Which component stores overflow from storage tanks in the fuel oil system?

Which component stores overflow from storage tanks in the fuel oil system?

• A. Strainer
• B. Sump
• C. Cooler
• D. Expansion Tank

Answer: (D)

Handling extra liquid volume from storage tanks requires a vessel that can absorb the additional amount without causing pressure spikes. An expansion tank serves this purpose by providing space for the fuel to expand or overflow, helping to maintain stable system pressure and prevent overfilling or pump cavitation. A sump is more about collecting oil that leaks or drains to a low point, a strainer filters debris before the fuel enters the pump, and a cooler lowers fuel temperature; none of these primarily store overflow from storage tanks.

Handling extra liquid volume from storage tanks requires a vessel that can absorb the additional amount without causing pressure spikes. An expansion tank serves this purpose by providing space for the fuel to expand or overflow, helping to maintain stable system pressure and prevent overfilling or pump cavitation. A sump is more about collecting oil that leaks or drains to a low point, a strainer filters debris before the fuel enters the pump, and a cooler lowers fuel temperature; none of these primarily store overflow from storage tanks.