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Examoogle • User • info@examoogle.com • EE-2024-8821
Chapter 1 of 12 • Page 1 of 248🔒 Protected PDF • Watermarked
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In monthly maintenance of storage batteries which activity performed?
Voltages
Cleaning
Terminals
All of these
All of these
Quick Summary: Monthly maintenance of lead-acid storage batteries is critical to ensure their longevity and reliability. This routine involves checking terminal integrity, cleaning the casing to prevent leakage currents, and monitoring cell voltages to identify uneven charging or degradation.
Monthly maintenance of lead-acid storage batteries is critical to ensure their longevity and reliability. This routine involves checking terminal integrity, cleaning the casing to prevent leakage currents, and monitoring cell voltages to identify uneven charging or degradation.
Rins=IleakV — represent insulation resistance check
SOC=Vmax−VminVactual−Vmin×100% — state of charge approximation
Battery maintenance is performed to mitigate common degradation factors: electrolyte evaporation, terminal corrosion due to oxidation, and sulfation. Monitoring terminal voltage allows operators to detect individual cell failure before it compromises the entire battery bank, while physical cleaning ensures high insulation resistance between terminals and the tray.
Checking terminal tightness prevents high-resistance joints and localized overheating.
Cleaning battery tops prevents tracking and inter-terminal short circuits caused by electrolyte accumulation.
Voltage checks identify 'weak' cells that may need equalization charging.
Safety gear (PPE) including goggles and acid-resistant gloves is mandatory during maintenance.
Increases operational life of the battery bank
Prevents sudden power failure in DC systems
Detects early signs of sulfation
Risk of chemical burns or accidental short circuit
Time-consuming for large installations
Substation control power
UPS and Inverter backup systems
Telecom power plants
Monthly maintenance is part of the standard IEEE 450 recommended practice for vented lead-acid batteries.
Cleaning is typically done with a weak soda bicarbonate solution to neutralize any spilled acid.
D is correct — All listed activities (Voltages, Cleaning, and Terminals) are fundamental requirements for the monthly preventative maintenance schedule of storage batteries.
Always ensure the ambient temperature is near 25°C when performing voltage checks, as battery voltage is temperature-dependent.