Set 3 Practice Mode

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Q3081
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What is the process if the difference of level between two points is determined by setting the levelling instrument midway between the point?
Q3082
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Which type of the collimation error is eliminated?
Q3083
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What is the name of the imaginary line of constant elevation on the ground surface?
Q3084
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What method of contour is suitable for small and low undulating area?
Q3085
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What method of contour is suitable for contouring in hilly areas?