If you attempt to tighten a leaking hydraulic fitting with pressure on the system, you will __________.

Correct Answer: Option C — find that the pressure will prevent the components from being tightened

Attempting to tighten a hydraulic fitting while the system is pressurized is dangerous and ineffective. The internal pressure exerts a force against the sealing surfaces, preventing the fitting from being tightened further. Furthermore, this practice risks sudden seal failure and high-pressure fluid injection injuries to personnel.