During a lockout/tagout procedure, an employee discovers that a machine cannot be fully de-energized due to stored energy in hydraulic accumulators. What additional step is required?
Correct Answer
C) Dissipate or restrain the stored energy
OSHA's lockout/tagout standard requires that stored energy be dissipated or restrained before work begins. Hydraulic accumulators contain stored energy that must be safely released or blocked.
Why This Is the Correct Answer
OSHA's lockout/tagout standard (29 CFR 1910.147) specifically requires that all forms of stored energy be dissipated or restrained before maintenance work begins. Hydraulic accumulators store pressurized fluid that can cause serious injury if released unexpectedly. Simply locking out the main power source is insufficient when stored energy remains in the system. The stored energy must be safely released through proper procedures or mechanically restrained to prevent accidental release.
Why the Other Options Are Wrong
Option A: Proceed with work using extra caution
Proceeding with work using extra caution is completely inadequate and violates OSHA requirements. Stored energy in hydraulic systems can cause catastrophic failure, serious injury, or death regardless of how cautious workers are.
Option B: Use only qualified electricians
While warning signs are important safety measures, they do not eliminate the physical hazard posed by stored energy. Signs alone cannot prevent accidental release of pressurized hydraulic fluid that could cause injury or equipment damage.
Option D: Post additional warning signs
Hydraulic stored energy is not an electrical issue requiring qualified electricians. This is a mechanical/hydraulic hazard that requires proper dissipation or restraint of pressurized fluid, not electrical expertise.
Memory Technique
Think 'SHED': Stored energy must be Safely Handled, Eliminated, or Dissipated. Hydraulic accumulators are like loaded springs - you must safely release the pressure before working on the system.
Reference Hint
OSHA Construction Standards 29 CFR 1926.417 or General Industry Standards 29 CFR 1910.147 - Control of Hazardous Energy (Lockout/Tagout)
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