MAE 1351 FINAL DETAILED EXAM 2025

Descriptive geometry is described in the book and video lecture in relation to: - Correct Answer-Geometry as a means of computation and analysis An engineering drawing can be considered a legally binding document. - Correct Answer-True The term "IPS" in SolidWorks refers to ... - Correct Answer-measurement units To create an extrusion, I must first draw a sketch on a surface. True? - Correct Answer Yes, but the surface must be flat To create a revolved feature, the profile and the axis of revolution must be coplanar. True? - Correct Answer-True To create a solid of revolution, I must... - Correct Answer-Make an axis in the sketch using a construction line Use reference geometry to make an axis Select a plain line from the sketch to use as an axis These are the fundamental types of sketch constraints: - Correct Answer-Both geometrical and dimensional To clock a hexagon so that it rests horizontally on one side, I would... - Correct Answer Apply a horizontal constraint Apply a dimension Apply a parallel constraint I have a distance in my sketch preceded by a "sigma" symbol. This means... - Correct Answer-it is a dimension driven by a parametric formula In the default view, the Y axis in Solidworks points in this direction... - Correct Answer up The front plane in Solidworks is defined by these axes: - Correct Answer-xy The following feature facilitates removal from a mold - Correct Answer-Draft A blend (loft) requires at least these many profile sketches: - Correct Answer-2 Aluminum is a common prototyping material. True? - Correct Answer-yes MAE 1351 MAE 1351 Identify the ANSI thread: - Correct Answer-10-32 UNF - 2A "Casting" would be an example of: - Correct Answer-bulk formation "Extrusion" would be an example of: - Correct Answer-Bulk deformation Reaming is most closely associated with: - Correct Answer-drilling Anodizing would be an example of: - Correct Answer-finishing casting, molding, power metallurgy, rapid prototyping (rp) - Correct Answer-bulk formation forming (forge/roll/extrude/vacuum) sheet metal (stamping/bending/drawing) - Correct Answer-bulk deformation sawing, drilling, turning, milling, grinding, die cutting, sheet metal (punching) EDM - Correct Answer-material removal welding, soldering, bonding, fastening, ultrasonic - Correct Answer-joining polishing, plating, painting, anodizing, heat treat - Correct Answer-finishing market need identification product specification concept development detail design production distribution - Correct Answer-The design process ASME Y14.5M-1994 Rules - -1. Where the dimension is less than one millimeter, a zero precedes the decimal point. 2. Where dimension is a whole number, neither the decimal point nor the zero is shown. 3. Where the dimension exceeds a whole number by a decimal fraction of one milli meter, the last digit to the right of the decimal point is not followed by a zero. 4. Neither commas nor spaces shall be used to separate digits into groups in specifying millimeter dimensions on drawings (e.g., 1000 not 1,000) Rules to help distinguish 2 systems, for decimal inches. - -1.A zero is not used before the decimal point for values less than one inch. 2. A dimension is expressed to the same number of decimal places as its tolerance. Zeros are added to the right of the decimal point where necessary. Fundamental Rules for Dimensioning - -a. Each dimension should have a tolerance, except for dimensions that are identified as a reference, max, min , or stock . MAE 1351 MAE 1351 b. Dimension and tolerancing shall be complete so that there is a full understanding of the characteristic of each feature. c. Each necessary dimension of an end product shall be shown. No more dimensions than needed. Use of reference dimensions should be minimized. d. Dimensions shall be selected and arranged to suit the function and mating relationship of a part and shall not be subject to more than one interpretation. e. The drawing should define a part without specifying manufacturing methods. f. It is permissible to identify as nonmandatory certain processing dimensions that provide for finish allowance, shrink allowance, and other requirements, provided the final dimensions are given on the drawing. g. Dimensions should be arranged to provide required information for optimum readability. h. Wires, cables, sheets, rods, and other materials with code numbers should be specified with linear dimensions indicating diameter or thickness. i. 90 degree angles where centerlines and lines depicting features are shown at right angles and no angle is specified. j. A 90 degree basic angle applies where centerlines of features in a pattern or surfaces shown at right angles where they are defined by basic dimensions and no angle is specified. k. Otherwise specified all dimensions are applicable at 20 degrees Celsius. l. all dimensions and tolerances apply in a free state condition, does not apply to non rigid parts. m. Otherwise specified, all geometric tolerances apply for full depth, length, and width of the feature. n. Dimensions and tolerances only apply at the drawing level where they are specified. Dimension - -A numerical value expressed in appropriate units of measure and used to define the size, location, geometric characteristics, or surface texture of a part or feature. Arrowhead - -A small triangle at the end of dimension lines and leaders to indicate the direction and extent of a dimension. Dimension Line - -A thin dark, solid like that terminates at each end with arrow heads. Value of dimension is typically shown in the center of the dimension line. Extension Line - -A thin, dark solid line extending from a point on an object perpendicular to a dimension line. Used to indicate an extension of a surface. Leader - -A thin, dark solid line terminating with an arrowhead at one end and a dimension, note, or symbol at the other end. redundancy - -stupid Contour Rule - -Each dimension should be placed where the contour shape is shown. MAE 1351 MAE 1351 Baseline dimensioning - -All dimensions originating from a base or datum, commonly used