In taping the length of a line, what procedure should be used in open ground for

Question

In taping the length of a line, what procedure should be used in open ground for accurate measurements? 1. normal tension 2. tape is to be plumbed at both ends 3. temperature and tension correction 4. no special procedure The purpose of rocking a level rod on a point during a level circuit is: 1. to allow the instrument operator to observe the highest rod reading 2. to reduce error due to refraction 3. so the instrument operator can determine if the rod is on the highest point of the monument 4. to allow the instrument operator to determine when the rod is vertical over the monument

Explanation / Answer

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A 148]

In case of tapping the length of line both the temperature and tension corrections are to be calculated and then finally arrie at the corrected length of the line.

A149] The main prupose of the rocking of a level line on a point during a level circuit is to allow the instrument operator to check and determine whether the rod is vertical over the monument.

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