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Question

The line normal to the plumb line is known as

A
Horizontal line
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B
Level line
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C
Vertical line
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D
Datum line
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Solution

The correct option is B Level line
  • Horizontal line: It is a line tangential to the level line lying in the horizontal plane.
  • Level line: It is a line lying on a level surface, normal to the plumb line at all the points.
  • Vertical line: It is a line normal to the horizontal line. It is a line from any point on the earth's surface to the center of the earth. It is commonly considered to be the line defined by a plumb line.
  • Datum line: It is a level line used to measure elevation.

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