Which statement best describes the purpose of interlocks in a flame effects system?

• A. To adjust flame height automatically.
• B. To log performance metrics only.
• C. To ensure safety by preventing ignition when conditions are not safe.
• D. To coordinate cues with the lighting desk.

Answer: (C)

Interlocks act as a safety gate for a flame effects system. They require that all critical safety conditions are verified before ignition can occur—things like the gas supply being ready and controlled, the purge or ventilation completing properly, the ignition source and flame detector being ready, and no emergency stop or fault present. If any condition isn’t safe, the interlock blocks ignition or shuts the system down, preventing a flame from starting in an unsafe situation. This is the primary purpose: to prevent ignition when conditions could cause a dangerous event, protecting performers, crew, and equipment.

They aren’t primarily about adjusting flame height, logging performance metrics, or coordinating cues with the lighting desk—those tasks are handled by other parts of the system.