HLPaper 1
When designing a manual pedal-powered irrigation pump, which physiological factor is primarily monitored to assess the aerobic energy expenditure of the user during operation?
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When designing a manual pedal-powered irrigation pump, which physiological factor is primarily monitored to assess the aerobic energy expenditure of the user during operation?
Professional landscape gardeners often use cordless electric hedge trimmers for extended periods. These tools must be designed to accommodate the physiological limits of the human body to ensure both efficiency and user well-being.
Figure 1: A professional cordless hedge trimmer
two factors that influence an individual's physical work capacity when operating heavy outdoor power tools.
why the grip diameter of the trimmer's handle is a critical physiological factor in the tool's design.
two ways that environmental stressors can impact the physiological performance of the operator.
Greenfeet publishes a sustainability progress report every year which summarizes the total environmental impact of the products it produces, see Figure 1.
Figure 1: Greenfeet Sustainability Progress Report 2019
| Area of Impact | % |
|---|---|
| CO2 footprint | 39% |
| Land use | 4% |
| Pollution (air) | 28% |
| Pollution (water) | 6% |
| Water consumption | 23% |
Value Chain
In 2018, Greenfeet introduced the Vertue shoe, featuring an upper made entirely from ocean-recovered plastic. By 2019, the company aimed to produce 1.5 million pairs of Vertue shoes using 200 tons of recovered plastic, with each shoe incorporating around 13 plastic bottles.
In 2019 Greenfeet updated its original Climeate shoe, with yarns made from recycled plastic waste collected from beaches. The 2019 Climeate uses an EVA rubber sole.
For comparison, the original Greenfeet Climeate shoe (2004) featured two diagonal side stripes, a similar panel pattern on the upper, an EVA rubber sole, and a comparable colour scheme.
Which of the following physiological factors is most likely to affect the design of a hand tool for prolonged use?
An ergonomics researcher measured the average time taken for a participant to react to various sensory inputs during a simulated industrial task. The results are recorded in the table below.
| Sensory Input | Mean Reaction Time (ms) |
|---|---|
| Visual (Flashing Signal) | 245 |
| Haptic (Vibration) | 205 |
| Auditory (Warning Tone) | 165 |
| Visual (Text Display) | 390 |
Based on this physiological data, which sensory input should be prioritized for a time-critical safety alert?
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Practice IB Design Technology (DT) Topic 1.1c Physiological Factors with authentic exam-style questions for both SL and HL students. This question bank focuses on the exact syllabus content for 1.1c Physiological Factors and mirrors Paper 1, 2, 3 style where relevant.
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| Category | Subcategory | % |
|---|
| Manufacturing | Raw materials | 46% |
| Production sites | 4% | |
| Supply | Supplier (tier 2) | 12% |
| Supplier (tier 1) | 7% | |
| Distribution | Wholesale | 2% |
| Retail | 3% | |
| Direct | 2% | |
| Administration | Staff | 14% |
| Offices | 6% | |
| End of Sale | 4% |
