L15_1 - Multiview Projections 2 GE101 Engineering Graphics...

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    Multiview Projections 2 GE101 Engineering Graphics and  Design
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    First and Third-Angle Projection
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    Third-Angle Projection Used in the United States to determine  arrangement of multiviews Views projected onto projection plane in front  of object
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    First-Angle Projection Used in Europe and Asia to determine  arrangement of multiviews Views projected onto projection plane behind  object
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    View Selection Most descriptive view selected as the front view Longest dimension should appear in front view as a  horizontal dimension Use minimum number of views that completely describe  object Choose views to minimize number of hidden lines
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    Simple Part - Two Views Required
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    Simple Part – One View Required
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    Line Precedence 1. Visible 2. Hidden 3. Center When lines coincide with each other, more  important lines take precedence over other lines.  The order of precedence is: 
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