Surveying
If the length of a chain is found to be short on testing, it can be adjusted by

closing the joints of the rings if opened out
All of these
removing one or more small circular rings
straightening the links

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Surveying
In triangulation surveys

The area is divided into triangular figures
Control stations are located from which detailed surveys are carried out
All listed here
Sides are not measured excepting the base line

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Surveying
Theodolite is an instrument used for

tightening the capstan-headed nuts of level tube
measurement of horizontal angles only
measurement of both horizontal and vertical angles
measurement of vertical angles only

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