🔍 Key Concepts
• Look closely at how dampers work in ventilation ducts – they usually involve airflow being blocked or shut off.
• Compare symbols 32, 33, 34, and 53 and notice which ones clearly relate to vents or ductwork, not sprinklers, valves, or boundaries.
• On fire plans, a fire damper symbol often shows a device that can close inside a duct or opening to stop smoke and flames from spreading.
💭 Think About
• Which of the four numbered symbols looks like something located inside a duct or opening rather than on a bulkhead or deck?
• Do any of the options show a valve-like symbol, and if so, is it more likely to be a liquid valve in a pipe or a damper in an air duct?
• Consider which of the four is already used elsewhere on the sheet for isolation valves or other fittings; which one is left that best fits a damper in ventilation?.
✅ Before You Answer
• Verify which option is drawn on a line representing a duct or opening, not on a tank, hose, or boundary.
• Confirm that the symbol you pick is not labeled for sprinklers, hydrants, or extinguishers elsewhere on the sheet.
• Make sure the symbol you choose could logically represent something that closes to stop airflow in case of fire.