Surveying
The sensitivity of a bubble tube can be increased by

decreasing the length of bubble
increasing the viscosity of liquid
increasing the diameter of the tube
decreasing the radius of curvature of tube

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Surveying
Which of the following methods of theodolite traversing is suitable for locating the details which are far away from transit stations?

Measuring distance from two points on traverse line
Measuring angle and distance from one transit station
Measuring angles to the point from at least two stations
Measuring angle at one station and distance from other

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