Ullages are measured from _________

Question 1 of 270705eccefa5bacbc34ba4d4879a

Ullages are measured from __________.

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Question 1 of 27070

Q

Ullages are measured from __________.

🔍 Key Concepts

• Ullage in cargo tank measurement is the empty space in a tank above the liquid cargo • Ullage is measured vertically from a fixed reference point down to the liquid surface • Tank gauging reference points (datum points, bushings, or marks) are designed to give consistent vertical measurements

💭 Think About

• Think about which reference point a deck officer or tankerman actually puts the ullage tape or electronic gauge on before lowering it toward the liquid surface • Ask yourself: is ullage measured from inside the tank at the very top, from a special fitting, or from a marked reference used in the tank calibration tables? • Consider how the same reading can be repeated on different days and by different people—what fixed point would make that possible?

✅ Before You Answer

• Identify which choice represents a fixed, repeatable measuring reference used in tank calibration tables • Recall that ullage is a vertical distance from the reference point down to the liquid surface, not the cargo depth • Check which option aligns with how a sounding/ullage tape is actually positioned in real shipboard practice