Exercise: Surveying

Questions for: Surveying

While rotating the theodolite in the horizontal plane, the bubble of the bubble tube takes up the same position in its tube, it indicates
A:
the rotation axis is vertical
B:
the trummion axis is horizontal
C:
the line of collimation is perpendicular to vertical axis
D:
none of the above
Answer: A
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A theodolite is said to be in perfect adjustment if
A:
rotation axis is vertical to the transit axis
B:
transit axis is perpendicular to line of collimation
C:
line of collimation sweeps out a vertical plane while the telescope is elevated or depressed
D:
all the above.
Answer: D
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In case of reduction of levels by the height of instrument method,
A:
∑ B.S. - ∑ F.S. = difference in R.L.S of the first station and last station
B:
∑ (R.L. + I + F.S.) - first R.L = ∑ (H.I. + No. of R.L.s.)
C:
both (a) and (b) above
D:
neither (a) nor (b).
Answer: D
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Imaginary line passing through points having equal magnetic declination is termed as
A:
isogon
B:
agonic line
C:
isoclinic line
D:
none of these.
Answer: A
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The longitudinal section of the surface of bubble tube is
A:
straight
B:
circular
C:
parabolic
D:
elliptic.
Answer: B
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