Questions and Answers
What is the A1 alarm value for oxygen deficiency?
Which gas has an A2 alarm value of 50ppm?
What is the A1 alarm value for the Lower Explosive Limit (LEL) of methane?
Which of the following gases has the highest A1 alarm value?
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What is the A2 alarm value for Hydrogen Sulfide?
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Which of the following compounds is NOT detected by the OV sensor?
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Study Notes
Oxygen Alarm Values
- A1 Alarm: 19.5% indicates oxygen deficiency, posing a risk to health.
- A2 Alarm: 23.5% indicates oxygen enrichment, which can cause increased fire risks.
Lower Explosive Limit (Methane)
- A1 Alarm: 10% LEL indicates the lower threshold for explosive risk.
- A2 Alarm: 20% LEL indicates increased potential for explosion.
Carbon Monoxide Alarm Values
- A1 Alarm: 35ppm is the threshold for significant health concerns.
- A2 Alarm: 50ppm represents a critical level requiring immediate action.
Hydrogen Sulfide Alarm Values
- A1 Alarm: 10ppm signifies health risks, as it is highly toxic.
- A2 Alarm: 15ppm raises the severity of the hazard.
Hydrogen Cyanide Alarm Values
- A1 Alarm: 2.5ppm indicates a dangerous, potentially lethal exposure level.
- A2 Alarm: 4.5ppm further escalates the risk of poisoning.
Organic Vapors Alarm Values
- A1 Alarm: 5ppm is the limit for health concerns associated with organic vapors.
- A2 Alarm: 10ppm increases the danger related to organic vapor exposure.
Organic Vapor Sensor Detection
- Detects 12 different compounds, highlighting the range of potential chemical hazards:
- Ethylene oxide
- Propylene oxide
- Ethene
- Propene
- Vinyl chloride
- Methanol
- Ethanol
- Acetaldehyde
- Butadiene
- Formaldehyde
- Vinyl Acetate
- Isopropanol
Supersession History
- SOG #1525 issued on 07/01/2005 and revised on 11/03/2017.
- SOG #320-03 Attachment A underwent clerical changes on 05/01/2018.
- Recent revisions occurred on 07/21/2021, providing updated context and clarity on alarm values.
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Description
Test your knowledge on the alarm values for oxygen, LEL, and carbon monoxide as outlined in SOG 320-03. This quiz will focus specifically on A1 and A2 alarm thresholds. Perfect for fire rescue professionals looking to refresh their understanding of safety protocols.
