Virtual Labs

a: Fly levelling b: Differential levelling c: Simple levelling d: Trigonometric levelling

a: In front of eye piece b: At the centre of the telescope c: In the objective glass d: At the optical centre of eye piece

a: Precise instruments b: Precise methods c: Good planning d: All of the above

a: Fly b: Differential c: Profile d: Reciprocal

a: is independent of the size of the object glass b: increases as the size of the eye piece increases c: decreases as the distance between eye piece and object increases d: all of the above

Study of various parts of auto level.