# Surveying Questions and Answers – Uses of Contour Maps

This set of Surveying Questions and Answers for Entrance exams focuses on “Uses of Contour Maps”.

1. From a given contour plan, the section along any given direction can be drawn to know the ______
a) Compressive strength of soil
b) General shape of ground
c) Density of soil
d) Type of soil

Explanation: From a given contour plan, the section along any given direction can be drawn to know the general shape of ground. To use it for earth work calculations for a given communication line in the direction of the section.

2. Which the following is not a use of contour maps?
a) Drawing of plan
b) Determination of intervisibility between two points
c) Tracing of contour gradient and location of route
d) Calculation of resorvoir capacity

Explanation: Contour maps are useful to determine the Determination of intervisibility between two points, tracing of contour gradient and location of route, calculation of resorvoir capacity. It is also useful to draw section.

3. Contour maps are useful to determination of intervisibility between two points.
a) True
b) False

Explanation: Contour maps are useful to the determination of intervisibility between two points. The distance between the triangulation stations are generally several kilometres and therefore selecting their position it is necessary to determine their intervisibilty.

4. Contour map is useful to determine the tracing of contour gradients and the location of route.
a) True
b) False

Explanation: A contour plan is very much useful in locating the route of highway, railway, canal and any other communication lines.

5. Contour maps are used for the measurement of drainage areas.
a) True
b) False

Explanation: A drainage area for a given point in a stream or river can be defined as the area that forms the source of all water that passes that point. A contour plan may be used to trace that line separating the basin from the rest of the area.
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6. Contour maps are used to calculate the reservoir capacity.
a) True
b) False

Explanation: The contour plan may be used to calculate the capacity of a reservoir. Contour maps are also useful to determine the Determination of intervisibility between two points, tracing of contour gradient and location of the route, calculation of reservoir capacity.

7. The line that marks the limits of the drainage area should often follow the ridges.
a) True
b) False

Explanation: The line that marks the limits of the drainage area has the following characteristics it passes through every ridge or saddle that divides the drainage area from other areas. It often follows the ridges.

8. The line that marks the limits of drainage area has the following characteristics it passes through every ridge or saddle that divides the drainage area from other areas.
a) True
b) False

Explanation: The line that marks the limits of drainage area has the following characteristics it passes through every ridge or saddle that divides the drainage area from other areas. It often follows the ridges.

9. The Contour maps are useful to determine the intersection of surfaces and measurements of earthwork.
a) True
b) False

Explanation: The Contour maps are useful to determine the intersection of surfaces and measurements of earthwork. Contour maps are also useful to determine the Determination of intervisibility between two points, tracing of contour gradient and location of the route, calculation of reservoir capacity.

10. The line that marks the limits of the drainage area is always _______ degrees to contour lines.
a) 45
b) 90
c) 180
d) 0

Explanation: The line that marks the limits of drainage area has the following characteristics it passes through every ridge or saddle that divides the drainage area from other areas. It often follows the ridges. It is perpendicular to the contour lines.

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