🔍 Key Concepts

• Operation of continuous-type foam generators on ships • Relationship between water temperature, pressure, and foam expansion • Manufacturer’s technical limits (water pressure, mixing ratios, foam yield)

💭 Think About

• Think about which factor most realistically affects how quickly foam is produced in a mechanical/continuous system: is it water type, water temperature, or water pressure? • Consider whether using seawater instead of fresh water is normally acceptable with shipboard foam systems. • Ask yourself if the numbers given (like gallons of foam per pound of powder or max pressure) sound like fixed design data, or more like distractors that are too specific for a general exam question.

✅ Before You Answer

• Verify whether seawater is generally allowed in marine foam systems or if only fresh water is permitted. • Consider how temperature affects physical/chemical processes in general: does colder water usually speed up or slow down reactions and mechanical expansion? • Ask if an exact value like 800 gallons per pound or a precise limit like 50 psi is something that would be standard across all generators, or if those values are more likely to vary by model.