Virtual Labs

a: At the centre of the telescope b: At the optical centre of the eye-piece c: Anywhere inside the telescope d: In the plane of cross hairs

a: Differential levelling b: Cross levelling c: Profile levelling d: Reciprocal levelling

a: they are too far apart b: the difference in elevation between them is too great c: there are obstacles between them d: All of the above

a: plane alidade b: telescopic alidade c: tacheometer d: clinometer

a: profile levelling b: differential levelling c: check levelling d: both differential and check levelling

Carry out fly leveling using auto level.