Which Tab of the QRH 2 is titled SMOKE?

The correct choice is Tab 3, as this tab is specifically designated for smoke-related procedures within the Quick Reference Handbook (QRH) of the Dassault Falcon 7X. Each tab in the QRH is organized to streamline access to critical emergency information. By having smoke procedures consolidated in one tab, pilots can quickly reference valuable protocols during a critical situation where smoke or fire is present in the cabin or other areas of the aircraft. This contributes to safety and efficacy in emergency responses.

The other tabs are organized for different categories of emergencies or operational procedures, which means they would not contain the specific content related to smoke procedures. Knowing the layout and content of the QRH is essential for quick decision-making during flight operations.