Civil Engineering (CE) Exam > Civil Engineering (CE) Questions > Select the correct statement.a)A contour is n...
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Select the correct statement.
- a)A contour is not necessarily a closed curve.
- b)A controu represents a ridge line if the concave side of lower value contour lies towards the higher value contour
- c)All Options are correct
- d)Two contours of different elevations do no cross each other except in case of an over hanging cliff.
Correct answer is option 'C'. Can you explain this answer?
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Select the correct statement.a)A contour is not necessarily a closed c...
Explanation:
A contour is not necessarily a closed curve: Contours can be both closed curves (such as circles or closed loops) or open curves (such as lines). Contours represent lines of constant value (elevation, temperature, etc.) on a map or a surface, and they can be open or closed depending on the terrain or feature being represented.
A contour represents a ridge line if the concave side of lower value contour lies towards the higher value contour: This statement is correct. In topographic maps, contour lines are used to represent different elevations. When a contour line curves inwards (concave) toward a higher elevation, it indicates a ridge line.
Two contours of different elevations do not cross each other except in the case of an overhanging cliff: This statement is also correct. Contour lines represent lines of constant elevation, and they never intersect or cross each other unless there is an overhanging cliff or an error in the map representation. Contour lines that cross would indicate conflicting elevations, which is not possible in a proper representation.
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Select the correct statement.a)A contour is not necessarily a closed c...
Contour and its properties
Contour: A contour is a line joining the points of equal elevation on a map. Contours are used to represent the shape of the land surface in two dimensions.
Properties of Contour:
a) A contour is not necessarily a closed curve: A contour may or may not be a closed curve. A closed contour represents a hill or a depression, whereas an open contour represents a ridge or a valley.
b) A contour represents a ridge line if the concave side of lower value contour lies towards the higher value contour: If the concave side of a lower value contour lies towards a higher value contour, it represents a ridge.
c) Two contours of different elevations do not cross each other except in the case of an overhanging cliff: Two contours of different elevations do not cross each other, as it would imply that a point has two different elevations. The only exception to this is in the case of an overhanging cliff, where a contour of higher elevation crosses over a contour of lower elevation.
Therefore, the correct statement is option 'C'.
Contour: A contour is a line joining the points of equal elevation on a map. Contours are used to represent the shape of the land surface in two dimensions.
Properties of Contour:
a) A contour is not necessarily a closed curve: A contour may or may not be a closed curve. A closed contour represents a hill or a depression, whereas an open contour represents a ridge or a valley.
b) A contour represents a ridge line if the concave side of lower value contour lies towards the higher value contour: If the concave side of a lower value contour lies towards a higher value contour, it represents a ridge.
c) Two contours of different elevations do not cross each other except in the case of an overhanging cliff: Two contours of different elevations do not cross each other, as it would imply that a point has two different elevations. The only exception to this is in the case of an overhanging cliff, where a contour of higher elevation crosses over a contour of lower elevation.
Therefore, the correct statement is option 'C'.
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Select the correct statement.a)A contour is not necessarily a closed curve.b)A controu represents a ridge line if the concave side of lower value contour lies towards the higher value contourc)All Options are correctd)Two contours of different elevations do no cross each other except in case of an over hanging cliff.Correct answer is option 'C'. Can you explain this answer?
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