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 β/S h (tan α + tan β)/S h (tan α - tan β)/S h tan α/S h tan β/S h (tan α + tan β)/S h (tan α - tan β)/S h tan α/S ANSWER DOWNLOAD EXAMIANS APP
Surveying For a well-conditioned triangle, no angle should be less than 60° 45° 20° 30° 60° 45° 20° 30° ANSWER DOWNLOAD EXAMIANS APP
Surveying The point where a vertical line through the optical centre of the camera lens intersects the ground, is known as Ground principal point Iso-centre Perspective centre Ground plumb point Ground principal point Iso-centre Perspective centre Ground plumb point ANSWER DOWNLOAD EXAMIANS APP
Surveying At upper culmination, the pole star moves Westward Southward Northward Eastward Westward Southward Northward Eastward ANSWER DOWNLOAD EXAMIANS APP
Surveying If the focal length of the object glass is 25 cm and the distance from object glass to the trunnion axis is 15 cm, the additive constant is 0.6 1.33 0.1 0.4 0.6 1.33 0.1 0.4 ANSWER DOWNLOAD EXAMIANS APP
Surveying Invar tapes used for measuring base lines, is made of nickel-iron alloy containing nickel 0.36 0.24 0.6 0.4 0.36 0.24 0.6 0.4 ANSWER DOWNLOAD EXAMIANS APP
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