In setting out a long straight line for the position of transmission towers, it is recommended that the forward point be set out with face-right and face-lett with reference to preceding point and the mean position taken. This field procedure eliminates instruments error where the

trunnion axis is not perpendicular to vertical axis

vertical axis is not perfectly vertical time of observation

line of collimation is not perpendicular to the vertical axis

line of collimation is not perpendicular to the horizontal axis

In setting out a long straight line for the position of transmission t

1.	In setting out a long straight line for the position of transmission towers, it is recommended that the forward point be set out with face-right and face-lett with reference to preceding point and the mean position taken. This field procedure eliminates instruments error where the
A.	trunnion axis is not perpendicular to vertical axis
B.	vertical axis is not perfectly vertical time of observation
C.	line of collimation is not perpendicular to the vertical axis
D.	line of collimation is not perpendicular to the horizontal axis
Answer» E.

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In setting out a long straight line for the position of transmission towers, it is recommended that the forward point be set out with face-right and face-lett with reference to preceding point and the mean position taken. This field procedure eliminates instruments error where the

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