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| Q. |
In deep-sea diving, divers use a mixture of gases consisting of oxygen and – |
| A. | hydrogen |
| B. | nitrogen |
| C. | argon |
| D. | helium |
| Answer» B. nitrogen | |
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Explanation: Air is not the "ideal" breathing mixture for diving as with a concentration of approximately 79 percent nitrogen, compressed air poses two potential problems for all divers: susceptibility to nitrogen narcosis and at deeper depths; and decompression sickness. So divers use Nitrox, a gaseous mixture of nitrogen and oxygen. It is also known as 'Enriched Air.' |
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