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Q: Which of the following options represents the methods that can be used effectively to locate the routes of highways or railways from a contour map?
  • A. Method of cross-section and the tracing of contour gradient method
  • B. Method of cross-section and the equal depth contours method
  • C. Tracing of contour gradient method and the equal depth contours method.
  • D. Tracing of contour gradient method and the method of horizontal plane
Correct Answer: Option A - Cross-section method–This method is most suitable for the surveys of long narrow strips such as a road or highway, railway or canal etc. • Cross-sections are turn transverse to the centerline of the work and representative points are marked along the lines of cross-section. • This may be inclined at any angle to the center line if necessary. Tracing of contour gradient method–Tracing of contours is the process in which the position and reduced level of all such points is determined. It is also known as indirect method of contouring. This method is most suitable for undulated ground and hilly areas.
A. Cross-section method–This method is most suitable for the surveys of long narrow strips such as a road or highway, railway or canal etc. • Cross-sections are turn transverse to the centerline of the work and representative points are marked along the lines of cross-section. • This may be inclined at any angle to the center line if necessary. Tracing of contour gradient method–Tracing of contours is the process in which the position and reduced level of all such points is determined. It is also known as indirect method of contouring. This method is most suitable for undulated ground and hilly areas.

Explanations:

Cross-section method–This method is most suitable for the surveys of long narrow strips such as a road or highway, railway or canal etc. • Cross-sections are turn transverse to the centerline of the work and representative points are marked along the lines of cross-section. • This may be inclined at any angle to the center line if necessary. Tracing of contour gradient method–Tracing of contours is the process in which the position and reduced level of all such points is determined. It is also known as indirect method of contouring. This method is most suitable for undulated ground and hilly areas.