Surveying
The difference of parallax for a given difference in elevation is independent of

Overall size of the photo graphs
Percentage of overlap
All listed here
Focal length of the camera

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Surveying
Which of the following errors can be eliminated by taking mean of bot face observations ?

error due to line of collimation not being perpendicular to horizontal axis
error due to eccentricity of verniers
error due to imperfect graduations
error due to imperfect adjustment of plate levels

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Surveying
If altitude bubble is provided both on index frame as well as on telescope of a theodolite, then the instrument is levelled with reference toi) altitude bubble on index frameii) altitude bubble on index frame if it is to be used as a leveliii) altitude bubble on telescopeiv) altitude bubble on telescope if it is to be used as a levelThe correct answer is

both (i) and (iv)
only (i)
both (ii) and (iii)
only (iii)

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Surveying
If the lower clamp screw is tightened and upper clamp screw is loosened, the theodolite may be rotated

on its outer spindle with a relative motion between the vernier and graduated scale of lower plate
on its outer spindle without a relative motion between the vernier and gra-duated scale of lower plate
on its inner spindle without a relative motion between the vernier and the graduated scale of lower plate
on its inner spindle with a relative motion between the vernier and the graduated scale of lower plate

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Surveying
Pick up the incorrect statement from the following. In a spherical triangle

Sum of the three angles is equal to two right angles
Sum of the three angles less than six right angles and greater than two right angles
Sum of any two sides is greater than the third
Every angle is less than two right angles

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