The method of finding out the difference in elevation between two points for eliminating the effect of curvature and refraction is ............

Short offsets are measured with ............

If the smallest division of a vernier is longer than the smallest division of its primary scale, the vernier is known as…

A negative declination shows that the magnetic meridian is to the ............

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

Tacheometry is best suited ............

The difference between the sum of the angles of a spherical triangle on the earth's surface and the angles of the corres…

Line of collimation ............

The line normal to the plumb line is known as ............