Which of the following are gases that turn into liquid at or below -130°F (-90°C) at 14.7 psi (101 kPa) {1.01 bar}?
A. Cryogens
B. Liquefied gases
C. Frozen materials
D. Elevated-temperature materials
A
Health Professions
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Foam tanks on municipal fire pumpers are often designated to be refilled:
A. directly from 1 gallon ( 4 L) containers. B. directly from 5 gallon ( 20 L) containers. C. indirectly from larger portable containers. D. only after returning to the fire department station.
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A chronic disease caused by demyelination of nerve tissue is ____.
A. Alzheimer's disease B. amyotrophic lateral sclerosis C. multiple sclerosis D. epilepsy E. sciatica
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