Surveying
Horizontal distances obtained by thermometric observations

require slope correction
require tension correction
require slope and tension corrections
do not require slope and tension corrections

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Surveying
The length of a chain is measured from

centre of one handle to centre of other handle
inside of one handle to inside of other handle
outside of one handle to inside of other handle
outside of one handle to outside of other handle

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

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

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Surveying
For a line AB

the forebearing of AB and back bearing of AB differ by 180°
none is correct
both (A) and (B) are correct
the forebearing of AB and back bearing of BA differ by 180°

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