Gas chamber carbon monoxide as the lethal agent. Sometimes a box filled with anesthetic gas is used to anesthetize small animals for surgery or euthanasia. Gas chamber A gas chamber is an apparatus for killing humans or other animals with gas, consisting of a sealed chamber into which a poisonous or asphyxiant gas is introduced. The most commonly used poisonous agent is hydrogen cyanide; carbon dioxide and carbon monoxide have also been used. Gas chambers were used as a method of execution for condemned prisoners in the United States beginning in the 1920s and continue to be a legal execution method in
Gas engine 1-hour rating, 12-hour rating and continuous rating) where as the gas engine will generally only have a Continuous rating, which will be less than the Diesel Continuous rating. Various ignition systems have been used, including hot-tube ignitors and spark ignition. Most modern gas engines are essentially dual-fuel engines. The main source of energy is the gas-air mixture but it is ignited by the injection of a small volume of diesel fuel. Gas engines that run on natural gas typically have a thermal efficiency between 35-45% (LCV basis)., The best engines can achieve a thermal efficiency of slightly more than 48%