Surveying
The value of geocentric parallax to be added to the observed altitude of sun is

9" cot α
9" tan α
9" cos α
9" sin α

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Surveying
The difference between a level line and a horizontal line is that

level line is normal to plumb line while horizontal line may not be normal to plumb line at the tangent point to level line
both are same
horizontal line is normal to plumb line while level line may not be normal to the plumb line
level line is a curved line while hori-zontal line is a straight line

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Surveying
Which of the following errors is not eliminated by the method of repetition of horizontal angle measurement ?

error due to displacement of station signals
error due to wrong adjustment of line of collimation and trunnion axis
error due to eccentricity of verniers
error due to inaccurate graduation

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

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