Surveying
If a tripod settles in the interval that elapses between taking a back sight reading and the following foresight reading, then the elevation of turning point will

increase
decrease
either ‘A’ or ‘B’
not change

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Surveying
Contour interval is

Directly proportional to the flatness of ground
Larger for accurate works
Inversely proportional to the scale of the map
Larger if the time available is more

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

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