(i) The operations consisting of revolving the telescope through 180 ° in a vertical plane about its horizontal axis is called _____________ .
(ii) The process of establishing intermediate points with the help of a theodolite, on a given straight line whose ends are intervisible is called ---------------------.
(iv) If f is focal length of object lens, i is stadia interval and d is distance between the vertical axis of the tacheometer and the optical centre of the object lens, the additive and multiplying constants of the tacheometer are _________________ and ________________ .
(v) The purpose of anallactic lens in a tacheometer is to ________________________________.