🔍 Key Concepts

• Plug valve design and operation in hydraulic systems • Difference between two-position (on/off) control and variable (throttling) control • Where you want full, quick open or close vs fine flow adjustment

💭 Think About

• Is a plug valve better for precise, gradual flow adjustment, or for simply selecting/opening/closing flow paths? • Think about the internal shape of a plug valve: does it lend itself to throttling at many positions, or to a small number of definite positions? • In a hydraulic circuit, where would you want a simple, positive shutoff/route selector instead of a finely adjustable control?

✅ Before You Answer

• Check which option describes simple on/off or selection between flow paths rather than fine adjustment • Eliminate any choice that clearly implies continuous, precise throttling of flow • Match the term in the choices that best fits a valve that is usually either fully open, fully closed, or in one of a few distinct positions