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This is a conical-shaped recess around a hole, often used to receive a tapered screw head:

A. Boss

B. Spotface

C. Counterbore

D. Countersink

Related Questions

  1. The type of line that projects from an object for the express purpose of locating a dimension is a ________…
  2. A line with a tapering width can be easily created by using the __________ tool.
  3. A fillet is a rounded surface on the ________ corner of a part.
  4. This material is used in masonry construction, most commonly for ornamental facing:
  5. This means that a feature of a finished product contains the maximum amount of material permitted by…
  6. In order to convert fractional inches into decimal inches ________.
  7. An architect often relies on a ________ to complete the set of technical drawings used in the design…
  8. Traditional drafters need to be able to create several different line widths because ________.
  9. The most common geometric form used in gears today is this:
  10. Most architectural drawings produced for field use by building contractors are printed on architectural…
  11. This is the measured size of a finished part:
  12. The ________ tool on the Dimension tool bar will place several dimensions at one time by using a selection…
  13. CAD programs which incorporate parametric modeling utilize a system in which the dimensions control…
  14. The daily workload of a ________ drafter would generally include technical drawings of machine parts.
  15. Using the Relative Polar Coordinate System to add a 3 inch line that is 45 degrees from the end point…
  16. In these drawings it is necessary to show cut surfaces and distinguish between adjacent parts:
  17. Dimensions are used on the elevation plan to describe ________.
  18. This is the most common application for developments and intersections:
  19. A back or backing weld is a type of:
  20. The foundation contractor will work with the following architectural plans.
  21. This type of projection is when projectors are parallel to each other, but is at an angle other than…
  22. In perspective drawings this is placed between the observer and the object:
  23. In this type of auxiliary view, a break line is used to indicate the imaginary break in the views:
  24. Some of the common terms used to describe technical drawing include:
  25. This type of solid has two bases that are parallel equal polygons:
  26. This type of auxiliary view is projected onto a plane that is perpendicular to one of the principal…
  27. A cylinder can be created by drawing a rectangular shape then the ________ tool.
  28. Dimension text is generally placed above the ________ line.
  29. This is a solid shape that fits inside the mold and forms a hole in a cooled cast metal or molten plastic…
  30. A half-moon protractor is divided into how many degrees?

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