Hazardous Materials Response Flashcards
7 cards from real Firefighter practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Hazardous Materials Response flashcards as text
Class 8 hazardous materials are best described as what?
Answer: Corrosives
Hazard Class 8 covers corrosive materials such as acids and bases.
What does the blue quadrant of the NFPA 704 diamond indicate?
Answer: Health hazard
The blue (left) quadrant rates the health hazard of a material.
An NFPA 704 white quadrant containing the symbol 'W' with a slash means what?
Answer: The material reacts dangerously with water
A slashed W warns that the material reacts dangerously with water.
In the NFPA 704 numbering system, what does a rating of 4 signify?
Answer: Severe/extreme hazard
A rating of 4 is the highest, indicating a severe or extreme hazard.
Which monitoring instrument detects the presence of combustible gases in air?
Answer: Combustible gas indicator (LEL meter)
A combustible gas indicator measures the lower explosive limit of flammable vapors.
What term describes the lowest temperature at which a liquid produces enough vapor to ignite?
Answer: Flash point
Flash point is the minimum temperature at which a liquid gives off ignitable vapor.
A vapor density greater than 1 indicates that a gas will do what relative to air?
Answer: Sink and collect in low areas
A vapor density above 1 means the gas is heavier than air and settles in low spots.