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An isobar diagram consists of __________

(a) family of isobars of various intensities

(b) single isobar only

(c) two isobars only

(d) isobars of same intensities

The question was posed to me during an interview.

Question is taken from Stress Distribution in portion Stress Distribution of Geotechnical Engineering I

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Best answer
The correct option is (a) family of isobars of various intensities

Best explanation: An isobar is a spatial, curved surface of the shape of bulb. This is because the vertical pressure on a given horizontal plane is the same in all directions at all points located at equal radial distances around the axis of loading. Considering parallel horizontal planes, there will be different vertical pressures. Therefore, An isobar diagram consists of family of isobars of various intensities.

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