[Confined Space Entry] Flashcards
The written or printed document that is provided by the Unit Safety Office to allow and control entry into a permit space
Entry permit
The person responsible for determining if acceptable entry conditions are present at a permit space where entry is planned, for authorized entry and overseeing entry operations, and for terminating entry as required
Entry supervisor
The surrounding and effective capture of a person by a liquid or finely-divided solid substance that can be aspirated to cause death
Engulfment
The 3 publications on confined space entry
TM 4-15.21
NFPA 306
29 CFR Part 1915
An individual stationed outside a permit-required confined space who monitors the authorized entrants and who performs all duties assigned in accordance with the unit’s permit space program
Attendant
What is
1) large enough that an individual can bodily enter and perform assigned work
2) has limited or restricted means for entry and exit
3) Not designed for continuous occupancy
Confined space
If a space is designated as non-permit, how long must initial atmospheric test results be documented and maintained following the entry?
1 year
How long after the completion of a hot work operation must fire watch remain on station?
30 minutes
The personnel designated to rescue personnel from permit spaces
Rescue team
What must all spaces that have the potential to contain atmospheric or other serious hazards be marked with?
“Danger Confined Space”
How far should welding or cutting operations be kept from exposed chlorinated solvents?
At least 200 ft
How far should compressed gas cylinders be stored from highly combustible materials?
At least 20 ft
The equipment used for non-entry rescue of persons from permit spaces
Retrieval system
Any occurrence to the permit space that could endanger entrants
Emergency
A space that meets the definition of a confined space and has one or more of these characteristics:
1) Contains or has a potential to contain a hazardous atmosphere
2) Contains a material that has the potential for engulfing an entrant
3) Has an internal configuration such that an entrant could be trapped or asphyxiated by inwardly converging walls or by a floor which slopes downward and tapers to a smaller cross section
4) Contains any other recognized safety or health hazard
Permit-required confined space
What is the primary cause of injury or death in confined spaces?
Asphyxiation
Who will decide what work constitutes hot work prior to entry?
A marine chemist, army authorized person, or certified industrial hygienist
An individual who has attended the required Confined Space Entry training either at the US Army Transportation School or National Fire Protection Association (NFPA) taught Competent Person course and is trained to enter a confined space
Authorized entrant
The written authorization to perform operations (such as welding, grinding, cutting, and electrical drilling) that are capable of providing a source of ignition
Hot work permit
An atmosphere that contains 22% or more oxygen by volume
Oxygen-enriched atmosphere
What percent of fatalities in confined spaces are untrained rescuers?
60%
What is the process of ensuring that space remains free from release of energy or other hazards while the space is open for entry operations?
Isolation
Any atmosphere that poses an immediate threat to life or that is likely to result in acute or immediate severe health effects
Immediately Dangerous to Life or Health (IDLH)
How often should testing occur?
Prior to daily use, or at least once per month
Any space, other than a confined space, which is enclosed by bulkheads and overheads
Enclosed space
The command’s overall program for controlling, and, where appropriate, for protecting personnel from permit space hazards and for regulating personnel entry into permit spaces
Permit-required confined space program
Hot work will not be accomplished in or near spaces containing more than ___% of LEL.
10
Step 1 of Evaluating Confined Space Hazards
A confined space must meet the following atmospheric criteria prior to entry:
1) Percent of oxygen not below 19.5% or above 22%
2) Percent of LEL not above 10%
3) Parts per million of carbon monoxide not above 35 parts per million (PPM)
4) Other atmospheric hazards not above the published permissible exposure limit (PEL)
An atmosphere presenting a potential for death, disablement, injury, or acute illness from one of more of the following causes:
1) A flammable gas, vapor, or mist in excess of 10% of its lower explosive limit (LEL)
2) An oxygen-deficient atmosphere containing less than 19.5% oxygen by volume or an oxygen-enriched atmosphere containing more than 22% oxygen by volume
3) Airborne combustible dust at a concentration that meets or exceeds its LEL (airborne combustible dust which obscure vision at five feet or less)
4) Any other atmospheric condition that is immediately dangerous to life or health
Hazardous atmosphere
Step 2 of Evaluating Confined Space Hazards
Visual inspection of the space prior to entry should identity other hazards that may exist
..
Placing locks and tags on energy isolating devices to prevent the system from being re-energized while work is still being performed by personnel
Lockout-tagout
Spaces bordering a subject space in all directions, including all points of contact, corners, diagonals, decks, tank tops, and bulkheads
Adjacent spaces
The process by which the hazards, that may confront entrants of a permit space, are identified and evaluated
Testing
Any action resulting in any part of an individual’s body breaking the plane of any opening of the confined space, and includes any work activities inside the confined space
Entry
How long is a copy of a permit required to be maintained following an entry?
3 months
What is the primary means of eliminating atmospheric hazards?
Ventilation
How often should compressed cylinders be visually and hydrostatically inspected?
Visually inspected monthly, and hydrostatically tested ever 12 years
What is the optimum oxygen level?
20.8%
An atmosphere having an oxygen concentration of less than 19.5% by volume
Oxygen-deficient atmosphere
Any condition in a permit space that is not allowed by the permit during the period when entry is authorized
Prohibited condition
