Podcast
Questions and Answers
Heat stress indices can be classified into only two types: single measurements and empirical methods.
Heat stress indices can be classified into only two types: single measurements and empirical methods.
False
The wet bulb temperature of the ambient air is the most powerful variable affecting body cooling in hot and humid environments.
The wet bulb temperature of the ambient air is the most powerful variable affecting body cooling in hot and humid environments.
True
Many mines use the dry bulb temperature as the sole indicator of climatic acceptability.
Many mines use the dry bulb temperature as the sole indicator of climatic acceptability.
False
Air velocity has a limited effect on climatic acceptability in hot mine environments.
Air velocity has a limited effect on climatic acceptability in hot mine environments.
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A psychrometric wet bulb temperature of $27^\circ\text{C}$ or $28^\circ\text{C}$ may be used as a criterion above which work rates or shift hours are reduced.
A psychrometric wet bulb temperature of $27^\circ\text{C}$ or $28^\circ\text{C}$ may be used as a criterion above which work rates or shift hours are reduced.
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Dry bulb temperature alone gives a reliable indication of physiological reaction in hot mine environments.
Dry bulb temperature alone gives a reliable indication of physiological reaction in hot mine environments.
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The natural wet bulb temperature is measured by a non-aspirated wet bulb thermometer held stationary within the prevailing airstream.
The natural wet bulb temperature is measured by a non-aspirated wet bulb thermometer held stationary within the prevailing airstream.
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A psychrometric wet bulb temperature of $32^\circ\text{C}$ is considered an upper limit of acceptability in mines.
A psychrometric wet bulb temperature of $32^\circ\text{C}$ is considered an upper limit of acceptability in mines.
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The wet bulb temperature is the only factor considered for determining climatic acceptability in hot mine environments.
The wet bulb temperature is the only factor considered for determining climatic acceptability in hot mine environments.
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The natural wet bulb temperature is measured by an aspirated wet bulb thermometer.
The natural wet bulb temperature is measured by an aspirated wet bulb thermometer.
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Study Notes
Heat Stress Indices
- Heat stress indices can be classified into two categories: single measurements and empirical methods.
Wet Bulb Temperature
- The wet bulb temperature is the most influential variable affecting body cooling in hot and humid conditions.
- A psychrometric wet bulb temperature of 27°C or 28°C can be used as a threshold for reducing work rates or shift hours in a hot mine environment.
- A psychrometric wet bulb temperature of 32°C is considered a limit of acceptability in mines.
- The wet bulb temperature is the primary factor considered to determine climatic acceptability in hot mine environments.
Natural Wet Bulb Temperature
- The natural wet bulb temperature is measured using a non-aspirated wet bulb thermometer held stationary in the prevailing airstream.
Dry Bulb Temperature
- Many mines use the dry bulb temperature as the sole indicator of acceptable climate.
- Dry bulb temperature alone provides a reliable indication of physiological response in hot mine environments.
- Air velocity has a limited effect on climatic acceptability in hot mine environments.
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Description
Explore the concept of heat stress and its impact on human performance and safety. Learn about the various manifestations of heat-related injuries such as heat rash, heat cramps, and heat stroke.
