Drip edge flashings are installed at eave and rake of a steep roof. Which material are they made of?
What will be an ideal response?
Galvanized steel or stainless steel, aluminum or copper.
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The light striking a pane of glass is refracted as shown in Figure 4.20. The law of refraction states that na sin ?a = nb sin ?b, where na and nb are the refractive indexes of the materi-als through which the light is passing and the angles are from a line that is normal to the surface. The refractive index of air is 1.00. What is the refractive index of the glass?
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Describe the purpose of a leaf-spring shackle. ?
What will be an ideal response?
One volt is developed by cutting ____________________ million magnetic lines of force in one second.
Fill in the blank(s) with the appropriate word(s).
The three main types shaft misalignment are parallel, angular, and __________
A. horizontal. B. vertical. C. combination horizontal and vertical. D. combination angular and parallel.