After prior isolation and lockout/tagout procedures are performed, which electrical device requires discharging any stored electrical energy before any work may safely begin?

Correct Answer: Option B — capacitor

Capacitors store electrical energy in an electrostatic field and retain a lethal charge long after the primary circuit is isolated and locked out. Safe work practices under 46 CFR Subchapter J require discharging this stored energy to ground before performing any maintenance or inspection.