Excavator Operator Certification Exam Prep · Question
An excavator experiences a sudden, uncontrolled hydraulic line rupture, spraying fluid. What is the correct emergency shutdown procedure?
In an emergency, the priority is to render the machine safe. Lowering the attachment stabilizes the machine, shifting to neutral prevents unexpected movement, a
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Question: An excavator experiences a sudden, uncontrolled hydraulic line rupture, spraying fluid. What is the correct emergency shutdown procedure?
Answer options:
- Apply the parking brake, then slowly turn the ignition key to the 'off' position.
- Engage the emergency stop (E-stop) button, then turn off the ignition and secure loose objects. ✅ Lower the attachment to the ground, shift to neutral, and then press the E-stop.
- Turn off the engine, exit the cab, and then locate the main battery disconnect switch.
Correct answer: Lower the attachment to the ground, shift to neutral, and then press the E-stop.
Explanation: In an emergency, the priority is to render the machine safe. Lowering the attachment stabilizes the machine, shifting to neutral prevents unexpected movement, and then pressing the E-stop quickly shuts down the engine and hydraulics.
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Question explanations
- During a final inspection of an excavator, prior to beginning work, an operator notices significant play in th
- An excavator operator is preparing to dig a trench in cohesive soil. To achieve maximum breakout force, what a
- Which control typically governs the arm (or dipper arm) movement for an excavator?
- What condition might require sloping or shoring of a trench less than 1.2 meters (4 feet) deep?
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