Aboveground vertical cylindrical tanks storing combustible liquids shall not exceed how many feet?

Aboveground vertical cylindrical tanks storing combustible liquids shall not exceed how many feet?

• A. 36
• B. 48
• C. 60
• D. 72

Answer: (B)

The main idea being tested is the safety-driven height limit for aboveground vertical cylindrical tanks that store combustible liquids. Taller tanks store more liquid and have more internal energy, so in a fire they present greater challenges: heat can weaken the shell and roof, expansion of vapors increases hazard, and firefighting access and cooling become harder. Setting a maximum height keeps these tanks within a size range that can be effectively cooled and controlled by standard firefighting methods, while also fitting with spacing, diking, and structural considerations. That balance helps reduce the potential severity of a incident and maintains safer operation of the facility. If a tank were allowed to be much taller, it would demand different design, protection, and response strategies; if it were much shorter, it would unnecessarily limit storage capacity.

The main idea being tested is the safety-driven height limit for aboveground vertical cylindrical tanks that store combustible liquids. Taller tanks store more liquid and have more internal energy, so in a fire they present greater challenges: heat can weaken the shell and roof, expansion of vapors increases hazard, and firefighting access and cooling become harder. Setting a maximum height keeps these tanks within a size range that can be effectively cooled and controlled by standard firefighting methods, while also fitting with spacing, diking, and structural considerations. That balance helps reduce the potential severity of a incident and maintains safer operation of the facility. If a tank were allowed to be much taller, it would demand different design, protection, and response strategies; if it were much shorter, it would unnecessarily limit storage capacity.