Surveying
Dumpy level is most suitable when

All of these
many readings are to be taken from a single setting of the instrument
the instrument is to be shifted frequently
fly levelling is being done over long distance

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Surveying
The rise and fall method

is less accurate than height of instrument method
provides a check on the reduction of intermediate point levels
is not suitable for levelling with tilting levels
quicker and less tedious for large number of intermediate sights

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