Where does the red strobe light and bell ring during a danger condition?

• A. Red strobe light in the CHT pump room flashes; a bell rings in the CHT pump room and outside.
• B. Amber strobe light activates.
• C. Red strobe light turns off.
• D. Only a bell rings outside.

Answer: (A)

When danger is present, alarms use both a visual signal and an audible signal to ensure everyone nearby notices quickly. In this scenario, the red strobe light in the CHT pump room flashes to warn of immediate danger, and a bell rings in the CHT pump room as well as outside to wake people in adjacent areas and those who might not see the light. The red light clearly communicates a high-risk condition, while the bell provides an audible alert that reaches people who may be away from the room or in noisy spaces, prompting them to stop work and take appropriate action. Amber signals would indicate caution rather than immediate danger, turning off the red light would remove the critical warning, and ringing only outside could miss those inside the pump room.