ADDA Drafting Certification: Competency 1(General Terminology) Questions and answers, VERIFIED.

ADDA Drafting Certification: Competency 1(General Terminology) Questions and answers, VERIFIED. centimeters - -1/100th of a meter millimeters - -1/1000ths of a meter meter - -basis for metric system; = to 100 cm, 1000mm, 10 dm, etc. decimeter - -1/10th of a meter American Society of Mechanical Engineers - -ASME dekameter - -10 meters kilometer - -100 dekameters; 1000 meters 25.4 - -millimeters per inch fraction - -part of a whole, such has 1/2 or 1/4 1:2 - -half scale 2:1 - -double size drawn to scale - -drawing an object to a set proportion metric system - -decimal system of wights and measures based on the meter and the kilogram; SI (international system) linear unit is millimeter lettering - -single stroke gothic; TOM Q. VAXY is all the letters that are as tall as they are wide; drawn w/HB foreshortened - -surfaces do not give a clear or accurate representation of the size or shape of the surface or features and should not be dimensioned; lines and surfaces that are inclined to the picture plane appear this way bisecting - -dividing into two equal parts; drawn by setting compass length greater than half of line's length and striking arc w/center at each endpoint, then drawing a line perpendicular to the original line through the point where the arcs crossed equilateral - -all side lengths are equal concentric - -having a common center 180º - -number of degrees in a triangle 360º - -number of degrees in a circle [and quadrilateral] quadrant - -one of four sections into which the coordinate plane is divided (and/or a circle) revision block - -placed in upper righthand corner of page; brief listing of revisions made to a drawing since it was initially released to manufacture, includes revision zone, letter, date, and name of revisor and revising checker surface finish mark - -can appear as checkmark, check with micron-smoothness number in it, a V, or an S with a line through it where it intersects the object line; indicates surfaces that are machine finished 8.5" x 11" - -A-size layout 11" x 17" - -B-size layout 17" x 22" - -C-size layout 22" x 34" - -D-size layout