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In a volume protected by hypoxic air, a normobaric hypoxic atmosphere is continuously retained: hypoxic means that the partial pressure of the oxygen is lower than at the sea level, normobaric means that the barometric pressure is equal to the barometric pressure at the sea level. Usually 1/4 to 1/2 of the oxygen contained in the air (that is ...
A high-resistance connection (HRC) is a hazard that results from loose or poor connections in traditional electrical accessories and switchgear which can cause heat to develop, capable of starting a fire. [1] Glowing connections occur when relatively high current exists in a relatively large resistance object. Heat comes from power dissipation ...
It is a highly effective fire suppression method for class A, B, C, E and F (as is the case for most fire-extinguishing agents, it is not applicable to metal fires – class D). [1] Some aerosol-generating compounds (e.g., potassium nitrate -based) produce a corrosive by-product that may damage electronic equipment, although later generations ...
Fire prevention is a function of many fire departments. The goal of fire prevention is to educate the public on the precautions that should be taken to prevent potentially harmful fires from occurring. It is a proactive method of preventing fire-based emergencies and reducing the damage caused by them. Fire prevention education can take the ...
Back pressure can force an undesirable contaminant to enter potable water piping. Sources of back pressure may be boilers, heat exchanging equipment, power washing equipment, fire sprinklers, or pumps in the water distribution system. In some cases there may be an almost continuous risk of overcoming the static water pressure in the piping.
In some systems, firefighters have the option of pumping a Fire Department Connection (FDC) which will increase the water pressure at a standpipe in the event of a fire pump failure or loss of pressure. Typically, these systems pressurize the sprinkler system or the standpipe but not both at the same time.