East Bay Municipal Utility District. Study Guide for Survey Technician I

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1 East Bay Municipal Utility District Study Guide for Survey Technician I Summer 2018

2 TABLE OF CONTENTS PAGE Introduction... 1 Scoring... 1 Visual Perception... 2 Sample Questions Reading and Interpreting Maps, Construction Drawings and Charts... 3 Sample Questions Surveying Principles... 4 Sample Question Surveying Mathematics... 5 Sample Questions Answers to Sample Questions... 6 ATTACHMENTS A...Service Tap Map B... Service Tap Map Symbols C... Topographical Map

3 INTRODUCTION The purpose of this study guide is to familiarize you with the scope of surveying to be covered by the written exam. This study guide will define a few surveying principles, explain some of the knowledge and skills a candidate is expected to demonstrate and provide sample questions in these areas. Some of the questions on the written exam are based on the information contained in the study guide. The Survey Technician I written exam will cover the following areas: Visual Perception Reading and Interpreting Maps, Construction Drawings and Charts Surveying Principles Surveying Mathematics 15 items 40 items 10 items 35 items Scoring The Survey Technician I written exam will consist of 100 Agree/Disagree items. You will be given a scantron answer sheet to respond to the items. On each item, you will choose A if you agree with the statement or B if you disagree. You should not guess on any of the items on the written exam because your score will be the number of questions you answer correctly. No credit will be given or taken away for questions you do not answer. Because there is only one current vacancy and this is a competitive process, it is to your advantage to prepare and achieve as high a score as possible on the Survey Technician I written examination. Page 1

4 VISUAL PERCEPTION A Survey Technician I must be able to read calibrated graduations on various survey instruments. The following two examples refer to an arrow on a line similar to what would be encountered in reading a leveling rod. You will be given two numbered positions on the line which will always be exactly 10 units apart. The following statements give the number to which the arrow is pointing if the position were marked. You are to decide whether you agree or disagree with the given reading. NOTE: The correct answer will always be a whole number. 1. The arrow is pointing to 25. Choose A if you agree or B if you disagree The arrow is pointing to 298. Choose A if you agree or B if you disagree Page 2

5 READING AND INTERPRETING MAPS, CONSTRUCTION DRAWINGS AND CHARTS A Survey Technician I must be able to read and interpret maps, construction drawings and charts. The following example refers to the service tap map and the symbol sheet (ATTACHMENTS A and B). 3. The pipe installed on Vallejo Avenue, south of Mahoney Street is 8" cast iron, mortar lined and cement coated, installed in (Assume top is North.) Choose A if you agree or B if you disagree. 4. The tap at 332 Pinole Avenue is 2". Choose A if you agree or B if you disagree. (The following refers to the topographic map provided (ATTACHMENT C).) A topographic map shows the configuration of the earth's surface including such features as hills and valleys. It shows elevations from above, being a top view rather than a side view. A contour is an imaginary line of constant elevation on the ground surface. A contour line on the map joins ground points of equal elevation. The bold, solid contour lines state the elevation of the ground points on that contour line. For example, the solid contour line labeled "700" means the ground points on that contour line are 700 feet above sea level. Between the solid labeled contour lines are unlabeled contour lines. These lines are drawn at equal elevation intervals, and their elevation can be determined by referring to the labeled solid contour line. 5. The existing ground elevation at the 36" redwood is 692 feet. Page 3

6 SURVEYING PRINCIPLES A Survey Technician I must be able to learn basic surveying principles and practices. The term "bearing" means: the direction of any line indicated by the quadrant in which the line falls and the acute angle which the line makes with the north-south line in that quadrant. The angle of a bearing will measure between 0 and 90. For example, in the figure at the right, line AB has a bearing of N 45 W. The term "azimuth" means: the direction of any line measured in a clockwise direction from north. For example, in the figure at the right, line AB has an azimuth of If the compass bearing of line XY is S 38 o E, the azimuth of XY from north is 128. Choose A if you agree or B if you disagree. Points on survey lines are called stations. The start of a survey line is marked as The station 100 feet from the starting point is marked ; the point an additional 100 feet would be marked as ; fifty additional feet would be marked as ; and an additional half foot would be shown as The station mark on a stake thirty-five hundred forty-two and fifty hundredths feet from the starting point should be Choose A if you agree or B if you disagree. Page 4

7 SURVEYING MATHEMATICS A Survey Technician I must make arithmetic, geometric and trigonometric calculations quickly and accurately. 8. The depth of a reservoir is 32 feet. If the sides have a slope of 1¾:1 and the bottom is 175' across from toe to toe, the distance between the tops of the sides is 231 feet. 9. The tangent of an angle multiplied by the cotangent of an angle is one. 10. If 7/8 inch on a map represents an actual distance of 42 miles, 7/10 inch on the map represents 33.6 miles. Page 5

8 ANSWERS TO SAMPLE QUESTIONS 1. A. The arrow must point to a position which, if marked, would correspond to a number greater than 20. The given numbers increase from left to right, and the arrow is to the right of 20. The distance from 20 to the arrow is exactly half the distance as that from 10 to 20. Therefore, the arrow points to a position where 25 would be if it were marked. 2. B. The arrow must point to a position which, if marked, would be 2/10 the distance from 300 to 290. The arrow is actually approximately 3/10 the distance. 3. B. The pipe is labeled 6CM46, meaning 6" pipe, cast iron, mortar lined, not coated, installed in B. Because the tap size is omitted, it is 3/4" or under. 5. B. The 36" redwood is on the 694 foot contour line. 6. B. The azimuth is measured from due North. In this case, the bearing is measured from due South = A. 8. B. 32' x 1¾ = 56' x 2 [2 sides] = 112' + 175' = 287 feet. 9. A. The cotangent is the inverse of the tangent function. 10. A. If 7/8x = 42, then x = 48. 7/10 x 48 = Page 6

PRE-LAB for: Introduction to Aerial Photographs and Topographic maps (Ch. 3)

GEOLOGY 306 Laboratory Instructor: TERRY J. BOROUGHS NAME: PRE-LAB for: Introduction to Aerial Photographs and Topographic maps (Ch. 3) For this assignment you will require: a calculator and metric ruler.