1910.146
How long after a Confined Space Permit is completed shall it be kept?
Minimum 1 year
Most gases are ___________ compared to "normal air".
Heavier
Maximum allowed length of SAR lines?
300'
When does the initial size-up begin?
At time of dispatch
Leading cause of Confined Space deaths?
Hazardous Atmosphere (specifically asphyxiation)
T/F: An entrant is never allowed to remove their retrieval line
False
What is the last step of the LockOut/TagOut Procedure before making entry?
Verification
Add ________ per foot of tubing for a gas monitor's expected response time.
1-2 seconds per foot
Which phase of a Confined space rescue does "Mode of Operation" fall under?
Phase I: Assessment
What % of Confined Space fatalities are would-be rescuers?
60%
False
Dust obscuring vision of _________ (distance) is considered hazardous.
5'
RFD 4-Gas monitor Oxygen sensor will alarm at:
<19.5 and > 23.5
What does TWA stand for? And what does it mean?
Time Weighted Average. How much an employee is "safely" exposed to for 8 hours a day/40 hours week
What zone is the Attendant located in?
Warm
Who on scene is ultimately responsible for all OSHA Confined Space compliance?
Entry Supervisor
How much of a gas is needed to displace 1% of Oxygen in the air?
5%
Confined Space ventilation fan can produce 1,000 cfm. How long will it take to exchange air 1 time in a 8'x8'x6' vault?
.4 minutes (24 seconds)
How often should you stop and monitor down a vertical shaft?
4'
In industry, how many air exchanges are completed before making entry?
5-7 air exchanges
Requirements for a Permit-Required Confined Space:
-Contains/Potential Hazardous Atmosphere
-Engulfment
-Inwardly sloping walls
-Any other safety hazard
When is LockOut/TagOut required?
During not normal production operations if/when:
-guard is bypassed
-exposed to hazardous point of operation
Scott Air Cart low air alarm will sound at what psi?
500 psi
What does "OATH" stand for?
Ok - 1 tug
Advance - 2 tugs
Take Up - 3 tugs
Help - 4 tugs
1% of total volume of air = _________ PPM
10,000 PPM