Planning & EstimatingQuestion 296 of 360
In a plumbing isometric drawing, pipes are drawn at what angle to represent the three dimensions on a flat sheet?
a.Typically at 30-degree angles to show horizontal runs, with verticals drawn straight up
b.All lines at 90 degrees only
c.Random angles chosen by the drafter
d.Curved lines throughout
Explanation
Plumbing isometrics conventionally draw horizontal piping at 30-degree angles and vertical piping straight up, giving a 3-D view on a 2-D sheet. This lets you see rises, drops, and offsets that a plan view flattens. Reading isometrics correctly is essential for counting vertical fittings and understanding connection order.
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