2010 Academic Challenge

Transcription

1 2010 Academic Challenge ENGINEERING GRAPHICS TEST STATE FINALS This Test Consists of 40 Questions Engineering Graphics Test Production Team Ryan K. Brown, Illinois State University Author/Team Leader Jacob Borgerson, Independent Consultant Reviewer Mary Weaver, WYSE Coordinator of Test Production GENERAL DIRECTIONS Please read the following instructions carefully. This is a timed test; any instructions from the test supervisor should be followed promptly. The test supervisor will give instructions for filling in any necessary information on the answer sheet. Most Academic Challenge sites will ask you to indicate your answer to each question by marking an oval that corresponds to the correct answer for that question. One oval should be marked to answer each question. Multiple ovals will automatically be graded as an incorrect answer. If you wish to change an answer, erase your first mark completely before marking your new choice. You are advised to use your time effectively and to work as rapidly as you can without losing accuracy. Do not waste your time on questions that seem too difficult for you. Go on to the other questions, and then come back to the difficult ones later if time remains. *** Time: 40 Minutes *** DO NOT OPEN TEST BOOKLET UNTIL YOU ARE TOLD TO DO SO! 2010 Worldwide Youth in Science and Engineering WYSE, Worldwide Youth in Science and Engineering and the WYSE Design are service marks of and this work is Copyright 2010 by the Board of Trustees of the University of Illinois at Urbana Champaign. All rights reserved

2 WYSE Academic Challenge Engineering Graphics Test (State Finals) An engineering drawing created by hand (sketching or instrumental) should still use ASME standard lettering, which is best described by ALL of these terms EXCEPT: A. Sans-serif B. Single-stroke C. Uppercase D. Stylistic E. Vertical 4. The tools shown in this illustration are for cutting threads, and are usually referred to as a tap and set. 2. Identify the incorrect equivalent below: A mm = 1 m B. 2 dm = 20 cm C. 60 km = 6000 m D..4 cm = 4 mm E..09 m = 9 cm 3. Select the geometric term that applies to the inclined edge of the triangle development, if wrapped around the cylinder. A. die B. screw C. drill D. punch E. bit 5. If a right side view is projected onto a profile plane of projection, and that view features the true size and shape of surface F, identify the group of letters that represents surfaces perpendicular to the profile plane: A. Spiral B. Parabola C. Elliptoid D. Involute E. Helix A. A,B,C,D,E B. D,E,F C. F,G,H D. E,G,J E. A,B,C,D,G,H

3 Engineering Graphics The figure below illustrates the three possible meanings of a multiview line: (A) only the edge where two surfaces intersect; (B) an edge view of a flat surface as a line; or (C) the maximum contour element of a curved surface. In the front view (below left), how many of the seven visible lines have meaning A (only the edge where two surfaces intersect)? 8. Illustrated below is a sectional front view of a part that will be manufactured by welding flat ½ thick plates on each end of a truncated round pipe. Each plate has two bolt holes bored through, plus a central hole. Identify the FALSE statement about additional views the drafter may use. A. 1 B. 2 C. 3 D. 5 E Finish the one-point perspective drawing of this object, which features only one depth dimension. How many line segments did you need to finish the drawing? A. The two holes on the upper plate will appear elliptical in a top view or side view. B. An auxiliary view will reveal that the two plates are the same size. C. The two holes on the lower plate will appear elliptical in a complete auxiliary view that shows the upper plate as true shape. D. The large hole through the pipe will appear circular in a top view, but not an auxiliary view. E. If oriented to see the true size and shape of the upper plate, an auxiliary view would show the hole through the upper plate as an ellipse. A. 9 B. 10 C. 11 D. 12 E Traditional angular tolerances such as +/- 2 create a tolerance zone. A. rectangular B. circular C. fan-shaped D. square E. elliptical

4 Engineering Graphics Identify the TRUE statement about schematic thread representation: A. The hidden lines should be very thin. B. The root lines are drawn thick, while the crest lines are drawn thin. C. The crest lines and root lines should always be about 1/8 apart. D. The crest lines should slope to the left, even if it is a RH thread. E. Omit the hidden lines for 2 or greater major diameter. 13. Select the solution that has a tolerance of.004 and provides a clearance fit with an allowance of If the holes on this part are located as shown, the diameter of the bolt circle on which they are located could be specified as a(n) dimension. 14. The front view of this drawing is incomplete. Identify a description of the true projection of the intersection between these two cylinders: A. local B. radius C. tolerance D. reference E. ordinate 12. A collection of symbols identified as SQUARE, FILLET, U-GROOVE, J- GROOVE, and BEVEL are all related to what type of engineering drawing? A. Electronic B. Casting C. Development D. Civil E. Welding A. An irregular curve B. Perfect half ellipse C. Straight line segment D. Perfect semi-circle E. A V shape

5 Engineering Graphics The diagram below could be created with the help of a CAD symbol library. How many CAD symbols should be created for this schematic? 17. A thread note is specified as shown below. Identify the TRUE statement: A. The major diameter is less than 1. B. The pitch is greater than 1/8. C. The length of the bolt is specified as D. The pitch of the thread is less than 1mm. E. The major diameter is more than 32 mm. A. 3 B. 4 C. 5 D. 6 E How many points of tangency are featured on this geometric construction? 18. Many 3D CAD programs now include the ability to apply texture, lighting, and shading to the model. As a result, a photorealistic image, most often referred to as a, can be created. A. prototype B. photo-scan C. rendering D. kinescope E. stereo-lithography 19. The front view direction is indicated. How many hidden lines would there be in a multiview (front, top, and right side) drawing of this part? A. 2 B. 3 C. 4 D. 5 E. 6 A. 0 B. 1 C. 2 D. 3 E. 4

6 Engineering Graphics The pictorial view below illustrates the principle of a section. 23. Examine the assembly drawing shown below and identify how many parts have at least one threaded feature. A. half B. phantom C. fractured D. removed E. broken-out 21. The double-spaced section lines in the view below illustrate an acceptable method of representing the section of a. A. 2 B. 3 C. 4 D. 5 E. 6 A. gear B. hub C. rim D. spoke E. web 22. On the CAD monitor, the wireframe representation of a CAD model has a depth axis angling 10 above horizontal, and a width axis angling 20. With the height axis vertical, this form of representation is referred to in engineering graphics as. A. dimetric B. isometric C. 2-point perspective D. axonometric E. oblique 24. For the views below, the choice and placement of dimensions is different due to this part s rounded end. Identify a TRUE statement about the dimensions that should be applied to this drawing. A. The depth dimension in the right side view can be omitted. B. The radius of the arc on the right end of the contour view can be omitted. C. The hole diameter can be omitted. D. If the left radius is given, the height measurement can be omitted, or if the height measurement is given, the radius value can be omitted. E. All circular features in this particular drawing should be specified by diameter.

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