State the fundamental axes and mention their relationship for a dumpy level.

State the fundamental axes and mention their relationship for a dumpy level.
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1 Answer

Answer :

Fundamental axis of dumpy level are as follows;

i) The vertical axis

ii) The axis of bubble tube

iii) The line of collimation

iv) The axis of the telescope

Relationship between fundamental axis of dumpy level

i) The axis of level tube should be perpendicular to the vertical axis

ii) The line of collimation should be parallel to the axis of bubble tube

iii) Axis of telescope and line of collimation should coincide when

dumpy level is correctly leveled.
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