Surveying The scale of the photography taken from a height of 300 m, with a camera of focal length 15 cm, is 1 : 30,000 1 : 10,000 1 : 15,000 1 : 20,000 1 : 30,000 1 : 10,000 1 : 15,000 1 : 20,000 ANSWER DOWNLOAD EXAMIANS APP
Surveying ‘H’ is the flying height above mean ground level and ‘f’ is the principal distance of a vertical photograph. The mean scale of the photographs is f/H H/f H + f H. f f/H H/f H + f H. f ANSWER DOWNLOAD EXAMIANS APP
Surveying Polaris is usually observed for the determination of the latitude when it is Either at culmination or at elongation At elongation Neither at culmination nor at elongation At culmination Either at culmination or at elongation At elongation Neither at culmination nor at elongation At culmination ANSWER DOWNLOAD EXAMIANS APP
Surveying The distance between the projection centre and the photograph, is called Principal distance Principal line Focal length Isocentric distance Principal distance Principal line Focal length Isocentric distance ANSWER DOWNLOAD EXAMIANS APP
Surveying The angle of intersection of the two plane mirrors of an optical square is 90° 30° 45° 60° 90° 30° 45° 60° ANSWER DOWNLOAD EXAMIANS APP
Surveying If ‘δ’ is the declination of the Polaris and ‘λ’ is the latitude of the place, the azimuth of the Polaris, is sin (90° - δ)/sin (90° - λ) cos δ/cos λ cos (90° - δ)/cos (90° - λ) tan (90° + δ)/tan (90° + λ) sin (90° - δ)/sin (90° - λ) cos δ/cos λ cos (90° - δ)/cos (90° - λ) tan (90° + δ)/tan (90° + λ) ANSWER DOWNLOAD EXAMIANS APP
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