Which control ensures the laser cannot operate when the housing is opened?

• A. SYSTEM INTERLOCKS
• B. MASTER SWITCH CONTROL
• C. REMOTE OPERATION
• D. WARNING SYSTEMS

Answer: (A)

Interlocks are safety devices that prevent laser emission whenever the housing or access door is opened. They are wired into a fail-safe safety circuit so that opening the housing breaks the electrical path to the laser drive, automatically disabling emission. This ensures containment of the hazard even if someone tries to operate the unit with the door open.

The other controls don’t provide this automatic containment. A master switch simply turns power on or off, but it doesn’t guarantee that the laser cannot emit if the housing is open. Remote operation concerns where control is located, not the physical enclosure, and warning systems only alert you to a hazard without preventing emission.