CST Level 1 Land Surveyor Certification Practice

What does "TBM" stand for in land surveying?

1. Total Benchmark Measurement

2. Temporary Benchmark

3. Truncated Benchmark

4. Technical Benchmark

The correct answer is: Temporary Benchmark

In land surveying, "TBM" stands for "Temporary Benchmark." A Temporary Benchmark is a point of reference used to establish elevations for a project, which can be temporary due to its nature. It is especially useful on construction sites or during surveying where a permanent benchmark might not yet be established or accessible. Temporary benchmarks help ensure that the elevations are consistent and accurately recorded during a survey or construction activity. These benchmarks are typically marked and documented carefully so that they can be referenced in future measurements. Their role is essential in providing a reliable datum for ongoing surveys, maintaining accuracy in elevation data, and ensuring construction projects are laid out correctly relative to existing topography. The other terms do not correspond to commonly recognized concepts in land surveying. For instance, "Total Benchmark Measurement" and "Technical Benchmark" are not standard phrases in this context, and "Truncated Benchmark" does not relate to established practices in surveying either. Hence, "Temporary Benchmark" is the term that accurately captures the concept as used in surveying work.