🔍 Key Concepts

• Relationship between weight of liquid, specific gravity, and volume in a tank • How to use a vessel’s tank capacity (soundings/ullage) table for a specific tank (P‑Tank #4) • Difference between sounding (depth of liquid) and ullage (empty space above liquid)

💭 Think About

• First, think about how you would convert a known weight in long tons of a liquid in a specific tank into a corresponding sounding or ullage using a capacity table. • Ask yourself: once you know how many feet of liquid are in the tank, how do you use the total tank depth to find the ullage? • Consider what would happen to the ullage if more weight (more liquid) were added: would ullage increase or decrease, and which answer choices match that trend for 75.24 LT?

✅ Before You Answer

• Verify the unit consistency: long tons → volume (barrels or cubic feet) → feet of liquid, as shown in the tank table. • Check the P‑Tank #4 capacity table for exactly 75.24 LT (or nearest tabulated value) and note the corresponding sounding or ullage in feet. • Confirm the tank’s total internal height so you can correctly relate liquid depth to remaining space (ullage) at the top.