Which statement best describes hydrostatic testing?

Which statement best describes hydrostatic testing?

• A. It verifies electrical insulation
• B. It verifies structural integrity under pressure
• C. It measures color coding
• D. It checks lubrication status

Answer: (B)

Hydrostatic testing checks a pressurized container’s ability to withstand internal pressure without leaking or deforming. The cylinder is filled with water and pressurized to a defined test level, then inspected for leaks, bulges, or cracks. Because water is incompressible, any weakness in the wall shows up under the test pressure, proving the vessel’s structural integrity for continued service until the next required test. It isn’t used to verify electrical insulation, color coding, or lubrication status, which relate to other aspects of equipment rather than its strength under pressure.

Hydrostatic testing checks a pressurized container’s ability to withstand internal pressure without leaking or deforming. The cylinder is filled with water and pressurized to a defined test level, then inspected for leaks, bulges, or cracks. Because water is incompressible, any weakness in the wall shows up under the test pressure, proving the vessel’s structural integrity for continued service until the next required test. It isn’t used to verify electrical insulation, color coding, or lubrication status, which relate to other aspects of equipment rather than its strength under pressure.