Confined Space Entry Procedures Flashcards
6 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 6 Confined Space Entry Procedures flashcards as text
Which of the following is NOT a characteristic that makes a space a 'confined space' under OSHA's construction standard?
Answer: Contains a known atmospheric hazard
A known atmospheric hazard makes a space permit-required, but a space can be a confined space without any existing hazard.
What oxygen concentration level is considered immediately dangerous to life or health (IDLH)?
Answer: Below 16%
An oxygen level below 16% is considered IDLH, though levels below 19.5% are already considered oxygen-deficient.
Before a contractor begins work in a permit-required confined space owned or controlled by the host employer, the host employer must:
Answer: Inform the contractor of permit space hazards, precautions, and emergency procedures
The host employer must provide information about hazards, precautions taken, and emergency procedures to any contractor working in permit spaces.
A 'blanking or blinding' isolation method in confined space work refers to:
Answer: Installing a solid plate to completely block a line or pipe
Blanking or blinding involves installing a solid plate (blind) to completely seal a line, preventing flow into the confined space.
How long must cancelled entry permits be retained by the employer?
Answer: 1 year
OSHA requires cancelled entry permits to be retained for at least 1 year to facilitate review of the permit program.
Which condition requires immediate evacuation from a permit-required confined space?
Answer: The attendant detecting a prohibited condition
The attendant must order evacuation when a prohibited condition or behavioral change in an entrant suggests exposure to a dangerous atmosphere.