Emergency Response and Safety Flashcards
7 cards from real CARO practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Emergency Response and Safety flashcards as text
What is the IDLH (Immediately Dangerous to Life or Health) concentration for ammonia established by NIOSH?
Answer: 300 ppm
NIOSH lists 300 ppm as the IDLH concentration for ammonia.
What is the OSHA permissible exposure limit (PEL) for ammonia as an 8-hour time-weighted average?
Answer: 50 ppm
OSHA 29 CFR 1910.1000 sets the ammonia PEL at 50 ppm TWA.
An operator gets liquid ammonia splashed in the eyes. What is the correct first-aid action?
Answer: Flush with clean water for at least 15 minutes
Immediate, continuous flushing with water for at least 15 minutes is the standard first aid for ammonia eye exposure.
Because anhydrous ammonia vapor is lighter than air, where would a leak typically accumulate in an enclosed machinery room?
Answer: Near the ceiling
Ammonia vapor has a density of about 0.6 relative to air, so it rises toward the ceiling.
Where should the emergency shutdown switch for a refrigeration machinery room be located?
Answer: Outside the machinery room, near the principal entrance
Codes require the emergency stop to be outside the machinery room so it can be activated without entering a contaminated area.
Which type of respiratory protection is required for entry into an ammonia atmosphere at or above IDLH levels?
Answer: Self-contained breathing apparatus (SCBA)
Atmospheres at or above IDLH require supplied air such as positive-pressure SCBA.
Within what approximate concentration range in air is ammonia flammable?
Answer: 15% to 28%
Ammonia has a flammable range of roughly 15-28% by volume in air, a range only reached in severe releases.