Heavy Equipment Operator Certification Exam Prep · Question
A laser receiver mounted on an excavator's stick indicates a '-25 mm' reading. The target grade is set on the laser transmitter to 125.500 metres. What is the current elevation of the cutting edge?
A negative reading on a laser receiver means the cutting edge is below the target beam. Therefore, to find the current elevation, subtract the receiver reading
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Question: A laser receiver mounted on an excavator's stick indicates a '-25 mm' reading. The target grade is set on the laser transmitter to 125.500 metres. What is the current elevation of the cutting edge?
Answer options:
- 125.475 metres
- 125.500 metres ✅ 125.525 metres
- 125.750 metres
Correct answer: 125.525 metres
Explanation: A negative reading on a laser receiver means the cutting edge is below the target beam. Therefore, to find the current elevation, subtract the receiver reading from the target grade: 125.500 m - (-0.025 m) = 125.525 m.
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