Confined Space Entry and Rescue Flashcards
7 cards from real CHST 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 and Rescue flashcards as text
During a confined space rescue, a would-be rescuer enters without proper equipment and is overcome by the same hazard as the original victim. This is known as:
Answer: Cascade rescue failure
A cascade rescue failure (also called a multiple-casualty incident) occurs when untrained rescuers enter a permit space and become victims themselves.
OSHA 29 CFR 1926.1203 requires that before an employee enters any space that may be a permit-required confined space, the employer must:
Answer: Evaluate the space to determine if it is permit-required
Employers must evaluate each potential permit-required confined space before entry to determine whether permit-required conditions exist.
Which condition would allow a permit-required confined space to be reclassified as a non-permit confined space for entry?
Answer: All hazards within the space are eliminated or isolated before entry
A permit space may be reclassified as non-permit only when all actual hazards have been eliminated or isolated and the space is verified safe by testing.
When using a tripod and mechanical retrieval system for vertical confined space rescue, the retrieval line must be attached to the entrant's:
Answer: Full-body harness chest or back D-ring
OSHA requires the retrieval line to be attached to the entrant's full-body harness at the chest or back D-ring to allow safe vertical retrieval.
A confined space attendant observes an unauthorized person attempting to enter the permit space. The attendant's FIRST action should be to:
Answer: Warn the unauthorized person to stay out and inform the supervisor
The attendant must warn unauthorized individuals away and notify the entry supervisor; physically restraining someone is not the attendant's role.
Hydrogen sulfide (H₂S) is especially dangerous in confined spaces because it:
Answer: Desensitizes the sense of smell at high concentrations, masking its presence
H₂S paralyzes the olfactory nerve at elevated concentrations, so workers may no longer smell the 'rotten egg' odor and underestimate the danger.
According to OSHA confined space standards, which of the following is NOT a required element of a permit-required confined space entry permit?
Answer: Workers' compensation insurance policy number
Entry permits must include space identification, date, authorized entrants, attendants, supervisors, hazards, controls, equipment, and communications—not insurance information.