CST Level 1 Land Surveyor Certification Practice

What type of instrument is a Jacob's Staff?

1. A bipod leveling device

2. A standard tool for topographic surveys

3. A monopod used for precise leveling

4. A digital measuring instrument

The correct answer is: A monopod used for precise leveling

A Jacob's Staff is primarily recognized as a monopod used for precise leveling in surveying applications. It serves as a sturdy reference point for establishing line-of-sight measurements and can be marked at varied heights to facilitate accurate readings from a leveling instrument. This instrument is typically made of wood or metal and allows surveyors to easily set and adjust the height at which they take measurements, making it valuable for ensuring that readings are accurate, particularly when utilizing leveling techniques. While it is true that the Jacob's Staff has been replaced in many cases by more modern technology, it remains an important part of surveying history and is still acknowledged for its effectiveness in specific contexts. In contrast, a bipod leveling device, a standard tool for topographic surveys, and a digital measuring instrument serve different functions and utilize different methodologies in the field of land surveying.