for cnc machines that work from a rectangular coordinate system. Can eliminate some accumulation of tolerances, is variable for what you are using it for. Chain dimensioning - -features are dimensioned relative to one another (used when a part function requires that features be related to one another) Largest accumulation of tolerance between features. General Notes - -Appear in the lower right hand corner of a drawing and apply to the whole drawing Local Notes - -Connected to specific features on the views of the drawing. Also known as annotations. Specified with leader lines. Unilateral Tolerancing - -All of the deviation is in one direction from the basic size. Tolerance is all above or all below the basic size of the dimension. Bilateral Tolerancing - -Where the deviation is divided in some way above and below the basic size of the dimension. The tolerance can be equally or unequally distributed about the basic size. Limit Dimensions - -Displayed with the high limit above the low limit. If the dimension is displayed on a single line, the low limit appears before the high limit. Direct dimensioning - -Best way to control tendency of tolerances to accumulate. Involves placing a single dimension between 2 key points to minimize tolerance accumulation. Statistical Tolerancing - -A way to assign tolerances based on sound statistical practices rather than conventional tolerancing practices. Clearence fit - -Specifying the limits of size in such a way that a clearance or space always fits between mating parts. Interference fit - -Specifying the limits of size in such a way that an interference of material always exists between mating parts. Transition fit - -Specifying the limits of size in such a way that either a clearance or interference fit will exist when mating parts are assembled. Allowance - -Difference between the maximum material limits of mating parts. It is the minimum clearance or maximum interference. MAE 1351 MAE 1351 Tolerance - -Total permissible variation of a size, it is the difference between the upper and lower limit. Basic size - -size from which the limit dimensions were derived. Clearance - -Refers to a fit where there is space in between 2 mating parts. Interference - -A fit where the 2 mating parts have intersecting nominal volumes, requiring the deformation of the parts. Hole basis or Basic hole system - -the basic size is applied to the lower limit of the hole and is frequently used. Shaft basis or basic shaft system - -the basic size is applied to the upper limit of the shaft and is used when several parts are required to fit on a shaft. RC - Running or Sliding Clearance Fit - -- Intended to provide running performance with suitable lubrication throughout a range of sizes. - RC9 (loosest) - RC1 (tightest) LC - Locational Clearance Fit - -Fits that are intended for parts that are normally stationary but can be freely assembled or disassembled. Range from snug fits for parts requiring accuracy of location to medium clearance fits. LT- Locational transition Fit - -These fits are intended where accuracy of location is important but a small amount of clearance or interferences are permissible. LN Locational Interference Fit - -These fits are intended where accuracy of location is of prime importance and where parts require rigidity and alignment with no special requirement for bore pressure. FN - Force or Shrink Fit - -These types of interference fits are usually characterized by maintenance of constant bore pressures throughout the range of sizes. Loose Running Fit - -These fits are wide commercial tolerances or allowances on external members. Free Running Fit - -These fits are not for use where accuracy is essential, but are good for large temperature variations, high running speeds, and heavy journal pressures. Close Running Fit - -These fits are for running on accurate machines and for ensuring accurate location at moderate speeds and journal pressures. Sliding Fit - -These fits are not intended to run freely, but are intended to move and turn freely and locate accurately. MAE 1351 MAE 1351 Locational Clearance Fits - -These fits provide a snug fit for locating stationary parts; they can be freely assembled and disassembled. Locational Transition Fit - -These fits provide for accurate location and a compromise between clearance and interference. Locational Interference Fit - -These fits are for parts requiring rigidity and alignment with prime accuracy of location but without special bore pressure requirements. Medium Drive Fit - -These fits are for ordinary steel parts or shrink fits on light sections—the tightest fit usable with cast iron. Force Fit - -These fits are suitable for parts that can be highly stressed or for shrink fits where the heavy pressure forces required are impractical. Geometric Dimension and Tolerancing (GD&T) - -The system allows the designer to clearly specify design intent. There is better communication throughout the design process. The system is set up so that almost nothing can be interpreted in more than one way. A datum reference frame to immobilize and orient the part Specific form, orientation, and location tolerances that describe 2D and 3D tolerance zones within which all part geometry must fall. Datum Reference Frame - -Theoretical system made up of three mutually perpendicular planes, or datums, established by real features on the object. 2 Things You Need to Keep in Mind with GD&T - -The imaginary or theoretical coordinate system and perfect part geometry that exists within the CAD software, CNC manufacturing software, or inspection software. The real features on the finished object. Feature Control Frame - -Contains geometric characteristic symbol, the geometric tolerance, and the relative datums. Maximum Material Condition (MMC) - -Modifier allows the size of the zone to change if the size of the hole changes. It is the condition in which a feature of size contains the max material within the stated limits of size. Least Material Condition (LMC) - -Condition in which a feature of size contains the minimum amount of material within the sta