For the Abney clinometer the semi-circular arc is graduated as ............

During leveling if back sight is more than foresight ............

If a tacheometer is fitted with an anallatic lens ............

The zero of the graduated circle of prismatic compass is located at ............

In a whole circle system, the bearing of a line is measured ............

An imaginary line lying throughout on the surface of the earth and preserving a constant inclination to the horizontal, …

In a simple curve, "External distance" is the distance between ............

The space of cross-sections in a hilly country is usually ............

Pick up the odd instrument ............