While doing leveling in undulating terrain, it is preferable to set level on ............

When the cross-hairs are not clearly visible ............

A well conditioned triangle has no angle less than ............

Cross hairs in surveying telescope, are fitted ............

The direction of steepest slope on a contour, is ............

The surveying used to determine additional details such as boundaries of fields, is called ............

A line joining some fixed points on the main survey lines, is called a ............

Distance between two stations A and B is 200 m whereas their difference in elevations is 2 m. hence horizontal distance …

Theory of probability is applied to ............