CWLP Warehouse Safety & Hazardous Materials Handling 3 — Questions and Answers
Question 1: Under DOT hazmat regulations, which shipping paper must accompany a highway shipment of hazardous materials?
- Bill of lading with hazardous materials description (Correct answer)
- MSDS for each material
- Emergency Response Guidebook only
- SDS and packing list
Correct answer: Bill of lading with hazardous materials description
DOT requires a shipping paper (typically a bill of lading) that includes the proper shipping name, hazard class, ID number, and packing group.
Question 2: What is the primary purpose of a 'lockout/tagout' (LOTO) procedure in a warehouse environment?
- To secure storage areas against theft
- To prevent accidental equipment energization during maintenance (Correct answer)
- To restrict access to hazmat storage zones
- To control inventory of controlled substances
Correct answer: To prevent accidental equipment energization during maintenance
LOTO procedures (29 CFR 1910.147) prevent equipment from being accidentally energized while workers perform maintenance or repairs.
Question 3: A warehouse stores both corrosives and flammables. According to compatibility guidelines, these two classes should be:
- Stored together in a ventilated area
- Separated by at least one aisle
- Segregated and stored in separate areas (Correct answer)
- Combined only if quantities are below threshold limits
Correct answer: Segregated and stored in separate areas
Corrosives and flammables are incompatible and must be segregated in separate storage areas to prevent dangerous reactions.
Question 4: Which DOT hazard class label is REQUIRED on a package containing a substance with a flash point below 60°C (140°F)?
- Class 3 – Flammable Liquid (Correct answer)
- Class 4 – Flammable Solid
- Class 2 – Flammable Gas
- Class 8 – Corrosive
Correct answer: Class 3 – Flammable Liquid
Liquids with a flash point below 60°C are classified as Class 3 Flammable Liquids under DOT hazmat regulations.
Question 5: In a warehouse using propane-powered forklifts, what ventilation requirement applies to the storage area for propane cylinders?
- Positive pressure ventilation with HEPA filters
- Natural or mechanical ventilation preventing accumulation above 25% LEL (Correct answer)
- Sealed room with explosion-proof lighting
- No special ventilation required if cylinders are upright
Correct answer: Natural or mechanical ventilation preventing accumulation above 25% LEL
Propane storage areas must be ventilated to prevent gas accumulation above 25% of the lower explosive limit (LEL).
Question 6: What information is found in SDS Section 14?
- Stability and reactivity data
- Transport information including DOT, IATA, and IMDG classifications (Correct answer)
- Disposal considerations
- Toxicological information
Correct answer: Transport information including DOT, IATA, and IMDG classifications
SDS Section 14 covers Transport Information, including proper shipping names, hazard classes, and packing groups across transport modes.
Question 7: When a hazardous material spill occurs in a warehouse, the LAST step in the emergency response sequence should be:
- Notify emergency services
- Document the incident and review procedures (Correct answer)
- Don appropriate PPE
- Contain the spill with absorbent material
Correct answer: Document the incident and review procedures
After the spill is controlled and the scene is safe, documentation and procedure review are the final steps to prevent recurrence.
CWLP Warehouse Safety & Hazardous Materials Handling 3
Under DOT hazmat regulations, which shipping paper must accompany a highway shipment of hazardous materials?