IN  ANSWERING  QUESTION  9-46,  REFER  TO FIGURE 12-18 IN YOUR TEXTBOOK. 9-46. Assume that you are laying out a 9-47. 9-48. 9-49. right angle,   but you are using a 50-foot  tape  instead  of  a  100-foot tape, and the distance from D to C is 15 feet. You then set the tape with its 0-foot end on D and its 50-foot end on C. Your  50-foot tape will form two legs of a right triangle if the man running out the bight draws the tape taut while holding  the  25-foot  mark  in  contact with  what  other  mark? 1. 20-ft  mark 2. 30-ft  mark 3. 35-ft mark 4. 40-ft  mark Computing the size of an angle by the  chord  method  involves  the partial solution of a triangle in which the only known values are which of the following measurements? 1. The sizes of two angles 2. The lengths of the sides 3. The sizes of two angles and length of one side 4. The lengths of two sides and the size of one angle What method of computing the size of an angle X involves the partial solution  of  a  right  triangle  in which X is an acute angle and two sides of the triangle (the side opposite X and the side adjacent to X)  are  measured? 1. Chord  method 2. Sine  method 3. Tangent method 4. Sum of squares method Reading a tape upside down and obtaining, for  example,  69  instead of 96 and leaving out an entire tape  length  are  samples  of 1. natural  errors 2. instrumental errors 3. personal  errors 4. mistakes 9-50. Concerning the care of steel tapes, three  of  the  following  statements represent  correct  guidelines. Which one does NOT? 9-51. 9-52. 1. 2. 3. 4. Whenever a tape is laid across a  gravel  road,  all  drivers should be warned to slow their vehicles down before crossing over the tape While dragging the tape, the head chainman should not ask someone else to help by picking up the free end When given a choice between a tape which has a kink and one which does not, you should use the  undamaged  one  when  possible When dragging a tape, keep it straight In  caring  for  and  maintaining  his steel  tapes,    a  chainman  should  make it a practice to take which of the following  steps? 1. Inspect all tapes weekly 2. Wipe  them  dry  before  storing them 3. Coat them from time to time with  light  rust-resistant  oil 4. All of the above Listed are the steps for splicinq a broken steel tape. Identify the proper  sequence. A. Align and rivet the repair stock at one end of the break. B. Insert one rivet at a time and arrange rivets in a triangular pattern. c. Place the repair stock on the face of the other section of the  tape,   using the calibration section as a measure for the break  splice. D. Use a three-edge file to partially cut through the surplus stock. 1. A, B, C, D 2. A, C, B, D 3. C, A, B, D 4. C, B, A, C 63