SCBA (Self Contained Breathing Apparatus) Questions With Answers Graded A+ Assured Success

Identify the physical requirements of the SCBA user - A. Physical B. Agility C. Facial features D. Medical E. Menta Identify the hazardous environments requiring the use of respiratory protection C. Smoke - 1. Smoke is the product of incomplete combustion 2. Suspended particles provide a means for the condensation of some of the gaseous products of combustion 3. Some of these particles are lethal; some are irritating 4. Size of particle determines how deeply they will penetrate into the lung A. Oxygen deficiency - 1. Combustion process consumes oxygen 2. Production of toxic gases may displace oxygen 3. Oxygen concentration diluted by other gases during combustion process 4. Physiological effects of reduced oxygen (hypoxia) Identify the development of the SCBA A. Evolution - 1. Breathing through beard 2. Pumping air to a mask 3. Independent air supplyIdentify the development of the SCBA B. Closed-circuit - 1. Cylinder of compressed air 2. Regulator and valves Identify the development of the SCBA C. Open-circuit - 1. Cylinder of oxygen 2. Filter system 3. Regulator and valves Identify the development of the SCBA - A. Evolution B. Closed-circuit C. Open-circuit Identify the hazardous environments requiring the use of respiratory protection - A. Oxygen deficiency B. Elevated temperatures / super heated air C. Smoke D. Toxic gases Identify the hazardous environments requiring the use of respiratory protection a. 21% oxygen in air (Normal) b. 19.5% OSHA and NFPA definition as oxygen deficient c. 17% oxygen in air i) Some muscular impairment ii) Increase in respiratory rate d. 12 % oxygen in air-Dizziness, headache, rapid fatigue e. 9% oxygen in air-Unconsciousnessf. 6% or less oxygen in air-Death occurs in minutes from respiratory failure and concurrent heart failure Identify the hazardous environments requiring the use of respiratory protection B. Elevated temperatures / super heated air - 1. Heated air can damage respiratory tract a. Excessive heat (120-130 degrees) i) Blood pressure drop ii) Circulatory failure b. Inhalation of heated gases i) Pulmonary edema ii) Death from asphyxiation c. Respiratory tissue injury is not immediately reversible with the introduction of fresh, cool air Identify the hazardous environments requiring the use of respiratory protection D. Toxic gases - 1. During fires, a firefighter will be exposed to various combinations of irritants and toxicants 2. Harmful effects of inhaled toxic gases 3. Commonly found fire gases Toxic Gases 1. During fires, a firefighter will be exposed to various combinations of irritants and toxicants - 1. During fires, a firefighter will be exposed to various combinations of irritants and toxicants a. Each fire will present differing products of combustion b. Combinations may have a synergistic effectToxic Gases 2. Harmful effects of inhaled toxic gases - 2. Harmful effects of inhaled toxic gases a. Disease of the lung tissue b. Impair the oxygen carrying capacity of red blood cells Toxic Gases 3. Commonly found fire gases - 1) Carbon monoxide (CO) i) More fire deaths occur from exposure to carbon monoxide than any other product of combustion ii) Colorless iii) Odorless iv) Present at every fire Results from incomplete combustion vi) Carbon monoxide combines with the bloods hemoglobin about 200 times more readily than oxygen causing oxygen to be excluded and eventually hypoxia will result vii) Concentrations of carbon monoxide above five hundredths of one percent (0.05%) (500 PPM) can be dangerous viii) Symptoms include: a) Headache b) Dizziness c) Nausea d) Vomiting e) Cherry-red skin coloration ix) Administering pure oxygen is the most important element in first aid carex) Brain injuries may appear up to three weeks after a severe exposure 2) Hydrogen chloride i) Colorless gas ii) Pungent odor iii) Causes swelling of upper respiratory tract a) Labored breathing b) Suffocation can result