Which of the following statements is/are true with respect to types of curves? Statement A: A compound curve consists of two or more simple circular arcs that turn in the same direction and join at common tangent points. Statement B: A reverse curve consists of two circular arcs of different or equal radii, having their centres on different sides of a common tangent.

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?