Surveying
Three point problem can be solved by

All of these
Tracing paper method
Lehman’s method
Tracing paper method

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Surveying
The length of a chain is measured from

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
centre of one handle to centre of other handle

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Surveying
Normal tension is that pull which

makes the correction due to pull equal to zero
is used at the time of standardising the tape
makes the correction due to sag equal to zero
neutralizes the effect due to pull and sag

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