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ASSIGNMENT QUESTIONS - 14069_739
ASSIGNMENT QUESTIONS - 14069_741

Engineering Aid 3 - Beginning Structural engineering guide book
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10-16. What is the approximate true bearing of the object if the local declination is 10°w and the local attraction  is  20°E? 1. S80°W 2. S100°W 3. N80°W 4. N100°E 10-17. What method should you use to correct or convert a compass azimuth reading to a true azimuth reading when both local attraction and local declination are easterly? 1. Subtract the attraction and declination  from  the  compass reading 2. Add the attraction and declination  to  the  compass reading 3. Add the attraction to the compass  reading,  then  subtract the declination from the sum 4. Add the declination to the compass  reading,  then  subtract the attraction from the sum 10-18. When making a closed traverse compass-tape  survey,  for  what reason should you first read and record the back bearing of a traverse line from the first setup point? 1. To offset local attraction 2. To get rid of declination 3. To check the accuracy of your compass 4. To verify the last bearing you will take IN  ANSWERING  QUESTION  10-19,  REFER  TO FIGURE 13-8 IN YOUR TEXTBOOK. 10-19. Suppose  that  in  the  compass-tape survey  field  notes  shown,  the bearing AE is different from the bearing EA. This  difference  could have resulted from which of the following  conditions? 1. Inaccuracy  in  reading  the  back bearing 2. Inaccuracy  in  reading  the forward  bearing 3. The difference in the strength of the local attractions at A and E 4. Each of the above 10-20. Station A bears N70°E (true) from station B and station C bears S10°W (true) from station B. What size of angle should be entered in the   “computed  interior  angle” column of a compass-tape survey notebook page alongside the forward  bearing  of  station  C? 1. 60° 2. 80° 3. 120° 4. 240° 10-21. What is the sum of the interior angles in a closed traverse consisting  of  six  traverse  lines? 1. 360° 2. 540° 3. 720° 4. 1,080° 10-22. If a compass is in error when you are taking bearings at several different places and each error varies from the preceding one, the errors are probably due to which of  the  following  factors? 1. A shifted movable circle 2. A bent frame 3. A bent pivot 4. A bent needle 10-23. The only compass available for taking  bearings  has  an  instrument error. What forward bearing should you use when the compass needle  indicates  a  forward  bearing of N22°W and a back bearing of S24°E? 1. S2°E 2. S46°W 3. N46°E 4. N23°W 10-24. You are using a compass that has an instrument error and is graduated  for  azimuths. What forward  azimuth  should  you  record when  the  compass  needle  indicates a forward azimuth of 37° and a back azimuth of 219°? 1. 37° 2. 38° 3. 91° 4. 128° 68







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