Consider the following statements regarding a transit theodolite: 1) Parallax error can be eliminated by properly focusing the eyepiece and the objective lens. 2) The size of a theodolite is designated by the total length of its telescope. Which of the statements given above is/are CORRECT?

In survey work using a total station with reflector measurements, which of the following sequence of temporary adjustments must be performed at a station?

While carrying out a total station survey on one bank of a 250 m wide river, it is necessary to plot electric transmission posts on the opposite bank. No provision exists for crossing the river and the posts are inaccessible. In which mode should the survey work be done?