When the pump acts on both ends of the cylinder, the reciprocating pump is a

When the pump acts on both ends of the cylinder, the reciprocating pump is a

• A. None
• B. Double action
• C. Single action
• D. Triple action

Answer: (B)

Using both ends of the cylinder means the pump delivers fluid on both strokes of the piston, with valves directing flow from each side to the discharge line. This is called a double-acting pump. In a double-acting design, each half-cycle moves fluid toward the discharge, so you get pumping action on both strokes, increasing the overall flow compared with a single-acting pump, which only discharges on one stroke while the other stroke is a suction stroke. Triple action isn’t a standard configuration. So the best answer is double-acting.

Using both ends of the cylinder means the pump delivers fluid on both strokes of the piston, with valves directing flow from each side to the discharge line. This is called a double-acting pump. In a double-acting design, each half-cycle moves fluid toward the discharge, so you get pumping action on both strokes, increasing the overall flow compared with a single-acting pump, which only discharges on one stroke while the other stroke is a suction stroke. Triple action isn’t a standard configuration. So the best answer is double-acting.