2009 Academic Challenge

Transcription

1 2009 Academic Challenge ENGINEERING GRAPHICS TEST STATE FINALS This Test Consists of 50 Questions Engineering Graphics Test Production Team Ryan Brown, Illinois State University Author/Team Leader Kevin Devine, Illinois State University Author Jacob Borgerson, PhD, University of Illinois at Urbana-Champaign 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! 2009 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 2009 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) As illustrated below, the miter line is sometimes used in multiview drawing to help transfer measurements from the top view to the side view. A. length B. width C. depth D. breadth E. height 4. A manufacturing term for pushing or forcing material through a shaped opening; also used in CAD systems as a term that describes a way to turn a 2D shape into a 3D model. A. Fillet B. Inject C. Extrude D. Chamfer E. Implode 5. Given this geometric shape with line segment CD horizontal, determine interior angle A-B-C: 2. A term used by many 3D CAD modeling programs to indicate that a 2D pre-model sketch is completely defined or dimensioned: A. Constrained B. Forced C. Immobile D. Flat E. Locked 3. What do the series of alternating thick and thin lines represent in the illustration below? A. 95 B. 90 C. 85 D. 80 E In this 2-point perspective illustration, how many of the lines shown, if any, are parallel with each other? A. Heat treatment B. Knurls C. Coating D. Crests and roots E. Springs A. 0 B. 3 C. 5 D. 7 E. 9

3 Engineering Graphics 2 7. Study the section view illustrated below, and then select a type of section view that is NOT a possibility for that view. A. Broken-out section B. Removed section C. Full section D. Aligned section E. Offset section 8. In the illustration below, the labels horizontal, frontal, and profile are applied to planes. 10. All of the following are GOOD suggestions for dimensioning except one. Identify the POOR suggestion. A. All dimension linework should be thick and bold B. Place longer dimensions further from the object C. It is acceptable for extension lines to cross each other D. It is preferable that dimension lines do not cross each other E. Keep dimensions off the object if possible 11. What distance is indicated on the measuring scale illustrated below? A. datum B. first-angle C. perspective D. normal E. projection 9. Which of the following is a term that is applied to an oblique drawing, indicating the depth axis is full scale? A. Dimetric B. Cavalier C. Vanishing point D. Crystal E. Horizon A B C D E The documents that set forth recommendations for drafting practice in the engineering graphics field are called. A. codes B. standards C. guides D. reviews E. notes

4 Engineering Graphics The multiview drawing below features an auxiliary view. However, there are hidden line segments missing from the three views that are necessary to make it correct. 15. A classic brain teaser asks the question, Can one object be designed that can pass through, and fill, each shape illustrated below as A, B, and C. (The solution is shown as a multiview.) A 3D CAD model of the solution could be modeled by passing three shapes through each other (as shown at D) and using a(n) function. A. 0 B. 1 C. 2 D. 3 E As shown in this illustration, the shape of a lamp reflector could be based on a(n), resulting in light reflecting straight out. A. subtract B. extrude C. loft D. union E. intersect 16. What common dimensioning rule is illustrated by the figure below? A. helix B. ellipse C. parabola D. spiral E. rhombus A. Metric rule B. Bushing rule C. Cylinder rule D. Right side rule E. No leader rule

5 Engineering Graphics In engineering education, it is common to number the vertices of an object to help solve a problem. In the illustration, what numbers should be assigned to the lower right corner of the side view? 19. This oblique drawing can be created with true circles and arcs, not ellipses. How many unique center points are required to construct this drawing? A. 9,7,10 B. 5,8 C. 10,7,9 D. 8,10 E. 9, This full section describes one view of a wheel that features a hub and a rim. Identify a statement below that can be TRUE about this view. A. 4 B. 5 C. 6 D. 7 E Given two different end views of a bolt, with both being possible correct views, identify a TRUE statement below. A. The section lines in the smaller rectangles should be reversed (i.e. slope up to the left) B. The material between the hub and rim is obviously a solid web, but is not section-lined because it is a web C. To make the view correct, the upper and lower horizontal lines should be trimmed out between the larger sectioned rectangles D. The material between the hub and rim might be spokes, but are not section-lined because it would give the false impression of a solid web E. The white rectangle area in the center is obviously a round hole A. B is different because the thread is a knuckle thread B. A is different because it is a metric thread C. B is different because the bolt has a chamfered end D. A is different because it is a lefthand thread E. B is different because it is a wooden part

6 Engineering Graphics Examine the views and then select an edge that shows as a true length line. 24. What is the allowance of the mating relationship illustrated below? A. Edge 4-8 in auxiliary view B. Edge 5-1 in top view C. Edge 7-3 in front view D. Edge 6-2 in auxiliary view E. Edge 8-5 in front view A..006 B..013 C..014 D..020 E Read the note that specifies the machining specifications and threads for the featured hole. Identify the value that is not specified in the note. 22. For the same object illustrated above in Item 21, how many edges of the object are oriented in a normal direction, i.e. perpendicular to a frontal, horizontal, or profile plane of projection? A. 2 B. 4 C. 6 D. 8 E Basically, welding symbols are like a line with extra symbols attached to indicate such things as the type and size of weld. A. chain B. leader C. phantom D. center E. break A. A B. B C. C D. D E. E

7 Engineering Graphics Specifically, what common term is applied to the way this dimension specifies the tolerance? 29. Of the five choices below, select the one surface number that does not have a corresponding letter shown on the pictorial. A. Limit method B. Unilateral tolerance C. Basic dimension D. Bilateral tolerance E. Maximum material method 27. How many different kinds of lines (i.e visible, hidden, etc.) are represented in the drawing below? A. 3 B. 4 C. 5 D. 6 E. 7 A. 1 B. 2 C. 6 D. 7 E Examine the illustration of three circles, each with a diameter of 2, and mutually tangent to each other. Identify the FALSE statement. 28. A machinist must select an appropriate and use it before cutting the threads on the inside of a hole. A. tap drill B. reamer A. Triangle A-B-C is equilateral C. punch B. Triangle D-E-F is equilateral D. tolerance gage C. Points D, E, and F are the points of E. die tangency for the circles D. The area of triangle D-E-F is onethird the area of triangle A-B-C E. Segments A-B, A-C, and B-C are each 2 long.

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