Excavator Operator Certification Exam Prep · Question
Why is 'hydrovac' often preferred over manual hand tools for exposing buried utilities in sensitive areas?
Hydrovac uses non-destructive methods (high-pressure water and vacuum) to expose utilities, making it much safer than metal hand tools which can inadvertently s
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Question: Why is 'hydrovac' often preferred over manual hand tools for exposing buried utilities in sensitive areas?
Answer options:
- It is generally faster and requires less physical effort than hand digging. ✅ Hydrovac uses high-pressure water to break up soil and a vacuum to remove it, significantly reducing the risk of damaging lines compared to metal hand tools.
- It can excavate through solid rock, which hand tools cannot.
- Hydrovac is less expensive to operate than manual labour.
Correct answer: Hydrovac uses high-pressure water to break up soil and a vacuum to remove it, significantly reducing the risk of damaging lines compared to metal hand tools.
Explanation: Hydrovac uses non-destructive methods (high-pressure water and vacuum) to expose utilities, making it much safer than metal hand tools which can inadvertently strike and damage lines, especially in complex utility corridors. While it can be faster, the primary advantage is safety and reduced damage risk.
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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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