Scientific American Supplement, No. 561, October 2, 1886 by Various
page 61 of 163 (37%)
page 61 of 163 (37%)
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62. Describe an engineer's transit, and name its adjustments. 63. Describe a Y level, and name its adjustments. 64. How many kinds of leveling rods do you know of? 65. State how they are graduated, and how they can be read to the 1/1000 of a foot. 66. Show a form of field-book for transit notes used when "running" curves, and place thereon notes of a 5 deg. curve for 1,000, with two intermediate "set-ups." 67. Show a form of level-book, and place therein sufficient figures to show your method. 68. What are cross-sections? 69. How do you set slope stakes for excavation and embankment? 70. What is a grade line? 71. What proportion of the breaking weight of a beam would you consider a safe load? 72. With the load uniformly distributed, what fractional part of the whole weight may be considered, in all calculations, as being carried at the center? |
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