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Accident - 7 Key Lessons to Prevent Worker Death During Hot Work in and Around Tanks


Quiz Questions

1.Hot work is defined as "work involving burning, welding, or a similar operation that is capable of initiating fires or explosions". Therefore cutting, brazing, grinding, and soldering etc. can be considered as Hot work.
True
False
2. Which one of the following is not a Seven key lessons from recent hot work accidents?
Analyze the Hazards
Train Thoroughly
Clean the work area
Test the Area
3. Avoid hot work of any kind in areas handling, processing or storing flammable liquids or gases.
True
False
4. The CSB has identified over _____ fatalities since 1990 due to explosions and fires from hot work activities on tanks.
50
60
70
80
5. Flammable gas and vapor concentrations are generally determined using a portable combustible gas detector, also called a _________ meter.
HEL
LEL
LLL
BEL
6. The incident at the EMC used oil facility in Florida is caused due to not performing combustible gas monitoring.
True
False
7.Three workers were killed in an explosion at the Packaging Corporation of America (PCA) fiberboard manufacturing facility while they were welding on a temporary metal clamp to stabilize a damaged flange connection. The CSB analysis of the tank contents determined that anaerobic bacteria had multiplied inside the tank and water recycle system over time, feeding on organic waste material. The bacteria likely produced _________, a highly flammable gas, which ignited during the welding work.
Hydrogen
Ammonia
Carbon Dioxide
Neon
8. Two workers were killed and another critically injured in an explosion involving a ___________ storage tank at a municipal wastewater treatment facility in Daytona Beach, Florida.
Ethyl
Methanol
Ether
Diesel
9. While the OSHA standard prohibits hot work in an explosive atmosphere, it does not explicitly require the use of a combustible gas detector.
True
False
10. A massive explosion destroyed a large storage tank containing a mixture of _____________ and flammable hydrocarbons at the Motiva Enterprises Delaware City Refinery.
Hydrochloric acid
Sulfuric acid
Chloric acid
Sulfites