🔍 Key Concepts

• Function of a reciprocating feed pump and how its motion affects flow in the discharge line • Purpose of devices used to smooth out pulsations or water hammer in piping systems • Difference between devices that control pressure, those that control flow/level, and those that absorb volume changes

💭 Think About

• Which component is specifically intended to smooth an unsteady, pulsating discharge flow from a reciprocating pump, rather than to protect against overpressure? • Think about how trapped compressible fluid (like air) behaves when pressure fluctuates in a pipe compared to incompressible water. • For each choice, ask: does this device mainly relieve excess pressure, control water level/flow rate, or cushion/absorb pulsations?

✅ Before You Answer

• Identify which option is designed to protect piping and equipment from overpressure—that is not the primary goal in this question. • Identify which option is mainly used to automatically control and maintain feedwater flow/boiler level, not to stop pulsations in a discharge line. • Focus on the option that uses a cushioning effect to absorb and smooth out the pulsating flow from the pump.