MINE RESCUE (Jeopardy Category No. 1 FIRE FIGHTING – The particles in smoke are usually __________. Soot Carbon Tar-like substances Hydrocarbons All of the above The stream of dry chemical of a fire extinguisher must be directed: 12 inches ahead of the flame edge Directly at the flame 6 inches behind the flame edge None of the above Dry chemical extinguishers stop the reaction between: Fuel and ignition source Oxygen and fuel Oxygen and ignition source Fuel and heat Class fires are best extinguished by: “C” Water High expansion foam Carbon dioxide and certain dry chemicals Low expansion foam Which of the following is not a main factor to consider when unsealing a fire: Extent and intensity of the fire at the time of sealing Tightness of the seals Effect of barometric pressure on the enclosed area Location of the fire with respect to egress Gas conditions as indicated by analysis of air samples taken from behind the seals When sealing an underground mine fire area, after temporary seals are erected, a waiting period of _______ is recommended before beginning construction on permanent seals. 24 to 48 hours 48 to 72 hours about 72 hours at least 7 days
MINE RESCUE (Jeopardy Category No. 1 – FIRE FIGHTING The particles in smoke are usually __________. Soot Carbon Tar-like substances Hydrocarbons All of the above The stream of dry chemical of a fire extinguisher must be directed: 12 inches ahead of the flame edge Directly at the flame 6 inches behind the flame edge None of the above Dry chemical extinguishers stop the reaction between: Fuel and ignition source Oxygen and fuel Oxygen and ignition source Fuel and heat Class “C” fires are best extinguished by: Water High expansion foam Carbon dioxide and certain dry chemicals Low expansion foam Which of the following is not a main factor to consider when unsealing a fire: Extent and intensity of the fire at the time of sealing Tightness of the seals Effect of barometric pressure on the enclosed area Location of the fire with respect to egress Gas conditions as indicated by analysis of air samples taken from behind the seals When sealing an underground mine fire area, after temporary seals are erected, a waiting period of _______ is recommended before beginning construction on permanent seals. 24 to 48 hours 48 to 72 hours about 72 hours at least 7 days
MINE_RESCUE_Multiple_Choice.docx