What describes a smoke indicator cut?

• A. Small triangle opening large enough to fit the D-handle of rubbish hook into
• B. Large circular hole
• C. Narrow slot near edge
• D. Full-thickness window opening

Answer: (A)

A smoke indicator cut is a small, controlled opening used to observe interior smoke conditions while performing ventilation. The description of a small triangular opening that’s just large enough to accept the D-handle of the rubbish hook captures the purpose and practical shape. The triangle and its limited size let firefighters probe and observe smoke movement, feel air flow, and gather information without creating a large, uncontrolled vent that could worsen the fire or spread smoke. By keeping the opening small, you preserve interior control and minimize unintended draft effects. Larger openings, like a big circular hole or a full-thickness window, would vent too much and compromise safety and control, and a narrow slot near the edge may be too small to provide useful visibility or tool access.