In precision theodolite traverse if included angles are read twice and the mean reading accepted
using both verniers having a least count of 30". Assuming the instrument to be in perfect
adjustment, linear measurements correct to 6 mm per 30 metre tape duly corrected for
temperature, slope and sag, the angular error of closure not to exceed (where n is the number of
traverse legs)
(A) 50" n
(B) 30" n
(C) 60" n
(D) None of these
using both verniers having a least count of 30". Assuming the instrument to be in perfect
adjustment, linear measurements correct to 6 mm per 30 metre tape duly corrected for
temperature, slope and sag, the angular error of closure not to exceed (where n is the number of
traverse legs)
(A) 50" n
(B) 30" n
(C) 60" n
(D) None of these