In leveling, a point is defined as the location where a backsight on a leveling rod is taken from one instrument station and a foresight is taken to the next instrument station. Which term describes that point?

• A. Tribrach
• B. Turning
• C. Tripod
• D. Revolving

Answer: (B)

The main idea here is the turning point in leveling. This is the point where you switch the instrument from the current station to the next one: you take a backsight on the leveling rod at the current station and then fore sight to the next station. The location where this change occurs is called the turning point. It marks the transition as you “turn” the line of sight to continue leveling along the line of stations.

The other terms refer to equipment rather than the point itself: tribrach is the adapter that attaches the instrument to the tripod, tripod is the stand supporting the instrument, and revolving isn’t a standard term used in this leveling context.