The oxygen level in a confined space should be at least _____ percent by volume.

Quesiton : The oxygen level in a confined space should be at least _____ percent by volume.

Answer: 19.5

The oxygen level in a confined space should be at least _____ percent by volume. The oxygen level in a confined space should be at least _____ percent by volume . 19.5 Before endorsing the permit who verifies that all tests have been conducted and that all procedures and equipment are in place? Oxygen-deficient atmospheres are the leading cause of confined space fatalities in the shipyard. While normal atmosphere contains between 20.8 and 21 percent oxygen OSHA defines as oxygen deficient any atmosphere that contains less than 19.5 percent oxygen and as oxygen enriched any atmosphere that contains more than 22 percent. A confined space should always contain an oxygen level of at least 19.5 percent by volume. Correct answer is: Explanation: Oxygen levels that are too low (less than 19.5 percent) can cause an initial loss of awareness and lead to suffocation and death. Oxygen levels that are too high (greater than 22 percent) can cause a fire hazard by allowing a fire to burn at a rate that is faster than normal. Tue Dec 01 2009 00:00:00 GMT+0530 (IST) · If inert gases like argon and nitrogen enter a space they displace some of the atmospheric air. When this happens the amount of oxygen and thus its partial pressure goes down. For example assume that nitrogen leaks into a space lowering the oxygen level to 19.5 percent. The oxygen partial pressure is now 19.5 percent of 760 mm Hg or 148 mm Hg . Occupational Safety and Health Administration. At oxygen levels of 10 to 14 percent faulty judgment intermittent respiration and exhaustion can be expected even with minimal exertion (Exs. 25-4 and 150). Breathing air containing 6 to 10 percent oxygen results in nausea vomiting lethargic movements and perhaps unconsciousness. Oxygen -deficient atmospheres are the leading cause of confined space fatalities . While normal atmosphere contains between 20.8 and 21 percent oxygen OSHA [Occupational Safety and Health Administration] defines as oxygen deficient any atmosphere that contains less than 19.5 percent oxygen and as oxygen enriched any atmosphere that contains more than 22 percent . Painting contractors should always be very cautious of the atmosphere when working in new areas. Crews should check with the host employer or general contractor and discuss the hazards on the work site. The level of oxygen for safe operations must be between 19.5 percent and 23.5 percent by volume. sulfide carbon monoxide and high or low oxygen levels . Oxygen Concentration OSHA acceptable levels are between 19.5% and 23.5%. The : ... in percent of LEL or in percent by volume . ... circumstances should a confined space be entered or monitoring