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Surveying

Surveying
The normal longitudinal overlap is generally kept

0.6
0.75
0.5
0.7

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Surveying
If the magnetic bearing of the sun at a place at noon in southern hemisphere is 167°, the magnetic declination at that place is

13° E
13° W
77° N
23° S

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Surveying
Triangulation surveys are carried out for locating

Control points for surveys of large areas
Engineering works, i.e. terminal points of long tunnels, bridge abutments, etc.
Control points for photogrammetric surveys
All of these

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Surveying
A star in northern sphere is said to transit

All listed here
When its azimuth is 180°
When it is in south
When its altitude is maximum

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Surveying
If the focal length of the object glass is 25 cm and the distance from object glass to the trunnion axis is 15 cm, the additive constant is

0.4
1.33
0.6
0.1

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Surveying
If ‘δ’ is the declination of the Polaris and ‘λ’ is the latitude of the place, the azimuth of the Polaris, is

tan (90° + δ)/tan (90° + λ)
cos (90° - δ)/cos (90° - λ)
cos δ/cos λ
sin (90° - δ)/sin (90° - λ)

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