A built-up roof (BUR) membrane consists of several plies of felt, where each successive felt is laid over a mopping of asphalt. What does the felt consist of and what is its purpose? What purpose does asphalt serve?

What will be an ideal response?


Asphalt in a BUR ply is the waterproofing agent. However, asphalt (even in its solid state) has hardly any tensile strength. The felt, which consists of glass fibers woven into a mat, functions as reinforcement, providing the required tensile strength.

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In CADD, general notes can be typed and stored as a ____ and reused on future foundation plans.

A. block B. plot C. layer D. table

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The most efficient lighting systems will use which of the following features? Select all that apply.

A) LED fixtures. B) Daylight controls. C) Uniform lighting for the entire task plane. D) Direct T-8 fluorescent fixtures. E) All of the above.

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In this type of machining, an electron beam generated by a heated tungsten filament is used to cut very accurate features into a part.

a. electrochemical machining (ECM) b. electrodischarge machining (EDM) c. electron beam (EB) d. ultrasonic machining

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____________________ rings are sometimes installed in a groove to locate or limit movement of a part on a shaft.

Fill in the blank(s) with the appropriate word(s).

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