Multiple Choice Question (MCQ)
Question: Which command is used to measure the diameter of a circle?
A.
DIM JO/DJO
B.
DIM DIA/DDI
C.
DIM ANG/DAN
D.
DIM CON/DCO
Correct Answer: DIM DIA/DDI
Explanation
Optical plummet is used in a total station is used for accurate centering over a station. It has either a bullseye or cross hair sight for positioning the instrument over a survey marker or ground control point.
The older tribraches required a plumb line to allow them to be positioned vertically over a point and took longer to set up.Some modern total stations have an integral laser plummet built in.