Excavator Operator Certification Exam Prep · Question
An excavator's operating manual specifies a daily check of the coolant level in the expansion tank. What is the correct procedure for performing this check?
Coolant levels are typically checked when the engine is cold to get an accurate reading in the expansion tank, which should be between the 'min' and 'max' indic
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Question: An excavator's operating manual specifies a daily check of the coolant level in the expansion tank. What is the correct procedure for performing this check?
Answer options: ✅ Check the coolant level when the engine is cold, ensuring it is between the 'min' and 'max' marks.
- Check the coolant level when the engine is hot, ensuring it is just above the 'max' mark.
- Remove the radiator cap to verify the coolant level directly.
- Shake the machine to slosh the coolant and estimate the level.
Correct answer: Check the coolant level when the engine is cold, ensuring it is between the 'min' and 'max' marks.
Explanation: Coolant levels are typically checked when the engine is cold to get an accurate reading in the expansion tank, which should be between the 'min' and 'max' indicators. Opening a hot radiator cap can be extremely dangerous due to pressurized hot coolant, and estimating the level is inaccurate. Checking while cold allows for safe and precise assessment.
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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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