Surveying
The angle between the observer's meridian and declination circle of a heavenly body, is known as

Hour angle
Right ascension
Declination
Azimuth

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Surveying
Dumpy level is most suitable when

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

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Surveying
Transit rule of adjusting the consecutive coordinates of a traverse is used where

linear measurements are more accurate than angular measurements
All of these
angular measurements are more accurate than linear measurements
linear and angular measurements of the traverse are of equal accuracy

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