🔍 Key Concepts

• How the Coast Guard and OSHA describe areas where flammable gases or vapors may be present • The standard engineering term used in electrical/fire protection codes for areas with explosive atmospheres • The specific wording commonly used on MODU electrical drawings and hazardous area plans

💭 Think About

• Look at which answer choice sounds like a formal technical term that would appear in regulations and standards, not just everyday language • Think about NEC/API terminology for areas where special electrical equipment is required because of flammable atmospheres • Ask yourself which term would most likely be broken down further into Zones or Divisions (e.g., Zone 1, Division 1, etc.)

✅ Before You Answer

• Identify which option is commonly linked to special electrical equipment requirements in flammable atmospheres • Eliminate any answers that sound informal or unlikely to appear in a regulation or classification drawing • Consider which term you have seen in connection with hazardous area classification on MODUs and offshore facilities