Surveying
With standard meridian as 82° 30' E the standard time at longitude 90° E is 8 h 30 m. The local mean time at the place will be

9 h 00 m
7 h 00 m
8 h 00 m
7 h 30 m

ANSWER DOWNLOAD EXAMIANS APP

Surveying
Refraction correction

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

ANSWER DOWNLOAD EXAMIANS APP