Health Care > EXAMs > Certified Safety Professional Exam: Updated A+ Guide Solution (All)

Certified Safety Professional Exam: Updated A+ Guide Solution

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Components of a dilution system (Ans- Source of air exhaust Source of air supply A duct system A method to filter and temper incoming air Local exhaust ventilation (Ans- Designed to cont ... rol contaminants at the source before mixing with breathing air occurs. It is used to control the following: Highly toxic substances Single-source emissions Direct worker exposure Components of a local exhaust system (Ans- A. Hood B. Duct C. Air-cleaning device D. Fan E. Stack Capture velocity (Ans- The minimum velocity of hood-induced air necessary to capture the contaminant. Canopy Hood (Ans- Canopy hoods are used where hot gases and vapors are encountered and workers do not work directly over the source of emissions. Major drawback to use is the potential for the worker to place himself or herself between the contaminants and the exhaust stream. Down draft hood (Ans- Used where heavier than air contaminants exist, which are not being propelled away from the source of the contaminant release This type of ventilation system draws the air downward and away from the workers breathing zone. Enclosure hood (Ans- This hood encloses the contaminant source and the air is forced in an opposite direction (upward, downward, or backward away from the worker) Receiving hood (Ans- Are used at the point of contaminant generation An example would be a welding fume exhaust system that can be placed very close to the point of the contaminant generation Flanged hood opening (Ans- Have some type of "lip" on them. Sometimes designed to create a certain desired flow Plain hood openings (Ans- Plain openings do not have a flange and therefore air movement is directly into the duct. [Show More]

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