341. The process of determining the elevation of a point on the ground by comparing it with known elevations is called:
a) Spotting
b) Interpolation
c) Profile leveling
d) Contouring
View Answer
Correct answer: c) Profile leveling
Explanation: Profile leveling involves determining the elevation of a point on the ground by comparing it with known elevations along a line.
342. Which of the following is used to represent a depression on a contour map?
a) Dashed contour lines
b) Solid contour lines
c) Dotted contour lines
d) Contour lines with tick marks
View Answer
Correct answer: a) Dashed contour lines
Explanation: Depressions are represented on a contour map using dashed contour lines with hachure marks or tick marks pointing inward.
343. The vertical distance between two consecutive contour lines is known as the:
a) Contour interval
b) Contour gradient
c) Contour spacing
d) Contour relief
View Answer
Correct answer: a) Contour interval
Explanation: The contour interval represents the vertical distance between two consecutive contour lines on a map.
344. A contour line with a higher elevation always:
a) Crosses all lower contour lines
b) Is closer to other contour lines
c) Forms a closed loop
d) Represents a depression
View Answer
Correct answer: c) Forms a closed loop
Explanation: A contour line with a higher elevation will always form a closed loop on a contour map.
345. Which of the following is NOT a method for obtaining contour data?
a) Photogrammetry
b) LiDAR (Light Detection and Ranging)
c) Total Station surveying
d) Global Positioning System (GPS)
View Answer
Correct answer: c) Total Station surveying
Explanation: Total Station surveying is primarily used for angle and distance measurements and not specifically for obtaining contour data.
346. In contouring, the line joining points of equal elevation is called a:
a) Traverse line
b) Baseline
c) Contour line
d) Grid line
View Answer
Correct answer: c) Contour line
Explanation: Contour lines join points of equal elevation and represent the shape and elevation of the ground surface.
347. Which of the following is used to determine the elevation of a point using a contour map?
a) Planimeter
b) Theodolite
c) Stadia rod
d) Leveling instrument
View Answer
Correct answer: a) Planimeter
Explanation: A planimeter is a mechanical device used to measure the area of irregular shapes on a contour map, which can be used to determine the elevation of a point.
348. When contour lines are close together, it indicates:
a) Flat terrain
b) Steep terrain
c) Gentle slopes
d) Rolling hills
View Answer
Correct answer: b) Steep terrain
Explanation: Closer contour lines indicate steep terrain, while widely spaced contour lines represent gentle slopes.
349. The contour interval is determined based on the:
a) Scale of the map
b) Area of the survey
c) Accuracy requirements
d) Topographic features
View Answer
Correct answer: d) Topographic features
Explanation: The contour interval is determined based on the topographic features of the area being surveyed, such as the variation in elevation and terrain.
350. Which of the following is a characteristic of index contours?
a) They are labeled with their elevation values
b) They are spaced closer together than intermediate contours
c) They are always dashed lines
d) They represent depressions
View Answer
Correct answer: a) They are labeled with their elevation values
Explanation: Index contours are labeled with their elevation values to provide reference points on the map.
