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IED Unit 7
| Question | Answer |
|---|---|
| Arcs and circles are dimensioned in views that show? | The arcs and circles |
| Arcs are dimensioned with? | A leader (to show the radius) and in some cases a center mark. |
| Circles are dimensioned with? | A leader (to show the diameter) and a center mark. |
| When is an offset used? | When constraining two parts |
| What constraint would you use to place a pin inside of a hole. | Insert constraint |
| What is a subassembly? | An assembly of a component used for the total assembly of a product |
| Why is detailed documentation important? | If documentation is incomplete or not detailed enough, the part cannot be produced as intended. |
| Angled surfaces are dimensioned with? | The coordinate method (specify two points that make up the distance) |
| What should you answer in a design brief? | Client, Problem statement, Design statement, and Constraints |
| What is a decision matrix? | A method of comparing design solutions against one another using criteria based on project requirements. |
| What is a technical report? | Reports that communicate technical information and conclusions about projects to customers, legal authorities, manangers, other engineers, etc. |
| What is an aligned dimension? | A system of dimensioning which requires all numerals, figures, and notes to be aligned with the dimension lines so that they may be read from the bottom (for horizontal dimensions) and from the right side (for vertical dimensions). |
| What is a baseline dimensioning system? | Dimensioning in which all dimensions are placed from a datum and not from feature to feature. |
| What is chain dimensioning? | Also known as point-to-point dimensioning; where dimensions are established from one point to the next. |
| What are limit dimensions? | The largest and smallest possible boundaries to which a feature may be made as related to the tolerance of the dimension. |
| What are location dimensions? | The distance from one feature to another feature in the same object. |
| What is a reference dimension? | A repeat of a given dimension or a dimension established from other values shown on a drawing. Reference dimensions are enclosed in ( ) on the drawing. |
| What is datum dimensioning? | A dimensioning system where each dimension originates from a common surface, plane, or axis. Also known as baseline dimensioning |
| What is unidirectional dimensioning? | Where all dimensions are facing the same direction (horizontal). |
| What is a tolerance? | The acceptable amount of dimensional variation that will still allow an object to function correctly. |
| What is a nominal size? | The designation of the size established for a commercial product. |
| What is a bilateral tolerance? | A tolerance in which variation is permitted in both directions from the specified dimension. |
| What is an allowance? | The tightest possible fit between two mating parts. |
| What is a clearance fit? | Limits the size of mating parts so that a clearance always results when mating parts are assembled. |
| What is an interference? | The amount of overlap that one part has with another when assembled. |
| What is the American National Standards Institute (ANSI)? | A private, non-profit organization that coordinates the development and use of voluntary consensus standards in the United States. |
| What is technical writing? | A type of expository writing that is used to convey information for technical or business purposes. |
| What is the American Society of Mechanical Engineers (ASME)? | A professional engineering organization that is known for setting codes and standards for mechanical devices in the United States. |
| What is a parts list? | A list of materials or parts specified for a project. Also referred to as a bill of materials or BOM. |
| What is the International Organization for Standardization? | A worldwide organization that creates engineering standards. |
| What is a decision matrix? | A tool used to compare design solutions against one another, using specific criteria. |
| What is market research? | The activity of gathering information about consumers’ needs and preferences. |
| What is auxiliary view? | A view that is used to show features that is located on an inclined surface in true size and shape. |
| What are section lines? | Thin lines used in a section view to indicate where the cutting plane line has cut through material. |
| What is a broken-out section? | A section of an object broken away to reveal an interior feature for a sectional drawing. |
| What are working documents? | Drawings that convey all of the information needed to manufacture and assemble a design. |
| What is a full section? | A sectional drawing based on a cutting plane line that extends completely through an object. |
| What is a detail view? | A view that is used to show a magnified view of features that are too small to adequately specify in another view. |
| What is a part drawing? | A drawing that contains all the information for making one part of the design. |
| What is a half section? | A sectional drawing based on a cutting plane line that cuts through one-quarter of an object. A half section reveals half of the interior and half of the exterior. |
| What is a section view? | Used to show “inside” details not apparent on the exterior of the part. |
| What is a cutting plane line? | A line drawn on a view where a cut was made in order to define the location of the imaginary section plane. |
| What is a blind hole? | A hole that does not go completely through the work piece. |
| What is taper? | Gradual diminution of width or thickness in an elongated object |
| What is a counterbore? | A cylindrical recess around a hole, usually to receive a bolt head or nut |
| What are tapped holes? | Holes that have internal threads |
| What is a countersink? | A conical-shaped recess around a hole, often used to receive a tapered screw. |
Created by:
jcristano