🔍 Key Concepts

• Flash point definition for flammable vs. combustible liquids • How low flash point relates to how easily vapors can ignite • Regulatory cutoff temperature used in U.S. maritime/OSHA standards for flammable liquids

💭 Think About

• Which of these temperatures represents a liquid that would give off ignitable vapors at typical room temperature? • Think about the difference between a liquid that is dangerous even in cool conditions versus one that needs to be fairly warm before it gives off enough vapor to ignite. • Compare these choices to common room temperatures on a ship or in a machinery space—what needs the lowest temperature to start giving off flammable vapors?

✅ Before You Answer

• Identify which option is closest to the commonly used flash point limit that separates flammable from combustible liquids in safety regulations. • Make sure you are thinking about flash point (vapor ignition), not boiling point or melting point. • Ask yourself: at which of these temperatures would a liquid be most hazardous because it can form an ignitable vapor-air mixture under normal conditions? The correct choice is the lowest regulatory cutoff used for flammable liquids.