An internal focusing type surveying telescope, may be focused by the movement of ............

A fixed point of reference of known elevation is called ............

The adjustment of horizontal cross hair is required particularly when the instrument is used for ............

Which of the following instrument is generally used for base line measurements?

A curve of varying radius is known as ............

Magnetic declination at any place ............

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

Left swing is not much favoured in theodolite survey because ............

At the equator, the amount of dip is ............