Chapter 8 Building Layout 35 Copyright Goodheart-Willcox Co., Inc. May not be reproduced or posted to a publicly accessible website. Name ________________________________________________________________ 13. _____ When sighting through the telescope of a leveling instrument, it is recommended that _____. A. one eye be kept closed B. both eyes be kept open C. safety goggles are worn D. the instrument is placed facing away from sunlight 14. How many minutes are in a complete circle? How many seconds are in an angle of 15°? Use the space provided for calculations. A. Minutes:____________________________________ B. Seconds:____________________________________ 15. The vernier scale is used to lay out or measure angles that include fractions of a degree. What is the exact angle shown? _ ________________________________________________________ David White 16. An officially established reference point that can be used for all elevations on the building is called a(n) _____. _ _________________________________________________________________________________________________________________ 17. In situations where the existing grade will not permit the setting of a stake or reference mark at the actual level of the grade, the letters C and F are used to indicate how much _____ to add or remove. _ _________________________________________________________________________________________________________________ 18. _____ The _____ is more accurate than the builder’s level at lining up stakes, fence posts, poles, and roadways. A. laser lever B. transit C. tape measure D. plumb bob 19. Give two reasons why total stations are only used on large construction projects. _ __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________ 80 70 60 30 45 60 15015 4530 60 50 40 30 90 80 70 60 5 0