, encouraging consumers to replace them more frequently. This strategy allows manufacturers to generate more sales and profits. Legislators may have some influence through regulations and laws, but ultimately it is the manufacturers who make decisions about the design, production, and lifespan of their products. Consumers have limited control as they can choose to buy or not buy a product, but they do not have control over the planned obsolescence itself. Designers play a role in implementing planned obsolescence, but the ultimate decision lies with the manufacturers.

The use of solar power to replace batteries as the energy source for torches is an example of life cycle analysis. Life cycle analysis involves evaluating the environmental impact of a product throughout its entire life cycle, from production to disposal. By using solar power instead of batteries, the torches have a reduced environmental impact as they do not contribute to battery waste. This decision aligns with the principles of life cycle analysis, which aims to minimize the overall environmental impact of a product.

A designer would most likely use the 95th percentile value when designing the length of a bed. The 95th percentile represents the value below which 95% of the data falls. By using this percentile value, the designer ensures that the bed will accommodate the majority of individuals' lengths, allowing for a comfortable sleeping experience for most people.

The engine size of the car is not an ergonomic consideration in the design of a car. Ergonomics focuses on designing products and environments that are safe, comfortable, and efficient for human use. The internal air conditioning system, adjustability of the steering wheel, and seat dimensions all directly impact the comfort and usability of the car for the driver and passengers. However, the engine size does not have a direct impact on the ergonomics of the car, as it primarily affects the performance and power of the vehicle.

The design consideration that does not apply to motorcycle helmets is "Suitable for 50th percentile." This means that the helmet does not need to be specifically designed to fit individuals who fall within the 50th percentile in terms of head size or shape. The other options, such as range of sizes, adjustability, and safety, are all important design considerations for motorcycle helmets.

The 99th percentile would most likely be used to decide the minimum height for the ceiling of a room because it represents the height that only 1% of adults would exceed. By setting the ceiling height at the 99th percentile, it ensures that the vast majority of adults will have enough headroom in the room.

Anthropometrics refers to the measurement and collection of data concerning the different sizes of men, women, and children. It involves studying and analyzing the physical dimensions and proportions of the human body to understand variations in size and shape among different populations. This data is used in various fields such as ergonomics, product design, architecture, and healthcare to ensure that objects, systems, and environments are designed to accommodate and fit the human body properly.

This answer suggests that the ease of pairing is low and the frequency of replacement is high. This means that it is difficult to find compatible pairs and that replacements need to be made frequently.

The correct method of disposing of pesticides is none of the above options. Burying the chemicals in the ground can lead to contamination of soil and groundwater. Pouring the chemicals in the sink can contaminate the water supply. Flushing the chemicals down the toilet can also contaminate the water supply and harm aquatic life. Proper disposal methods for pesticides include taking them to a hazardous waste facility or participating in a local pesticide collection program.

Mixing pesticides in an enclosed area can actually increase the risk of pesticide exposure and harm to humans and the environment. Pesticides should be mixed in well-ventilated areas or outdoors to minimize the concentration of toxic fumes. This allows for better dispersion of the chemicals and reduces the chances of inhalation or contact with the pesticides.

An ergonome is not a scaled 3D model. An ergonome refers to the study of designing products or systems that are compatible with the abilities and limitations of people. It involves considering factors such as anthropometry, biomechanics, and cognitive abilities. An ergonome can be based on a specific percentile range to accommodate a diverse range of users. It is used to establish spatial considerations between people and products, ensuring that they can interact comfortably and efficiently. However, it is not a physical model itself, let alone a scaled 3D model.