The length of an engineer's chain is ............

A diagonal scale is used to read ............ dimensions.

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

The length of a traverse line (L) may be obtained by ............

The lines passing through points at which the magnetic declination is equal at a given time are called ............

Number of links per metre length of a chain are ............

In the prismatic compass ............

Hypotenusal allowance is ............

Usefullness of plane table is enhanced by providing ............