Excavator Operator Certification Exam Prep · Question
Which of the following is a primary purpose of regularly lubricating an excavator's pivot points and moving parts with grease?
The primary purpose of regular greasing is to reduce friction between moving metal components, which minimizes wear, and to provide a protective barrier against
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Question: Which of the following is a primary purpose of regularly lubricating an excavator's pivot points and moving parts with grease?
Answer options:
- To increase the speed of hydraulic cylinder extension. ✅ To prevent corrosion and reduce friction.
- To improve the machine's fuel efficiency.
- To adjust the hydraulic pressure settings.
Correct answer: To prevent corrosion and reduce friction.
Explanation: The primary purpose of regular greasing is to reduce friction between moving metal components, which minimizes wear, and to provide a protective barrier against moisture and contaminants, thereby preventing corrosion. This extends the service life of pins, bushings, and other mechanical parts. It does not directly affect hydraulic speed, fuel efficiency, or pressure settings.
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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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