Heavy Equipment Operator Certification Exam Prep · Question
An operator is using a laser level system with a rotating laser and a mast-mounted receiver. The receiver display shows 'on grade' at an elevation of 150.000 metres. If the operator needs to dig 500 mm deeper, what should the new target elevation for the cutting edge be?
To dig deeper, the target elevation must be lower than the current 'on grade' elevation. Therefore, subtract the desired depth from the current grade: 150.000 m
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Question: An operator is using a laser level system with a rotating laser and a mast-mounted receiver. The receiver display shows 'on grade' at an elevation of 150.000 metres. If the operator needs to dig 500 mm deeper, what should the new target elevation for the cutting edge be?
Answer options: ✅ 149.500 metres
- 150.000 metres
- 150.500 metres
- 100.000 metres
Correct answer: 149.500 metres
Explanation: To dig deeper, the target elevation must be lower than the current 'on grade' elevation. Therefore, subtract the desired depth from the current grade: 150.000 metres - 0.500 metres = 149.500 metres.
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