Surveying
Which of the following errors can be eliminated by taking mean of bot face observations ?

error due to imperfect graduations
error due to line of collimation not being perpendicular to horizontal axis
error due to imperfect adjustment of plate levels
error due to eccentricity of verniers

ANSWER DOWNLOAD EXAMIANS APP

Surveying
The meridian of a place is

A great circle passing through the place and the poles
A great circle whose plane is perpendicular to the axis of rotation and it also passes through the place
A semi-circle which passes through the place and is terminated at the poles
An arc of the great circle which passes through the place and is perpendicular to the equator

ANSWER DOWNLOAD EXAMIANS APP

Surveying
For a line AB

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

ANSWER DOWNLOAD EXAMIANS APP