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

0.4
0.6
1.33
0.1

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Surveying
For a line AB

both (A) and (B) are correct
the forebearing of AB and back bearing of BA differ by 180°
none is correct
the forebearing of AB and back bearing of AB differ by 180°

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Surveying
Pick up the correct statement from the following. The difference between the longitudes of the places is obtained.

All of these
By adding their longitudes if places are in the different hemispheres
By subtracting the sum of their longitudes exceeding 180° from 360° if places are in different hemispheres
By subtracting their longitudes if places are in the same hemisphere

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