For true difference in elevations between two points A and B, the level must be set up ............

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

Different grades are joined together by ............

The amount of correction due to local attraction at a place ............

If the angle between index glass and horizon glasses of a box sextant is 40° the horizontal angle between A and B sight …

A leveling station is a place where ............

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

The diaphragm of a leveling telescope contains ............

In indirect method of contouring, the best method of interpolation if contours ............