| 1. |
What does EPA stands for?
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Environmental Protection Agency |
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Engineering Protection Agency |
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Environmental Protection Association |
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None of the above |
| 2. |
At the time of the explosion, Napp was performing a blending operation to produce ACR 9031, a gold precipitating agent (GPA) under a toll blending arrangement with Technic Inc. (Technic) of Cranston RI.
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True |
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False |
| 3. |
The chemicals involved in the explosion were sodium hydrosulfite, aluminum powder, potassium carbonate, and benzaldehyde.
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True |
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False |
| 4. |
Sodium hydrosulfite (sodium dithionite), Na2S2O4, is a whitish, crystalline solid, with moderately strong reducing properties. It is principally used in dying and bleaching operations. |
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True |
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False |
| 5. |
NFPA stands for National Fire Projection Association |
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True |
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False |
| 6. |
Sodium hydrosulfite is unstable in the presence of water, heat or humid air, giving off sulfur dioxide gas and other sulfur products in an exothermic reaction.
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True |
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False |
| 7. |
Aluminum powder has a number of uses related to its flammability and explosivity when dispersed in air, including use in explosives, propellants, and pyrotechnics.
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True |
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False |
| 8. |
Potassium carbonate is usually in the form of white crystalline granules. Because of its alkaline chemical nature, it is commonly used to raise the pH of mixtures and solutions.
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True |
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False
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| 9. |
What does OSHA stand for? |
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Occupational Safety Health Association |
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Occupational Safety Health Agency |
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Occupational and Safety Health Administration |
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None of the above |
| 10. |
The reports of unusual odors in the blending room and building, bubbling and smoking noted on the surface of the material in the blender, and pressure buildup in the blender all suggest that the explosion and fire were triggered by an unwanted and uncontrolled chemical reaction occurring in the blender. |
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True |
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False |
| 11. |
Water was used to clean the inside of the blender before it was used. If water remained in the blender, it would have reacted with the raw materials. |
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True |
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False |
| 12. |
Atmospheric humidity is known to react with sodium hydrosulfite and aluminum. Interviews revealed that a nitrogen blanket was placed on the contents of the blender when the blender was opened to the atmosphere, minimizing the effects of atmospheric moisture on the feed materials. |
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True |
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False |
| 13. |
Moisture present in any of the raw materials could not have been sufficient to initiate a reaction.
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True |
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False |
| 14. |
The heat generated by the friction of the blades of the intensifier bar running through the dry chemicals in the blender may have been sufficient to initiate or contribute to the thermal decomposition of the sodium hydrosulfite.
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True |
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False |
| 15. |
Before handling any substance, facilities should ensure that all chemical and process hazards and the consequences and deviations associated with the chemical and process hazards are completely understood, evaluated, documented, and appropriately addressed through preventive measures.
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True |
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False |
| 16. |
CCPS stand for Center for Chemical Process Society
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True |
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False |
| 17. |
All facilities should ensure that equipment manufacturers’ recommendations are followed and that equipment is installed, operated, and maintained as designed.
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True |
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False |
| 18. |
Anhydrous sodium hydrosulfite has a tendency to decompose spontaneously as in the following equation (Equation 4), forming sodium thiosulfate and sodium sulfite and releasing sulfur dioxide. |
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True |
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False |
| 19. |
Aluminum is a strongly electropositive metal and is very reactive, burning rapidly in air when strongly heated. |
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True |
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False |
| 20. |
What does ARC stand for? |
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Accelerated Rate Calorimetry |
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American Rate Calorimetry |
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American Rural Calorimetry |
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None of the above |
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