A disadvantage of plane table survey is ............

An ideal transition curve is ............

The length of a link of Gunter's chain is ............

To use the Abney clinometer as Abney level the vernier should read ............

An important rule in using pantograph is ............

Indirect ranging is adopted when the two ends of chain line are ............

Resolving power of a telescope depends on ............

The vertical distance between any two consecutive contours is called ............

A staff reading taken on a bench mark or a point known elevation is called ............