Which of the following describes the purpose of ventilation in nickel-cadmium battery shops?

• A. To remove hydrogen gas
• B. To maintain a cool temperature
• C. To minimize dust
• D. To control humidity

Answer: (A)

Ventilation in nickel-cadmium battery shops is essential to remove hydrogen gas that is produced during charging. NiCd batteries generate hydrogen as the electrolyte is electrolyzed, and hydrogen is highly flammable, forming explosive mixtures with air at relatively low concentrations. In an enclosed space, hydrogen can accumulate and reach the dangerous flammable range, so proper ventilation dilutes and removes it, reducing the risk of ignition from sparks or heat. While ventilation can also help with heat and airQuality somewhat, the primary purpose here is to prevent hydrogen buildup. Dust control and humidity management are important for general safety and equipment longevity, but they do not address the main hazard associated with charging NiCd batteries as directly as removing hydrogen does.