CST Level 1 Land Surveyor Certification Practice

The primary reason for stacking multiple prisms during a setup is to increase the reflective area for measurements. When multiple prisms are used, they collectively provide a larger surface area for the instrument's laser or light source to reflect off. This enhances the accuracy of distance measurements and improves the signal received by the surveying instrument. A larger reflective area can also help in situations where there may be obstacles or interference in the line of sight, ensuring that the measurement is reliable and precise.

In contrast to this, improving line of sight is more a matter of placement and elevation than stacking prisms. Greater distance between readings is generally achieved through proper instrument setup and positioning rather than the stacking of prisms. Enhancing the phase signal pertains more to advanced surveying techniques, which may involve more sophisticated instruments and methods rather than a basic setup with prisms. Thus, increasing the reflective area is the most direct and practical benefit provided by stacking multiple prisms.