A precharged bladder-type accumulator used in a hydraulic system, can be potentially dangerous if __________.

Correct Answer: Option D — the charging valve stem breaks while at normal working pressure

Charging valve stems are critical pressure boundaries. If a stem breaks while the accumulator is pressurized, the high-pressure gas can be released violently, potentially ejecting the valve assembly as a projectile. Always verify the accumulator is fully depressurized before performing any maintenance on the charging valve.