Questions and Answers
What does APR stand for?
What are the two classifications of respirators?
What is recommended for unknown atmospheres?
Positive Pressure Demand Self Contained Breathing Apparatus (SCBA) or Positive Pressure Demand Supplied Air Respirators (SAR)
What are the four basic components of an SCBA?
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How can you determine the duration of an SCBA air cylinder's use?
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What are some requirements for airline equipment?
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What are the two types of air purifying respirators?
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What is the difference between the two types of air purifying respirators?
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What are the criteria for selecting respiratory protection at hazardous waste sites?
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Study Notes
Respirator Protection Equipment
- APR: Air-Purifying Respirator that filters specific air contaminants from ambient air using a purification element.
- ASR: Atmosphere-Supplying Respirator provides breathing air from an external source. Includes Supplied-Air Respirators (SARs) and Self-Contained Breathing Apparatus (SCBAs).
- Dusts: Fine particles from solid materials that can float in the air, produced by activities such as grinding and drilling; can pose fire and explosion hazards.
- Fit Test: A procedure to evaluate how well a respirator fits an individual. Can be qualitative (pass/fail based on user response) or quantitative (measures leakage numerically).
- Fumes: Small particles formed when solid materials vaporize at high temperatures and cool into particles less than one micrometer, common in welding and smelting.
- Mists: Formed by atomizing liquids and can be produced through spraying or mixing; consist of tiny liquid particles suspended in the air.
- PAPR: Powered Air-Purifying Respirator that uses a blower to deliver filtered air to the user, enhancing comfort and safety.
- SAR: Supplied-Air Respirator where the source of breathing air is not carried by the user, often used in controlled environments.
- SCBA: Self-Contained Breathing Apparatus designed to be carried by the user, featuring its own air supply for independence from the surrounding atmosphere.
- Vapors: Gaseous particles from liquids and solids evaporating at room temperature; examples include gasoline and paint thinners.
Classifications of Respirators
- Divided into respirators for IDLH (Immediately Dangerous to Life or Health) and non-IDLH atmospheres.
- Recommended for unknown atmospheres: Positive Pressure Demand SCBA and SAR.
Components of SCBA
- Backpack and harness assembly for support.
- Air cylinder assembly includes the cylinder, valve, and pressure gauge.
- Regulator assembly features a high-pressure hose and low-pressure alarm.
- Facepiece assembly contains the breathing tube, exhalation valve, and head harness.
SCBA Air Cylinder Duration
- Duration dependent on work conditions: light, medium, or heavy.
- Average time can be established based on workload and the capacity of each team member.
Requirements for Airline Equipment
- Specific requirements for safe and effective use in hazardous environments.
Types of Air Purifying Respirators
- Particulate Air Respirators: Utilize mechanical filter elements to remove particulates.
- Gas and Vapor Respirators: Employ chemical sorbents that react to purify the air.
Criteria for Selecting Respiratory Protection
- Must identify contaminants present.
- Continuous monitoring of contaminant concentrations is essential for safety.
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Description
Test your knowledge of essential vocabulary related to respirator protection equipment. This quiz focuses on the definitions of key terms such as Air-Purifying Respirator (APR) and Atmosphere-Supplying Respirator (ASR). Ideal for students and professionals in safety and health fields.
