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Surveying

Surveying
In a spherical triangle ABC, right angled at C, sin b equals

cot A tan a
cos a sin A
sin a cos A
tan a cot A

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Surveying
To obtain photographs of an area of 1000 m average elevation, on scale 1 : 30,000, with a camera of 30 cm focal length, the flying height is

7000 m
4000 m
5000 m
6000 m

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Surveying
After fixing the plane table to the tripod, the main operations which are needed at each plane table station are
(i) Levelling
(ii) Orientation(
iii) Centering
The correct sequence of these operations is

(i), (ii), (iii)
(iii), (i), (ii)
(ii), (iii), (i)
(i), (iii), (ii)

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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

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Surveying
Local attraction in compass surveying may exist due to

presence of magnetic substances near the instrument
friction of the needle at the pivot
loss of magnetism of the needle
incorrect levelling of the magnetic needle

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Surveying
The main object of the astronomer to obtain

Astronomical latitude
Astronomical bearing
All of these
Astronomical longitude

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MORE MCQ ON Surveying

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