Heavy Equipment Operator Certification Exam Prep · Question
A worker is directed to work on a hydraulic excavator. What specific steps beyond electrical lockout must be taken to control stored energy in its hydraulic system?
Controlling stored hydraulic energy involves lowering all attachments to a rest position, relieving hydraulic pressure using manufacturer-specified procedures,
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Question: A worker is directed to work on a hydraulic excavator. What specific steps beyond electrical lockout must be taken to control stored energy in its hydraulic system?
Answer options: ✅ Lowering all attachments to the ground, relieving hydraulic pressure, and cycling hydraulic levers.
- Simply turning off the engine and removing the key.
- Draining all hydraulic fluid from the system.
- Placing warning cones around the machine.
Correct answer: Lowering all attachments to the ground, relieving hydraulic pressure, and cycling hydraulic levers.
Explanation: Controlling stored hydraulic energy involves lowering all attachments to a rest position, relieving hydraulic pressure using manufacturer-specified procedures, and cycling hydraulic levers to ensure complete de-energization, as required by safe heavy equipment work practices and CCOHS guidance.
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