Which gas, which constitutes a danger in mines, is also known as Firedamp or Marsh Gas?
Marsh gas Marsh gas Marsh gas, swamp gas and bog gas is a mixture of methane, hydrogen sulfide and carbon dioxide, produced naturally within some geographical marshes, swamps, and bogs. The surface of marshes, swamps and bogs is initially porous vegetation that rots to form a crust that prevents oxygen from reaching the organic material trapped below. That is the condition that allows anaerobic digestion and fermentation of any plant or animal material which incidentally also produces methane. In some cases there is sufficient heat, fuel and oxygen to allow spontaneous combustion and underground fires to smolder for some considerable time as
Combined gas or gas turbine running at 50% power. The system is currently used in the 3 ships of the Russian Navy's s, in the Royal Navy Type 42 destroyers, the Japanese Maritime Self-Defense Force's Hatsuyuki-class destroyers, the Royal Canadian Navy s, and the Dutch Navy s (on which the Greek Navy s are based). Combined gas or gas Combined gas or gas (COGOG) is a propulsion system for ships using gas turbine engines. A high efficiency, low output turbine is used for cruising speeds with a high output turbine being used for high-speed operations. A clutch allows either turbine to be selected, but