What is the minimum height for lettering on an emergency fuel shutoff sign to ensure clear visibility?

• A. 2 inches
• B. 4 inches
• C. 6 inches
• D. 8 inches

Answer: (B)

The recommended minimum height for lettering on an emergency fuel shutoff sign is 4 inches to ensure clear visibility. The choice of this size takes into account various factors, including the distance from which the sign needs to be read and the potential for low visibility conditions in emergencies, such as smoke or darkness. Emergency signs must be easily recognizable and legible to ensure prompt response and action, particularly in high-stress scenarios where every second counts. The 4-inch height is a balance between being easily readable without being excessively large, thereby ensuring that it can fit into available signage spaces effectively and still attract attention during an emergency.