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UPSC Civil Service Exam Questions - Engineering

Q1:

In a plane table survey, the plane table station position was to be fixed with respect to three reference points. It was found that one of the reference points was not visible due to some obstruction. It was, therefore decided to make use of the other two points only. Which one of the following statements is true regarding the determination of station position ?

A The work can be done faster.

B Two settings of the plane table will be needed but the work will be accurate.

C Only one setting of the table is needed, however the work will be less accurate.

D The work will be less accurate and time consuming.

ANS:B - Two settings of the plane table will be needed but the work will be accurate.

Answer should be D, as two point problem is less accurate and more time time consuming as compared to three point problem.