Question 17

The Correct Answer is D **Explanation for Option D (Innage):** Innage is the industry term used specifically to describe the measurement of the depth of the liquid (the product) contained within a tank, measured from the bottom of the tank (or the dipping point) up to the surface level of the liquid. Therefore, it directly describes the depth of the product. **Why the other options are incorrect:** * **A) Thievage:** Thievage (often referred to as water-finding paste or simply "finding") is a term related to the measurement of water or sediment at the bottom of an oil tank. It doesn't describe the depth of the product itself, but rather the process or result of measuring water contamination. * **B) Ullage:** Ullage (sometimes called outage) is the measurement of the empty space or headspace in a tank, measured from the tank's reference point (usually the dipping hatch) down to the surface of the liquid. It measures the absence of product, not its depth. * **C) Outage:** Outage is a synonym for Ullage. It describes the empty volume or space above the liquid level, measured from the top reference point of the tank down to the product surface.