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Surveying

Surveying
A metallic tape is made of

steel
cloth and wires
linen
invar

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Surveying
Subtense bar is an instrument used for

measurement of angles
measurement of horizontal distances in plane areas
levelling
measurement of horizontal distances in undulated areas

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Surveying
The altitudes of a circumpolar star at culminations are 70° and 10°, both culminations being north of zenith. The declination of the star, is

60°
50°
70°
80°

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Surveying
Local attraction in compass surveying may exist due to

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

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Surveying
The principal line is the line joining the principal point and

None of these
Isocenter
Nadir
Perspective centre

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Surveying
The moon rotates round the earth once in every

29 days
29.35 days
29.53 days
30 days

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