CST Level 1 Land Surveyor Certification Practice

Question: 1 / 400

What is the primary purpose of rocking a level rod on a point during a level circuit?

To allow the instrument operator to observe the highest rod reading

Rocking a level rod is a technique employed during a level circuit to help the instrument operator observe the maximum reading on the rod. The motion of rocking the rod back and forth allows the operator to pinpoint the highest observable reading, which is critical for ensuring accurate elevation measurements. This practice is particularly valuable because it accounts for potential reading fluctuations that may occur due to slight rod movements or observer parallax.

When the rod is rocked, any variations in the level of the ground or the positioning of the rod can be detected, and the highest value can be recorded for accuracy. This practice helps to mitigate the risks associated with errors in leveling operations, enabling the surveyor to obtain precise and reliable measurements.

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To reduce error due to refraction

To determine if the rod is on the highest point of the monument

To allow the instrument operator to determine when the rod is vertical over the monument

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