Which device requires two separate steps to activate a manual fire alarm initiation switch?

Which device requires two separate steps to activate a manual fire alarm initiation switch?

• A. Tamper-resistant sender
• B. Two-tier activation switch
• C. Double-action pull-station
• D. Two-stage patrol box

Answer: (C)

The key idea is that some manual fire alarm initiations are built to require two actions to prevent accidental alarms. A double-action pull-station is designed so you must perform two separate steps to trigger the alarm—such as lifting a protective cover and then pulling the handle. This extra step ensures the action is deliberate and reduces false alarms in busy or critical environments. The other options don’t center on two deliberate motions to initiate the alarm: a tamper-resistant sender is about preventing false signals due to tampering; a two-tier activation switch implies multiple actions but isn’t the standard manual activation device with a built-in two-step requirement; and a two-stage patrol box is used for security patrol reporting rather than immediate manual alarm initiation.

The key idea is that some manual fire alarm initiations are built to require two actions to prevent accidental alarms. A double-action pull-station is designed so you must perform two separate steps to trigger the alarm—such as lifting a protective cover and then pulling the handle. This extra step ensures the action is deliberate and reduces false alarms in busy or critical environments. The other options don’t center on two deliberate motions to initiate the alarm: a tamper-resistant sender is about preventing false signals due to tampering; a two-tier activation switch implies multiple actions but isn’t the standard manual activation device with a built-in two-step requirement; and a two-stage patrol box is used for security patrol reporting rather than immediate manual alarm initiation.