Figure    10F IN  ANSWERING  QUESTIONS  10-43  THROUGH 10-46, REFER TO FIGURE 10F. YOU ARE RUNNING THE LINE AE AND THE POWERHOUSE IS IN  YOUR  WAY. WHILE AT SETUP B, YOU Discovered  THAT  A  30-DEGREE  DEFLECTION ANGLE  WILL  CLEAR  THE  OBSTACLE. YOU DECIDED TO USE THIS ANGLE TO BYPASS THE POWERHOUSE. 10-43. What is your next step after recording the deflection angle at B? 1. Take a backsight at A and measure angle ABC 2. Move the instrument to D and measure the deflection angle at D 3. Move the instrument to C and measure the deflection angle at C 4. Move the instrument to A and measure angle BAC 10-44. If you use the angle offset method of  bypassing  an  obstacle,  what  is the size of the deflection angle at C? 1. 30° 2. 45° 3. 60° 4. 75° 10-45. Which of the following distances is equal to CD? 1.   AB 2.   BD 3.   DE 4.   BC 10-46. What is the deflection angle at point D? 1. 30°L 2. 30°R 3. 60°L 4. 60°R 10-47. The angle offset and the perpendicular offset methods are useful in establishing a survey line  under  which  of  the  following conditions? 1. 2. 3. 4. When the length of the survey line  cannot  be  determined  by chaining When the slope becomes great enough to require breaking chain When the line of sight on the chosen survey line is obstructed When  the  backsiqht  distance  is much less than the foresight distance 10-48. The “balancing in” process should be used to locate an intermediate point between two control points on a survey line under which of the  following  conditions? 1. 2. 3. 4. When the distances from the intermediate point to the control points are approximately   equal When neither control point is visible from the other, and the other methods of bypassing an obstacle cannot be used When the intermediate point is much closer to one of the control points than it is to the  other When the instrument adjustment has a known error 71