This set of Surveying Multiple Choice Questions & Answers (MCQs) focuses on “Contour Gradient”.

1. _______ is a line lying throughout on the surface of the ground and preserving a constant inclination to the horizontal.
b) Contour interval
c) Contour slope
d) Contour inclination

Explanation: Contour gradient is a line lying throughout on the surface of the ground and preserving a constant inclination to the horizontal. If the inclination of such a line is given, its direction from a point may be easily located either on the map or on the ground.

2. Which of the following cannot be used to locate the contour gradient in the field?
a) Clinometer
b) Theodolite
c) Level
d) Chain

Explanation: The method of locating the contour gradient on the map can be done in the filed by using clinometer, theodolite and level.

3. If a level is used to locate the contour gradient, it is not necessary to set the level on the contour gradient.
a) True
b) False

Explanation: Contour gradient is a line lying throughout on the surface of the ground and preserving a constant inclination to the horizontal. If a level is used to locate the contour gradient, it is not necessary to set the level on the contour gradient.

4. If the inclination of contour gradient is given, its direction from a point may be easily located either on the map or on the ground.
a) True
b) False

Explanation: Contour gradient is a line lying throughout on the surface of the ground and preserving a constant inclination to the horizontal. If the inclination of such a line is given, its direction from a point may be easily located either on the map or on the ground.

5. To locate the contour gradient, the level is set at a commanding position and reading on the staff at the second point is taken.
a) True
b) False

Explanation: To locate the contour gradient, the level is set at a commanding position and reading on the staff at the first point is taken.
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6. From a single instrument station, several points at a given gradient can be located.
a) True
b) False

Explanation: To locate the contour gradient, the level is set at a commanding position and reading on the staff at the first point is taken. From a single instrument station, several points at a given gradient can be located.

7. In a direct method, the contour to be plotted is actually traced on the ground.
a) True
b) False

Explanation: In a direct method, the contour to be plotted is actually traced on the ground. Only those points are surveyed which happen to be plotted.

8. In indirect method, each contour is located by determining the positions of a series of points through which the contour passes.
a) True
b) False

Explanation: In indirect method, each contour is located by determining the positions of series of points through which the contour passes. The operation is also sometimes called tracing out contours.

9. The indirect method, guide points need not necessarily be on the contours.
a) True
b) False

Explanation: In indirect method, some suitable guide points are selected and surveyed. The guide points need not necessarily be on the contours.

10. The indirect method serves as a basis for the interpolation of contours.
a) True
b) False

Explanation: In indirect method, some suitable guide points are selected and surveyed. These guide points, having been plotted, serve as a basis for the interpolation of contours.

Sanfoundry Global Education & Learning Series – Surveying.

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