Excavator Operator Certification Exam Prep · Question
When operating an excavator, the 'boom-up' function feels sluggish and less responsive than other hydraulic functions, even though the engine RPM is high. What could be a potential cause specific to the boom's hydraulic circuit?
If only the 'boom-up' function is sluggish, a worn or damaged seal in the boom cylinder is a likely culprit, as it would cause internal leakage (bypassing) and
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Question: When operating an excavator, the 'boom-up' function feels sluggish and less responsive than other hydraulic functions, even though the engine RPM is high. What could be a potential cause specific to the boom's hydraulic circuit?
Answer options: ✅ A worn or damaged boom cylinder seal allowing internal leakage.
- An excessively tight track tension causing increased friction.
- A low fuel level in the main diesel tank.
- The cabin's air conditioning system drawing too much power.
Correct answer: A worn or damaged boom cylinder seal allowing internal leakage.
Explanation: If only the 'boom-up' function is sluggish, a worn or damaged seal in the boom cylinder is a likely culprit, as it would cause internal leakage (bypassing) and reduce the effective force of the cylinder. Excessively tight track tension or low fuel would affect overall machine performance, not just a single function, and the AC system would have minimal to no impact on hydraulic function.
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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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