For indirect ranging, number of ranging rods required is ............

A contour map of the area is essential before proceeding with the construction of ............

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

The power of a telescope to form distinguishable images of objects separated by small angular distance is called its ...…

Usefullness of plane table is enhanced by providing ............

Horizontal distances obtained tacheometerically are corrected for ............

In chain surveying tie lines are primarily provided ............

If x is the smallest division on the main scale and n are the number of divisions on the vernier, then the least count o…

Sensitiveness of a level tube depends upon ............