Surveying α and β are the angles subtended by a point of elevation h at their air station with respective plumb points. Photo scale and focal length of the lens being ‘S’ and ‘f’ respectively. Parallax displacement of the point due to relief, is h (tan α + tan β)/S h (tan α - tan β)/S h tan β/S h tan α/S h (tan α + tan β)/S h (tan α - tan β)/S h tan β/S h tan α/S ANSWER DOWNLOAD EXAMIANS APP
Surveying If the staff is not held vertical at a level¬ling station, the reduced level calculated from the observation would be less than true R.L. more than true R.L. true R.L. None of these less than true R.L. more than true R.L. true R.L. None of these ANSWER DOWNLOAD EXAMIANS APP
Surveying The zenith is the point on the celestial sphere North of observer East of observer South of observer West of observer North of observer East of observer South of observer West of observer ANSWER DOWNLOAD EXAMIANS APP
Surveying The relief displacement of a building 72 m high on photograph is 7.2 mm and its top appears 10 cm away from principal point. The flying height of the camera, is 2000 m 500 m 1000 m 1500 m 2000 m 500 m 1000 m 1500 m ANSWER DOWNLOAD EXAMIANS APP
Surveying The maximum tolerance in a 20 m chain is ±5 mm ±2 mm ±3 mm ±8 mm ±5 mm ±2 mm ±3 mm ±8 mm ANSWER DOWNLOAD EXAMIANS APP
Surveying Triangulation surveys are carried out for locating Control points for photogrammetric surveys Control points for surveys of large areas All of these Engineering works, i.e. terminal points of long tunnels, bridge abutments, etc. Control points for photogrammetric surveys Control points for surveys of large areas All of these Engineering works, i.e. terminal points of long tunnels, bridge abutments, etc. ANSWER DOWNLOAD EXAMIANS APP
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