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Civil Engineering Objective Questions { Surveying }



92.  Plotting of inaccessible points on a plane table, is done by
A. intersection
B. traversing
C. radiation
D. none of these.
Discussion
93. Locating the position of a plane table station with reference to three known points, is known as
A. intersection method
B. radiation method
C. resection method
D. three point problem.
Discussion
94. The 'fix' of a plane table from three known points, is good, if
A. middle station is nearest
B. middle station is farthest
C. either the right or left station is nearest
D. none of these.
Discussion
95. The 'fix' of a plane table station with three known points, is bad if the plane table station lies
A. in the great triangle
B. outside the great triangle
C. on the circumference of the circumscribing circle
D. none of these.
Discussion
96. One of the Lehmann's rules of plane tabling, is
A. location of the instrument station is always distant from each of the three rays from the known points in proportion to their distances
B. when looking in the direction of each of the given points, the instrument station will be on the right side of one and left side of the other ray
C. when the instrument station is outside the circumscribing circle its location is always on the opposite side of the ray to the most distant point as the intersection of the other two rays
D. none of these.
Discussion
97. For orientation of a plane table with three points A, B and C, Bessel's drill is
A. Align b through a and draw a ray towards c, align a through b and draw a ray towards c, finally align c through the point of intersection of the previously drawn rays
B. Align c through a and draw a ray towards b, align a through c and draw a ray towards b, finally align b through the point of intersection of the previously drawn rays
C. Align c through b and draw a ray towards a, align b through c and draw a ray towards a, finally align a, through the point of intersection of the previously, drawn rays
D. In the first two steps any two of the points may be used and a ray drawn towards the third point, which is sighted through the point of intersection of previously drawn rays in the final step.
Discussion
98. To orient a plane table at a point with two inaccessible points, the method generally adopted, is
A. intersection
B. resection
C. radiation
D. two point problem.
Discussion

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