ASP ASP Hazardous Materials and Chemical Safety 4 — Questions and Answers
Question 1: Which NFPA 704 diamond quadrant color indicates health hazard?
- Red (top)
- Blue (left) (Correct answer)
- Yellow (right)
- White (bottom)
Correct answer: Blue (left)
The blue quadrant on the left of the NFPA 704 diamond represents health hazard, rated 0–4.
Question 2: Under OSHA's HazCom standard (29 CFR 1910.1200), what is the primary purpose of a Safety Data Sheet (SDS)?
- Provide emergency evacuation routes
- Communicate chemical hazard information to workers (Correct answer)
- Document workplace injury records
- List required PPE for all operations
Correct answer: Communicate chemical hazard information to workers
SDS documents communicate chemical hazards, safe handling, and emergency response information as required by HazCom 2012.
Question 3: What term describes the minimum concentration of a flammable vapor in air that will ignite?
- Flash point
- Autoignition temperature
- Lower flammable limit (LFL) (Correct answer)
- Vapor pressure
Correct answer: Lower flammable limit (LFL)
The lower flammable limit (LFL) is the minimum vapor concentration in air that can sustain ignition.
Question 4: A chemical with a vapor density greater than 1.0 will:
- Rise and accumulate near the ceiling
- Disperse uniformly throughout the room
- Sink and accumulate near the floor (Correct answer)
- React with oxygen in the upper atmosphere
Correct answer: Sink and accumulate near the floor
Vapors with density >1.0 (relative to air) are heavier than air and settle in low-lying areas, creating ignition and asphyxiation hazards.
Question 5: Which DOT hazard class covers oxidizers?
- Class 3
- Class 4
- Class 5 (Correct answer)
- Class 8
Correct answer: Class 5
DOT Class 5 covers oxidizing substances (Division 5.1) and organic peroxides (Division 5.2).
Question 6: The IDLH (Immediately Dangerous to Life or Health) value for a chemical is used to:
- Set the permissible exposure limit for an 8-hour workday
- Define the concentration at which escape may be impaired (Correct answer)
- Establish the odor threshold for the substance
- Determine the flash point of flammable liquids
Correct answer: Define the concentration at which escape may be impaired
IDLH is the airborne concentration that poses an immediate threat to life or could impair escape ability within 30 minutes.
Question 7: What is the primary regulatory framework governing the emergency response to hazardous materials incidents in the US?
- OSHA 29 CFR 1910.119 (PSM)
- EPA 40 CFR Part 68 (RMP)
- OSHA 29 CFR 1910.120 (HAZWOPER) (Correct answer)
- DOT 49 CFR Part 172
Correct answer: OSHA 29 CFR 1910.120 (HAZWOPER)
HAZWOPER (29 CFR 1910.120) establishes training and operational requirements for hazardous waste operations and emergency response.
ASP ASP Hazardous Materials and Chemical Safety 4
Which NFPA 704 diamond quadrant color indicates health hazard?