In order for the hydraulic pump installed in a constant flow system to maintain adequate flow, the pump suction should __________.

Correct Answer: Option C — be arranged to develop a maximum vacuum of approximately 10" of mercury

Hydraulic systems require controlled suction conditions to prevent cavitation and air entrainment. Limiting vacuum to approximately 10 inches of mercury ensures the pump maintains a positive net positive suction head (NPSH), preventing vapor bubble formation that causes mechanical damage and flow instability within the hydraulic circuit.