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Surveying

Surveying
A metallic tape is made of

cloth and wires
linen
steel
invar

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Surveying
The great circle whose plane is perpendicular to the axis of rotation of the earth, is called

Terrestrial equator
Equator
0° latitude
All of these

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Surveying
If the horizontal distance between the staff point and the point of observation is d, then the error due to curvature of earth is proportional to

1/d
d
d2
1/d2

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Surveying
23 cm × 23 cm photographs are taken from a flying height with a camera of focal length of 3600 m and 15.23 cm respectively. A parallax difference of 0.01 mm represents

3 m
1 m
2 m
4 m

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Surveying
According to Napier's Rules of circular parts for a right angled triangle, sine of middle part equals the product of

Sines of two adjacent parts
Cosines of two adjacent parts
Tangents of two adjacent parts
Both (A) and (B) above

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Surveying
Limiting gradient for locating the base line on evenly-sloping ground, is

1 in 6
1 in 8
1 in 10
1 in 12

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