Podcast Beta
Questions and Answers
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.
True
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.
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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.
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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.
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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.
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The natural wet bulb temperature is measured by an aspirated wet bulb thermometer.
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