Why do deep sea divers use an inert gas in their air tanks?

Which inert gas is used by sea divers?

Neon (Ne) is an inert gas sometimes used in deep commercial diving but is very expensive. Like helium, it is less narcotic than nitrogen, but unlike helium, it does not distort the diver’s voice.

Why do they put nitrogen in scuba tanks?

Use of these gases is generally intended to improve overall safety of the planned dive, by reducing the risk of decompression sickness and/or nitrogen narcosis, and may improve ease of breathing.

Which gas is used in scuba tank?

Trimix consists of oxygen, nitrogen and an inert gas, normally helium. Adding an inert gas to the mix allows divers to dive deeper than they could with nitrox (with less risk of becoming narced) and is often used in technical (tec / tech) diving.

Which noble gas is used by sea divers?

We can understand from the above discussion that deep-sea divers use a mixture of helium and oxygen. Therefore, the correct answer is option (A) helium-oxygen. Note: We know that air is a mixture of 21% oxygen, 78% nitrogen and 1% of other noble gases.

Why do divers not use pure oxygen?

Diving with pure oxygen deeper than 20 feet can cause a person to absorb more oxygen than his system can safely handle, leading to central nervous system (CNS) oxygen toxicity. CNS oxygen toxicity causes a diver to go into convulsions (among other things).

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Why do deep sea divers use helium?

The main reason for adding helium to the breathing mix is to reduce the proportions of nitrogen and oxygen below those of air, to allow the gas mix to be breathed safely on deep dives. … Helium has very little narcotic effect. A lower proportion of oxygen reduces the risk of oxygen toxicity on deep dives.

How deep can you dive on pure oxygen?

The safe depth limit for this oxygen level is over 180 feet / 55m, so it isn’t an issue for a recreational diver whose maximum depth limit with training and experience is 130 feet / 40m. If a diver did want to use pure oxygen, then the maximum depth it could safely be breathed at is 13ft / 4m.

Can you breathe pure oxygen underwater?

Divers breathing pure oxygen need to carry much smaller amounts of gas and produce no bubbles, but there are problems, some of which can be fatal. … Flushing the system with pure oxygen periodically overcomes this problem, but high partial pressures of oxygen increase blood pressure and reduce heart rate.

Do divers breathe pure oxygen?

Contrary to popular belief, scuba divers don’t only breathe oxygen underwater. After all, we don’t breathe pure oxygen above water either. … Divers go way deeper and explore much longer with mixtures such as nitrox, heliox, and hydrox as these are safer alternatives to simple compressed air.