Surveying
The angular distance of a heavenly body from the equator, measured along its meridian, is called

Co-latitude
Altitude
Zenith distance
Declination

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Surveying
Accidental errors

Cannot be removed by applying corrections to the observed values
All of these
Are generally small
Do not follow any definite mathematical law

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Surveying
The error due to eccentricity of inner and outer axes can be eliminated by

taking mean of several readings distributed over different portions of the graduated circle
taking both face observations and taking the mean of the two
double sighting
reading both verniers and taking the mean of the two

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