🔍 Key Concepts

• Purpose and location of vent pipes on a vented tank (what are they trying to remove or equalize?) • Purpose and physical reach of sounding tubes (how do you actually measure the liquid level in the tank?) • Difference between something that stops at the top of the tank versus something that extends nearly to the bottom

💭 Think About

• Think about how you would safely measure the depth of liquid in a tank with a tape or sounding rod. Which tube design would make this possible? • Consider how air or vapor gets out of the tank when the liquid level rises. Does that pipe need to go down near the bottom, or only connect at the top? • Visualize a simple vented tank: which fitting is mainly for measurement, and which is mainly for pressure equalization/venting?

✅ Before You Answer

• Be clear on which component must reach almost to the tank bottom to serve its function. • Confirm which component simply connects to an opening at the top of the tank to let gases escape or enter. • Eliminate any choices where both pipes do the same thing (same length/location), since venting and sounding have different physical requirements.