embankment on the centre line
excavation on the centre line
earth work on the centre line
none of these.
positive compensating error
negative compensating error
positive cumulative error
negative cumulative error.
linear measurements only
angular measurements only
both linear and angular measurements
line of sight is horizontal
axis of the telescope is horizontal
line of collimation is horizontal
geometrical axis of the telescope is horizontal.
the power of a lens is the reciprocal of its focal length
the unit of power of the lens is diopter
the power of two or more thin lenses in contact is the power of the combination of the lenses
All of these