This set of Surveying Multiple Choice Questions & Answers (MCQs) focuses on “Graphic Triangulation”.
1. Which among the following is not a method of plane table surveying?
Explanation: The methods which are adopted in case of plane table surveying involve radiation, Intersection, resection and traversing, which are used based on the type of output required.
2. The method of radiation is used when distances are small.
Explanation: In the method of radiation, a ray is drawn from the instrument station towards the point, the distance is measured between the instrument station and that point by which, the point is located. This method is more suitable when the distances are small.
3. Method of Intersection is used when_____________
a) Distance between point and instrument is very small
b) Distance between point and instrument is infinity
c) Distance between point and instrument is small
d) Distance between point and instrument is large
Explanation: Method of intersection is used when the distance between the point and the instrument station is either too large or cannot be measured accurately due to some conditions. The location of an object is determined by sighting the object from two plane table stations.
4. Which of the following methods required two instrument stations?
Explanation: The location of an object is determined by sighting the object from two plane table stations and drawing the rays. The intersection of these rays will give position of the object, because of this it is essential to have at least two instrument stations for locating any point.
5. Which among the following methods of plane table is most commonly used?
Explanation: The method of intersection usually involves locating a station point and marking the remaining points, followed by changing the instrument to another point and computing the remaining points from which the required distance between the points can be found out with minimal effort.
6. Which of the following set indicates the location of details of survey?
a) Resection, intersection
b) Radiation, resection
c) Radiation, intersection
d) Traversing, resection
Explanation: The methods radiation and intersection usually involves collecting or locating the required details which accessed for computing the survey. Traversing and resection involves the location of plane table stations.
7. Method of intersection is also known as______________
b) Graphical triangulation
Explanation: Method of intersection is also known as graphical triangulation because it involves the formation of triangles in computed traverse and moreover this process is a graphical method.
8. The process of determining the plotted position of the station occupied by the plane table is known as__________
Explanation: By the resection process, the plane table station points are located in which they are taken as reference for locating the remaining points of the traverse.
9. Orientation might cause a huge problem in method of resection.
Explanation: If the table is not correctly oriented at the station in the method of resection, the intersection of the two resectors will not give the correct location of the station. The problem, therefore, lies in orienting table at the stations.
10. The observations made in method of traversing can be used as___________
a) Bisecting point
b) Traverse point
c) Instrument stations
d) Survey point
Explanation: The main difference in between method of traversing and method of radiation is that in the case of radiation the observations are taken to those points which are to be detailed while in the case of traversing the observations are made to those points which will be subsequently used as instrument stations.
Sanfoundry Global Education & Learning Series – Surveying.
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