Air vessel in a reciprocating pump isAFitted in delivery lineBFitted before the pumpCFitted outside the systemDNot fittedAnswer: A. Fitted in delivery line Read Explanation: An air vessel is a chamber that is used in reciprocating pumps to smooth out the flow of fluid and reduce pulsations. It is typically fitted in the delivery line of the pump, between the pump and the customer's system.Read more in App