# Surveying Questions and Answers – Plane Table Surveying – Graphic Triangulation

This set of Surveying Multiple Choice Questions & Answers (MCQs) focuses on “Plane Table Surveying – Graphic Triangulation”.

1. Which among the following is not a method of plane table surveying?
b) Trisection
c) Intersection
d) Resection

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.
a) True
b) False

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?
b) Intersection
c) Resection
d) Traversing

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 a 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?
a) Intersection
b) Resection
c) Traversing

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 the minimal effort.
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6. Which of the following set indicates the location of details of the survey?
a) Resection, 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 involve the location of plane table stations.

7. Method of intersection is also known as _____________
a) Resection
b) Graphical triangulation
d) Traversing

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 _________
a) Trisection
c) Intersection
d) Resection

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.
a) True
b) False

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 the 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 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.

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