GATE (CE) 2022: SURVEYING #27 (App update required to attempt this test)

Which ones of the following are parallel to each other?

A theodolite is set up at station A. The RL of instrument axis is 212.250 m. The angle of elevation to the top of a 4 m long staff, held vertical at station B, is 7°. The horizontal distance between stations A and B is 400 m. Neglecting the errors due to curvature of earth and refraction, the RL (in m, round off to three decimal places) of station B is _______.

The top of a hill subtends an angle at a point A . The same point on the top of the hill subtends an angle of at point B which is in direct line joining point A and the top of the hill. Distance between A and B was 1400 m. If elevation of point A is 405.25 m then the elevation of the hill and its distance from point A will be

A theodolite is set up a station A and 4 m long staff is held vertically at station B . The depression angle reading at 3.5 m marking on the staff is . The horizontal distance between A and B is 2000 m. Height of instrument at station A is 1.5 m and R.L. of A is 900.20 m. IF curvature and refraction correction is applied then the R.L. of B (in m.) is ______.

To find the R.L of the top of the tower C, instrument was kept at two station A and B 75 m apart. If angle of elevation taken from A and B to point C are 20 and 45 respectively and back site reading to benchmark of RL 165 m from A and B are 3.5 and 1.5m respectively. Then calculate the RL of tower top in meter assuming all three points lie in same vertical plane. Report the answer upto 3 decimal places.