Surveying
Contour interval is

Larger if the time available is more
Larger for accurate works
Directly proportional to the flatness of ground
Inversely proportional to the scale of the map

ANSWER DOWNLOAD EXAMIANS APP

Surveying
Refraction correction

partially eliminates curvature correction
has no effect on curvature correction
completely eliminates curvature correction
adds to the curvature correction

ANSWER DOWNLOAD EXAMIANS APP