Question 299General Subjects - QMED

The correct answer is B) Two sets of valves, one set each for suction and discharge located in the water chest. This arrangement permits the reciprocating pump liquid piston to take suction from the suction chamber and simultaneously discharge through the discharge chamber during the up and down strokes. The water chest, which is a separate chamber from the liquid cylinder, contains the suction and discharge valves that control the flow of liquid into and out of the pump. This allows the piston to draw in liquid on the downstroke and expel it on the upstroke without interfering with the valve operation. The other answer choices do not accurately describe this valve arrangement. Option A uses relief valves which would not control the suction and discharge. Options C and D describe valve arrangements within the liquid cylinder itself, which would not allow the simultaneous suction and discharge required.