Identify the development of the SCBA
-:- A. Evolution
B. Closed-circuit
C. Open-circuit
Identify the development of the SCBA
A. Evolution
-:- 1. Breathing through beard
2. Pumping air to a mask
3. Independent air supply
Identify the development of the SCBA
B. Closed-circuit
-:- 1...
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
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
Identify the hazardous environments requiring the use of respiratory protection
4|P a g e | G r a d e A + | 2 0 2 0 2 5
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