| 1. |
DuPont management, following their Management of Change process, approved a design for the rupture disc alarm system that lacked sufficient reliability to advice operators of a flammable methyl chloride release. This resulted in methyl chloride incident. |
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True |
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False |
| 2. |
____________ introduced the "zero incidents" goal in the early 1900s as a management directive to drive injury rates down to zero through continuous improvement of safety practices. |
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EPA |
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OSHA |
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DuPont |
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All of the above |
| 3. |
Methyl chloride is a _____________ gas. |
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Blue colored |
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Yellow colored |
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Colorless |
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It is not a gas |
| 4. |
___________ are overpressure protection devices used in processes operating above ambient pressure and are intended to prevent equipment damage, including catastrophic failure. |
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Valves |
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Orifice meters |
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Detectors |
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Rupture discs |
| 5. |
What are the root causes for methyl chloride incident at DuPont? |
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DuPont’s MOC process approved a design for the rupture disc alarm system that lacked sufficient reliability for minimizing the release of methyl chloride. |
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DuPont did not resolve the "nuisance alarm" condition in a timely manner despite various safety reviews. |
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Operators became desensitized to the rupture disc burst alarm |
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Both A and B |
| 6. |
Phosgene, in liquid and gaseous forms, is __________ and highly toxic and has a characteristic odor of freshly cut hay or grass. |
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Light blue in color |
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Yellow colored |
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Green colored |
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Colorless |
| 7. |
Which one of the following method can create Hot spots? |
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Electric tracing |
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Steam tracing |
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Bubble tracing |
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None of the above |
| 8. |
The DuPont SOPs for the change-out frequency of the nitrogen and phosgene hoses directs replacement every _________ days. |
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10 |
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30 |
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60 |
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90 |
| 9. |
Which of the following is not a PPE? |
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Hard hat |
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Safety glasses |
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Yellow head band |
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All of the above |
| 10. |
Phosgene indicator badges change color when exposed to phosgene and the color indicates the concentration __________ after exposure. |
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1 minute |
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3 minutes |
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5 minutes |
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10 minutes |
| 11. |
DuPont estimates that about ________ pounds of phosgene were released to the atmosphere when the hose failed. |
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2 |
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4 |
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6 |
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7 |
| 12. |
Phosgene permeation through ________ had resulted in leaks at Belle in the past; however, the PHA team did not consider this hazard for the phosgene cylinder hoses. |
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PTFE |
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PPE |
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POFE |
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PPPE |
| 13. |
The phosgene shed at Belle in very large amounts is because DuPont relies on ____________ to decrease the concentrations of Phosgene. |
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Natural Ventilation |
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Artificial Ventilation attached to the storage |
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Manual control of the gas |
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None of the above |
| 14. |
PTFE-lined pigtails are suitable for use with poisonous, toxic, or pyrophoric gases because permeation of gas through the PTFE wall creates a potential hazard only at some conditions. |
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True |
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False |
| 15. |
Though the overall proportion of new to departing employees has remained consistent, a significant reduction of employees with an average of 30 years of experience working on the Belle site contributes to a loss of institutional and plant-specific knowledge. |
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True |
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False |
| 16. |
Which of the following are the root causes for the DuPont incidents? |
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A maintenance software program change was not documented or reviewed in accordance with the MOC process. |
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DuPont did not provide a back-up method to ensure timely change-out of the hoses. |
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DuPont relied on a maintenance software program to initiate the automatic change-out of phosgene hoses at the prescribed interval. |
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All of the above |
| 17. |
The Belle plant analyzer in the phosgene shed has no audible alarm to alert personnel in the area; instead, Belle plant procedures require the board operator to notify personnel of the release and only operators at the phosgene shed can activate the switch for the warning light. |
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True |
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False |
| 18. |
About 8 months after the series of incidents at the Belle plant triggered this investigation, another significant release of _________ occurred. |
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CO |
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Diethylene |
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Methanol |
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Tetranapthalene |
| 19. |
OSHA is authorized under the Occupational Safety and Health Act of 1970 to inspect workplaces to ensure that employers are providing a safe and healthy work environment by complying with OSHA standards. |
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True |
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False |
| 20. |
On January 20, 2011, the _____________ investigation resulted in a recommendation being issued to the Kanawha-Charleston Health Department to establish a Hazardous Chemical Release Prevention Program, whose objective is to enhance the prevention of accidental releases of highly hazardous chemicals and optimize responses if they occur. |
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CSB Bayer Crop Science |
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OSHA |
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PEA |
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None of the above |
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