Workplace Safety Flashcards

7 cards from real NSC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Workplace Safety flashcards as text

Which of the following is NOT one of the three elements of the fire triangle?
Answer: Pressure
The fire triangle consists of heat, fuel, and oxygen; pressure is not required for combustion.
A worker is exposed to 50 ppm of a chemical for 4 hours and 100 ppm for 4 hours. What is the 8-hour TWA?
Answer: 75 ppm
TWA = (50×4 + 100×4) / 8 = 600 / 8 = 75 ppm.
What is the role of the 'attendant' in a confined space entry operation?
Answer: To remain outside and monitor the entrant, summoning rescue if needed
The attendant stays outside the permit space, monitors entrants continuously, and initiates rescue procedures if an emergency occurs.
OSHA's general industry standard requires fall protection when workers are exposed to fall heights of how many feet or more?
Answer: 4 feet
OSHA 29 CFR 1910.23 requires fall protection in general industry at heights of 4 feet or more.
Which OSHA standard gives workers the 'right to know' about chemical hazards in their workplace?
Answer: Hazard Communication Standard (HCS)
The Hazard Communication Standard (29 CFR 1910.1200) requires chemical labeling and SDS access so workers know about hazards.
A yellow diamond on a DOT hazard placard typically indicates which class of material?
Answer: Oxidizer or organic peroxide
Yellow DOT placards signify oxidizers or organic peroxides, which can intensify fires by supplying additional oxygen.
Which respirator provides the highest level of protection and is used in immediately dangerous to life or health (IDLH) atmospheres?
Answer: Self-contained breathing apparatus (SCBA)
An SCBA supplies its own independent air source, giving the highest protection factor and is required in IDLH atmospheres.