An ullage reading is the distance from a given point at the __________.
β’ Ullage is the empty space in a tank above the liquid β’ Difference between a sounding (measuring liquid depth) and an ullage (measuring empty space) β’ Where measurements are usually taken from in a cargo or ballast tank (reference point at the top vs. bottom)
β’ Ask yourself: Does ullage measure how much liquid is in the tank, or how much space is left above the liquid? β’ From what fixed point are ullage measurements normally takenβtop of tank, bottom of tank, or side of tank? β’ Which choice describes a measurement that ends at the surface of the liquid, not the bottom of the tank?
β’ Confirm that ullage relates to the space above the liquid, not the liquid depth itself β’ Ensure the starting point is a fixed reference at the top (such as the top of the tank or sounding tube) β’ Eliminate any option that measures down to the tank bottom rather than to the liquid surface
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