Surveying - Engineering

Q1:

The theodolites used for making tacheometric observations by optical wedge system, are

A provided with stadia hairs in front of eye piece

B not provided with stadia hairs at all

C fitted with a glass wedge inside the telescope

D fitted with a glass wedge in front of telescope.

ANS:D - fitted with a glass wedge in front of telescope.

Optical Wedge system.

A special theodolite with a measuring device in front of the telescope s directed at a staff. One pointing of the instrument is required for each set of readings.