Surveying
The time interval between successive transits of the moon, is

24 hours 50 minutes
20 hours 25 minutes
23 hours 50 minutes
24 hours 10 minutes

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Surveying
In triangulation surveys

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

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Surveying
Which of the following errors cannot be eliminated by taking both face observations ?

error due to horizontal axis not being perpendicular to the vertical axis
None of these
error due to non-parallelism of the axis of telescope level and line of collimation
index error i.e. error due to imperfect adjustment of the vertical circle vernier

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