🔍 Key Concepts
• Flash point ranges that define Grades A, B, C, D, and E in 46 CFR for flammable/combustible liquids
• The difference between flammable liquids (lower flash points) and combustible liquids (higher flash points)
• Where a flash point of 90°F falls within those regulatory ranges
💭 Think About
• First, recall which grades are associated with the lowest and highest flash points, then place the grades in order from most volatile to least volatile
• Decide whether 90°F is considered flammable or combustible under the marine regulations you studied, then match that category to the correct grade range
• Compare 90°F to the boundary values in the grade definitions (e.g., just above 80°F, 110°F, 150°F, etc.) and see which bracket it fits into
✅ Before You Answer
• Be sure you know the exact flash point boundaries (in °F) for each grade A–E before answering
• Double‑check that the question specifies a combustible liquid, not flammable, and use the correct part of the table
• Confirm whether a grade’s range is defined as “below,” “above,” or “between” specific temperatures so you place 90°F in the correct bracket