2001 Academic Challenge

Transcription

1 Worldwide Youth in Science and Engineering 2001 Academic Challenge ENGINEERING GRAPHICS TEST - STATE FINALS GENERAL DIRECTIONS Engineering Graphics Test Production Team Ralph Dirksen, Western Illinois University Team Leader/Co-Author Richard Carter, Western Illinois University Co-author Rafael Obregon, Western Illinois University Co-author Joe Kotowski, Oakton Community College Reviewer Don Wayman, WYSE Coordinator of Test Production 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. Some Academic Challenge test sites are using answer sheets that require you to fill in the letter of the answer you choose on the blank line after each question number. Others may ask you to indicate your answer to each question by marking an oval that corresponds to the correct answer for that question. Only one oval should be marked to answer each question. Multiple ovals will automatically be graded as an incorrect answer. Be sure ovals are marked as. Not as,,. Test Question - 1. What is the name of the robotic helicopter used for surveillance by the U. S. Army? a. Eye in the Sky b. ROBOT I c. Surveyor I d. CYPHER e. Robospierre Answer Sheet-- 1. A B C E 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 are too difficult for you. Go on to the other questions and come back to the difficult ones later if you can. *** TIME: 40 MINUTES *** DO NOT OPEN TEST BOOKLET UNTIL YOU ARE TOLD TO DO SO! 2001 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

2 Copyright 2001 Board of Trustees of the University of Illinois at Urbana - Champaign. All rights reserved.

3 WYSE Academic Challenge Engineering Graphics Test (State Finals) The welding symbol represents which of the following? a. butt weld on the opposite side. b. fillet weld on the arrow side. c. bevel weld on the opposite side. d. angular weld on the arrow side. 2. The electrical symbol correspond to which of the following? a. battery. b. ground. c. resistor. d. switch. e. capacitor. 3. The single-line piping symbol indicates which of the following? a. 90º screwed elbow b. 90º flanged elbow c. 90º angle valve d. 90º angle gate 4. In GD&T, the symbol denotes which of the following? a. concentricity b. symmetry c. true position d. straightness e. flatness 5. When constructing multi-view working drawings, an object should be positioned so that: a. it s in its natural sitting position b. its primary faces are parallel to the planes of projection c. the views show the fewest hidden lines d. all of the above 6. A circle that is oblique to all three principal planes of projection will project as in the front view. a. a circle b. an ellipse c. a line d. all of the above 7. A cavalier drawing is a form of which major drawing category? a. axonometric b. oblique c. orthographic d. perspective e. none of these 8. Angled exterior corners of a part are known as which of the following? a. rounds b. fillets c. slices d. chamfers

4 Engineering Graphics 2 9. In oblique drawing the face of an object containing circles and arcs should best be positioned parallel to which face of the projection box? a. front b. top c. side d. any of these e. none of these 10. Precedence of lines on drawings requires that object lines take precedence over which of the following? a. center lines b. hidden lines c. dimension lines d. all of the above 11. If a steel beam is 72 feet long and it is drawn to a scale of ¼" = 1', how long will it appear on the drawing? a. 72" b. 36' c. 1¼" d. 18" 12. According to ANSI, a standard C size sheet of paper measures a. 11" 17". b. 17" 22". c. 22" 34". d. 34" 44". 13. The name of the dimensioning style in which the imaginary axis through the dimension numerals is parallel to its extension lines is which of the following? a. tolerance system b. unique system c. aligned system d. unidirectional e. none of these 14. Floating and docking are terms that refer to the CAD drafter s choices of positioning which one of the following features? a. commands b. aliases c. toolbars d. properties e. function keys 15. Which type of line is particular to section drawings? a. leader b. break c. extension d. phantom e. cutting plane 16. When an invisible line is a continuation of a visible line, the invisible line begins with which of the following? a. dot b. dash c. space d. tilde e. hyphen

