a) State four personal and four instrumental errors in
levelling.
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Instrumental Errors in Leveling | Type of Errors in Leveling
• Using the wrong point for a benchmark.
• Reading rod incorrectly.
• Reading on the stadia crosshair instead of the middle crosshair.
• Reading wrong numbers.
Checking of levels with known R.L.
Instrumental Errors.
• Error Due to Impact Adjustment.
• Error Due to Sluggish Bubble.
Explanation:
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