Question 45Electricity & Electronics - QMED
70% to passAfter prior isolation and lock-out/tag-out procedures are performed, which electrical device requires discharging any stored electrical energy before any work may safely begin?
Aresistor bank
Bcapacitor
Cpotential transformer
Dchoke coil
AI Explanation
The correct answer is B) capacitor. Capacitors are devices that can store electrical energy even after the power source has been disconnected. Before any work can safely begin on a capacitor, the stored electrical energy must be discharged to prevent the risk of electric shock or other hazards. This is a critical safety requirement outlined in the US Coast Guard regulations for Captain's License Examinations. The other options (resistor bank, potential transformer, and choke coil) do not inherently store electrical energy in the same way as a capacitor, and therefore do not require the same discharging procedures before work can commence.
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