5 Engineering Graphics The center of an arc, tangent to two existing non-intersecting arcs with equal radii, is located at a distance equal to which of the following? a. the existing arc radius minus the tangent arc radius b. the existing arc radius plus the tangent arc radius c. twice the existing arc radius d. the existing arc radius plus twice the tangent arc radius 18. In CAD, the imaginary space where 3D objects are created and edited is known as. a. real space b. time space c. paper space d. model space e. setting space 19. Type of key specified on a drawing by its number, the last two digits of which represent nominal diameter in eighths of an inch. a. Flat b. Woodruff c. Gib Head d. Cotter e. Pratt and Whitney 20. The alternative description of the surfaces of a three-dimensional object as two-dimensional pattern is known as which of the following? a. modeling b. visualization c. development d. construction

6 Engineering Graphics 4 Answer questions 21 through 25 using the Basic Hole System to calculate the limits of size and to determine the type of fit. Note: Filling in the calculation grid is optional, and will not be graded. It is furnished for your convenience. Only the final answer will be graded. 21. Basic Size: 1¼". Ø SHAFT HOLE Ø UPPER LIMIT: LOWER LIMIT: TOLERANCE: ALLOWANCE: MAX. CLEARANCE: (MIN. INTERF.) Tables Values Shaft Hole A. Clearance Fit B. Line Fit C. Transition Fit D. Interference Fit E. None 22. Basic Size: 305 mm. Ø SHAFT HOLE UPPER LIMIT: LOWER LIMIT: TOLERANCE: Ø ALLOWANCE: MAX. CLEARANCE: (MIN. INTERF.) Tables Values Shaft Hole A. Clearance Fit B. Line Fit C. Transition Fit D. Interference Fit E. None

7 Engineering Graphics Basic Size: 3¾". Ø SHAFT HOLE Ø UPPER LIMIT: LOWER LIMIT: TOLERANCE: ALLOWANCE: MAX. CLEARANCE: (MIN. INTERF.) Tables Values Shaft Hole A. Clearance Fit B. Line Fit C. Transition Fit D. Interference Fit E. None 24. Basic Size: 279 mm. Ø SHAFT HOLE UPPER LIMIT: LOWER LIMIT: TOLERANCE: Ø ALLOWANCE: MAX. CLEARANCE: (MIN. INTERF.) Tables Values Shaft Hole A. Clearance Fit B. Line Fit C. Transition Fit D. Interference Fit E. None 25. Basic Size: 6½". Ø SHAFT HOLE Ø UPPER LIMIT: LOWER LIMIT: TOLERANCE: ALLOWANCE: MAX. CLEARANCE: (MIN. INTERF.) Tables Values Shaft Hole A. Clearance Fit B. Line Fit C. Transition Fit D. Interference Fit E. None

8 Engineering Graphics 6 Select the correct missing view for each of the following problems,

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12 WYSE Academic Challenge Engineering Graphics Test (State Finals) 2001 Engineering Graphics Answer questions 41 through 50 based on the following working drawing. B 8X 1-12 UNF-2B Ø2.00 C E 1.29 F D Ø1.20 G H 0.75 A Ø7.00 Ø TITLE: MATCHING WHEEL UNLESS OTHERWISE SPECIFIED ALL DIMENSIONS ARE IN INCHES BY: R.C. TOLERANCES.X ±.005.XX ±.002 DATE: 12/05/00.XXX ±.001 ANGLES ± 1 MATERIAL: C R S SCALE: FULL SHEET: 1/1 41. How deep is hole A? 42. What is Angle B? a a. 25º b b. 50º c c. 30º d d. 75º e e. 45º

13 43. How deep is hole G? a b c d e. through 44. What is the measurement of H? a b c d e. through 45. What is the inside-diameter of the cylinder in center of this object? a. 2.0 b. 3.0 c. 5.0 d. 1.2 e How thick are the cylinder walls identified by E? a b c d e Engineering Graphics Why is area F not hatched? a. to allow room for dimensioning b. this is a different material than the other c. this is a cut surface d. this is an open channel 48. Why is hole A dashed? a. this is a counter bore b. this is a blind hole c. this hole is threaded d. this is a spotface 49. In note C, what does UNF represent? a. united national fit b. unified national fine c. united national force d. under normal fit e. united normal fine 50. What is measurement D? a. 1.0 b. 2.0 c. 5.0 d. 7.0 e. 12