61. The radius of a curve being given, and angle of intersection of
the two tangents, how do you find the length of the tangent from their
intersection to the beginning of the curve?
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?
73. Suppose a beam supported at both ends, and take w = weight, l =
length of beam, b = breadth, d = depth, s = breaking weight. Express
algebraically the value of s in terms of the other quantities.
74. Sectional area being 36 square inches, which would be the stronger
section, 6 by 6 or 4 by 9?
75.
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