For each part manufactured in the lab, what is required for part drawings?

• A. FULLY DIMENSIONED, APPROPRIATELY TOLERANCED DRAWING
• B. A ROUGH SKETCH IS SUFFICIENT
• C. ONLY ONE CRITICAL DIMENSION IS REQUIRED
• D. NO DRAWING REQUIRED

Answer: (A)

The essential idea is that every part made in the lab needs a drawing that clearly communicates exactly what to make and how well it must be made. A fully dimensioned, appropriately tolerranced drawing provides all the required measurements, feature locations, and tolerance zones so the machinist can reproduce the part and the inspector can verify it against the design. Without explicit dimensions and tolerances, a rough sketch leaves interpretation up to guesswork, which can lead to parts that don’t fit or function correctly. Focusing on just one critical dimension ignores other features that also affect fit, function, and manufacturability. And having no drawing at all opens the door to miscommunication and inconsistent results.