Discuss the role of the bill of materials.

What will be an ideal response?


The bill of materials (BOM) for a device is not an actual drawing, but rather a text list of its parts, subassemblies, and subassembly parts. The BOM, which can appear on any one of the assembly drawings or as a separate drawing or document, is used mainly by a fabricator to check that all of the drawings and materials needed to make the device are available. Commercial parts are also included on this list. Although not a drawing, a BOM is usually printed as a table on an assembly drawing to emphasize that this list is considered a member of the set of drawings for the device. The BOM is often included as part of the layout or assembly drawing.

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The difference between an SCR and a diode is that an SCR _____.

a. has three terminals b. is bidirectional c. has a drain connected to the negative terminal d. is normally open

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In every stage of a construction project, documents must be updated, controlled, maintained, and _____.

a. planned b. archived c. processed d. computerized

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Find, in square feet, the area of the floor of a room that measures 22'-0" by 16'-0" on a blueprint.

What will be an ideal response?

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The ____ has no moving parts, is resistant to shock and vibration, and is sealed against dirt and moisture.

a. mechanical relay b. solid-state relay c. optical relay d. hybrid relay

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