331. In contouring, the process of “spotting” refers to:
a) Marking elevation points on the ground
b) Drawing contour lines on a map
c) Estimating elevations between known points
d) Identifying benchmark locations
View Answer
Correct answer: a) Marking elevation points on the ground
Explanation: Spotting in contouring refers to the process of marking elevation points on the ground using leveling rods or other instruments.
332. What is the purpose of a contour map?
a) To navigate through an area
b) To display property boundaries
c) To analyze drainage patterns
d) To depict the location of roads
View Answer
Correct answer: c) To analyze drainage patterns
Explanation: A contour map is used to analyze drainage patterns, identify landforms, and understand the topography of an area.
333. Which of the following statements is true about contour lines?
a) Contour lines never cross each other
b) Contour lines represent horizontal distances
c) Contour lines are always straight and parallel
d) Contour lines connect points of equal elevation
View Answer
Correct answer: d) Contour lines connect points of equal elevation
Explanation: Contour lines connect points of equal elevation on the ground and allow for the visualization of the three-dimensional surface on a two-dimensional map.
334. What is the relationship between contour lines and slope steepness?
a) Closer contour lines indicate steeper slopes
b) Denser contour lines indicate gentler slopes
c) Contour lines have no relationship with slope steepness
d) Contour lines only represent elevation, not slope
View Answer
Correct answer: a) Closer contour lines indicate steeper slopes
Explanation: Closer contour lines on a map indicate steeper slopes, while more widely spaced contour lines represent gentler slopes.
335. What is the purpose of a contour interval?
a) To measure horizontal distances
b) To determine the direction of flow
c) To calculate the slope of a hill
d) To represent vertical distances between contour lines
View Answer
Correct answer: d) To represent vertical distances between contour lines
Explanation: The contour interval represents the vertical distance between contour lines on a map and provides information about changes in elevation.
336. Which of the following techniques is used for detailed contouring of small areas?
a) Grid surveying
b) Photogrammetry
c) Remote sensing
d) Trilateration
View Answer
Correct answer: a) Grid surveying
Explanation: Grid surveying involves establishing a network of closely spaced control points to capture detailed elevation data for small areas.
337. When contour lines form closed loops, it indicates the presence of:
a) Valleys
b) Hills
c) Plateaus
d) Ridges
View Answer
Correct answer: c) Plateaus
Explanation: Contour lines that form closed loops on a map indicate the presence of plateaus or flat areas of relatively high elevation.
338. Which of the following statements about contour lines is false?
a) Contour lines can never cross each other
b) Contour lines can form closed loops
c) Contour lines can represent depressions
d) Contour lines can have different elevations
View Answer
Correct answer: a) Contour lines can never cross each other
Explanation: Contour lines can cross each other when representing overhanging cliffs or vertical changes in elevation.
339. The process of connecting contour lines of different elevations to form a continuous surface is known as:
a) Contour integration
b) Contour blending
c) Contour closure
d) Contouring
View Answer
Correct answer: d) Contouring
Explanation: Contouring involves connecting contour lines of different elevations to create a continuous representation of the ground surface.
340. Which of the following is an advantage of digital contouring techniques over traditional manual methods?
a) Higher accuracy
b) Lower cost
c) Faster processing time
d) Improved visualization
View Answer
Correct answer: c) Faster processing time
Explanation: Digital contouring techniques, such as using GIS software, allow for faster processing and analysis of contour data compared to traditional manual methods.
