2-17.Which of the following considera-2-18.2-19.2-20.2-21.tions must be made when selectingstations for triangulation?1.Ease of signal erection2.Size of the angles to be turned3.Transit time between instrumentsetups4.Direction of the sightingsAfter the stations have beenselected and you begin to erectthe towers, what must you considerregarding the targets?1.How to light2.The size3.Color contrast of the targetand background4.Both 2 and 3 aboveWhen you are using a 1-minuteh o w m a n y t i m e s m u stthe angles be repeated to obtainthird-order precision?1. 202. 123. 34. 6To compute the coordinates oftriangulation stations, you musthave what data?1.Latitude and departure of thepoint of origin2.The true meridian and azimuthsfor all lines3.Latitude and departure of thelines between the stations4.All of the aboveYou have measured a few tapeintervals in a base line and thetape doesn’t quite reach the metalstrip on the buck. The headchainman measures the distance thechain must be set (a) in whatdirection? He then records thisinformation in the field book and(b) takes what action concerningthe measurement?1. (a) Forward(b) adds the measurementto the tape length2. (a) Forward(b) subtracts the measurementfrom the tape length3. (a) Back(b) adds the measurement tothe tape length4. (a) Back(b) subtracts the measurementfrom the tape length2-22.2-23.Figure adjustment uses what datafor adjustment?1.The sum of the exterior angles2.The sum of the interior angles3.The Pythagorean theory4.The 360° theoryWhen adjusting a chain oftriangles, what type of adjustmentshould you perform first?1.Figure2.Station3.Side4.Log-sineFigure 2BIN ANSWERING QUESTIONS 2-24 THROUGH 2-28,USE THE QUADRILATERAL AND ANGLE VALUESSHOWN IN FIGURE 2B.2-24.After point A is adjusted by thestation adjustment method, whatis the corrected value angle 1?1.30°59'07"2.30°59'05"3.30°57'08"4.30°57'07"10