Confined Space Entry Procedures Flashcards
7 cards from real STSC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Confined Space Entry Procedures flashcards as text
When testing the atmosphere of a confined space prior to entry, what is the correct order for measuring atmospheric hazards?
Answer: Oxygen content, then flammability, then toxic contaminants
OSHA and industry best practice require testing oxygen content first, then flammability (LEL), then toxic contaminants, because low oxygen can affect sensor accuracy.
A confined space entry is interrupted by an uncontrolled condition not covered by the existing permit. What must the entry supervisor do?
Answer: Ensure all entrants immediately exit and cancel the permit
Any condition not covered or allowed by the permit requires all entrants to exit immediately and the permit to be cancelled until the new hazard is addressed.
What is the primary purpose of a retrieval system in confined space entry operations?
Answer: To enable non-entry rescue of an entrant without requiring rescuers to enter the space
A retrieval system allows entrants to be extracted from a confined space by the attendant or rescuers without requiring anyone else to enter the hazardous environment.
Which scenario would classify a confined space as 'permit-required' under OSHA 29 CFR 1910.146?
Answer: A utility vault that contains a potential engulfment hazard from accumulated water
A space with a potential engulfment hazard — such as accumulated water — meets the definition of a permit-required confined space under OSHA.
After all entrants have exited and work is complete, what must happen to the entry permit?
Answer: It must be cancelled, retained by the employer for at least one year, and reviewed to improve the program
Completed permits must be cancelled and retained for at least one year so employers can review them to identify and correct problems in the permit program.
An attendant monitoring a confined space entry is approached by a supervisor who orders the attendant to perform a task away from the entry point. What should the attendant do?
Answer: Have entrants exit the space before leaving the monitoring station
The attendant must never leave the entry point while entrants are inside; if they must leave, all entrants must exit the space first.
What does 'IDLH' stand for, and why is it critical for confined space planning?
Answer: Immediately Dangerous to Life or Health — it defines exposure levels that pose immediate severe risk, requiring air-supplied respirators
IDLH (Immediately Dangerous to Life or Health) describes airborne concentrations that pose an immediate risk of death or severe health effects, mandating the use of self-contained or supplied-air respirators.