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Surveying

Surveying
In an internal focussing type of telescope, the lens provided is

concave
plano-concave
plano-convex
convex

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Surveying
Triangulation surveys are carried out for locating

Engineering works, i.e. terminal points of long tunnels, bridge abutments, etc.
All of these
Control points for photogrammetric surveys
Control points for surveys of large areas

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Surveying
The shortest distance between two places measured along the surface of the earth, is

None of these
Length of the parallel between their longitudes
Length of the arc of the great circle passing through them
Length of the equator between their longitudes

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Surveying
The orthogonal projection of the perspective centre on a tilted photograph, is called

Isocenter
Plumb point
Principal point
Nadir

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Surveying
In field astronomy, the quantities observed are entirely

Lengths
Angles
Heights
All of these

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Surveying
The maximum tolerance in a 20 m chain is

±3 mm
±2 mm
±5 mm
±8 mm

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