SECTIONS - Chapter 14
Recognize and/or be able to draw detail sections: full, half, revolved, removed, broken-out, and offset. Recognize and/or be able to draw an assembly section and know the differences required of different parts: patterns and directions of cross-hatching, parts NOT cross-hatched (bolts, nuts, screws, washers, pins, keys, shafts, etc.). Recognize conventional practices for not cross-hatching thin cross sections, and revolutions of ribs, spokes, webs, etc. to TRUE POSITIONS, not true projections. Recognize and/or be able to draw conventional breaks.
DIMENSIONING - Chapter 15
Know how to place dimensions for linear elements and cylindrical elements - group dimensions on characteristic view, dimension positive cylinders on non-circular view and negative cylinders on circular view. Location dimensions should tie finished surfaces to finished surfaces, center lines to finished surfaces, or center lines to center lines. Fillets and rounds may be dimensioned or specified in a note if several are the same size.
Order of dimensioning:
TOLERANCES - Chapter 15
Tolerance is the variation allowed on a dimension; it may be specific to one dimension or a general tolerance for all dimensions not having a specific tolerance.
ClearanceMAX = CavityMAX - FillerMIN ClearanceMIN = CavityMIN - FillerMAX
ToleranceSYSTEM = ClearanceMAX - ClearanceMIN = Tol1 + Tol2 + ....Toln
Interference is negative clearance.
FASTENING - Chapter 17
Know screw thread terminology and profiles. Be able to read or write a thread specification for inch or metric threads. Recognize or draw the symbols for schematic or simplified threads. Recognize various thread applications: pipe threads, bolts, nuts, studs, and screws (cap screws, machine screws, shoulder screws, screws). Recognize non-threaded fasteners such as keys, pins, rivets, washers, rings and springs.
WELDING - Chapter 25
Recognize the component parts of a weld symbol and be able to explain and/or draw the simple symbols such as fillet, square, bevel, V, U, and J welds.