Review Questions

M4-RQ1 Define the following terms: Level surface, Plumb line, Elevation, B.M., R.L.; Datum; (ii) Control Point; Change point.

M4-RQ2 Draw neat sketches to show the salient parts of (i) Dumpy level and (ii) IOP level. Mention their chief differences along with their field of application.

M4-RQ3 Enumerate the fundamental lines of a dumpy level and state with a sketch their relationship in a parmanently adjusted instrument.

M4-RQ4 Explain “Temporary Adjustment of a level”.

M4-RQ5 Enumerate and then define the different types of leveling operation along with their relevance in engineering survey.

M4-RQ6 . Distinguish between the following pairs:

Backsight and Foresight

Line of collimation and axis of telescope

Horizontal and level surface

Sectioning and cross-sectioning.

M4-RQ7 List in a tabular form the errors in leveling stating their types, sources, nature, causes, procedure to eliminated special feature, if any.

M4-RQ8 Why should a long base be used in determining the height of an inaccessible point by trigonometrical levelling ?

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