Drafting Exercises

Print Reading

for Drafting & Engineering Drawing

Paul Ross Wallach 82071

PRINT READING FOR DRAFTING & ENGINEERING DRAWING

Table of Contents INTRODUCTION

1

BASIC DRAFTING CONCEPTS Exercise 1: Identify the drawing type Exercise 2: Identify the drawing type Exercise 3: Identify the drawing type Exercise 4: Identify the drawing type Exercise 5: Identify the drawing type Exercise 6: Identify the drawing type Exercise 7: Identify the drawing type Exercise 8: Identify the drawing type Exercise 9: Identify the drawing type Exercise 10: Identify the drawing type Exercise 11: Sectional drawings Exercise 12: Geometric terms

3 4 5 6 7 8 9 9 11 11 12 14 Exercise 13: Two-dimensional geometric 16 Exercise 14:

forms Solid geometric forms

DRAFTING CONTROL SYSTEMS Exercise 15: Line conventions Exercise 16: Line conventions Exercise 17: Line convenions Exercise 18: Line convenions Exercise 19: Dimensioning conventions Exercise 20: Dimensioning conventions Exercise 21: Dimensioning conventions Exercise 22: Dimensioning conventions Exercise 23: Dimensioning conventions Exercise 24: Dimensioning conventions Exercise 25: Dimensioning symbols Exercise 26: Dimensioning symbols Exercise 27: Tolerances Exercise 28. Tolerances Exercise 29: Tolerance symbols Exercise 30: Geometric tolerancing and dimensioning symbols – 1 Exercise 31: Geometric tolerancing and dimensioning symbols – 2 Exercise 32: Positional tolerancing Exercise 33: Surface finishes

18 20 21 22 23 24 25 25 26 26 27 28 29 30 32 34 35 37 38 40

Exercise 34: Exercise 35:

Surface control finish symbol 41 Surface control 42

ENGINEERING DRAWING CONCEPTS Exercise 36: Planes of projection Exercise 37: Descriptive geometry Exercise 38: Cartesian coordinate system Exercise 39: Thread notes Exercise 40: Welding symbols Exercise 41: Welding symbols Exercise 42: Welding symbols Exercise 43: Welding notation Exercise 44: Welding notation Exercise 45: Gears Exercise 46: Gear terminology Exercise 47: Plumbing fittings

44 45 46 48 49 50 51 52 53 54 55 56

WORKING DRAWINGS Exercise 48: Threaded fasteners Exercise 49: Cover plate Exercise 50: Sealed tubing Exercise 51: Sealed cylinder Exercise 52: Wheel arbor Exercise 53: Arbor spindle Exercise 54: Ballpeen hammer Exercise 55: Scribe handle Exercise 56: Depth gauge Exercise 57: Tool vise Exercise 58: Hand tap vise Exercise 59: Colleted scribe holder Exercise 60: C-clamp Exercise 61: Gear puller Exercise 62: Socket drive handle

57 58 60 62 64 66 68 69 70 72 74 76 78 80 82

Identify the drawing type

Exercise

1

Select the correct technical term for this drawing. 1. auxiliary drawing 2. cabinet drawing 3. cavalier drawing 4. development (pattern) drawing 5. diametric drawing 6. isometric drawing 7. isometric sectional drawing 8. multiview (orthographic) drawing 9. perspective drawing 10. sectional callout ANSWER:





Exercise

12

14

Geometric Terms

geometric terms

Exercise

12

Identify the geometric terms shown on page 14.



1. acute angle



15. isosceles triangle



2. angleangle



16. obtuse angle



3. arc



17. parallel lines



4. center



18. quadrant



5. chord



19. radius



6. circumscribed circle



20. right angle



7. complementary angles



21. right triangle



8. concentric circles



22. scalene triangle



9. diameter



23. secant



10. eccentric circles



24. sector



11. equilateral triangle



25. segment



12. free curve



26. supplementary angles



13. inscribed circle



27. tangent line



14. intersecting lines

15

Exercise

19

dimensioning conventions

Identify the parts of the dimensions.



1. architectural dimension



2. arrowhead



3. dimension line



4. dual dimension mm/in.



5. decimal dimension



6. extension line



7. inch/fraction dimension



8. limit dimension



9. metric dimension



24

10. numerical dimension

8'- 6"

geometric tolerancing and dimensioning (ASME Y14.5) symbols – Part 2

Exercise

31

Match the symbol to its name.



1. all-around profile



2. angularity



3. at least material condition



4. at maximum material condition



5. circularity



6. circular runout



7. concentricity or coaxiality



8. cylindricity



9. diameter



10. flatness



11. parallelism



12. perpendicularity



13. position



14. profile of a line



15. profile of a surface



16. projected tolerance zone



17. regardless of feature size



18. straightness



19. total runout

37

Exercise

35

42

surface control

surface control

Exercise

35

Answer these questions about the drawing on page 42. 1. What is the lay’s directional surface pattern on the angular surface? A. B. C. D.

parallel straight angular perpendicular

ANSWER:



2. What is the height of the surface roughness width on the angular surface? A. B. C. D. E.

.05 micrometers .08 micrometers 1.6 micrometers .80 micrometers 3.2 micrometers

ANSWER:



3. What is the waviness height of the angular surface? A. B. C. D. E.

.05 micrometers .08 micrometers 1.6 micrometers .80 micrometers 3.2 micrometers

ANSWER:



4. What is the height of the surface roughness for the inside of the hole’s surface? A. B. C. D. E.

.05 micrometers .08 micrometers 1.6 micrometers .80 micrometers 3.2 micrometers

ANSWER: 5. What is the height of the surface roughness for the top surface of the wedge block? A. B. C. D. E.

.05 micrometers .08 micrometers 1.6 micrometers .80 micrometers 3.2 micrometers

ANSWER:

43

Exercise

39

thread notes

Select the correct answers from the standard nut and bolt thread notes. 1. What is the “2A” in the bolt’s thread note?

A. B. C. D.

American Standard External Threads ASME standard threads class 2 fit, external thread two threads per inch

ANSWER: 2. What is the “2B” in the nut’s thread note?

A. B. C. D.

class 2 fit, internal thread American Standard Internal Threads ASME standard threads two threads per inch

ANSWER:



3. What does the “13” in the thread note represent? A. B. C. D. E.

type of threads threads per inch length of bolt length of nut threads per millimeter

ANSWER:

48



4. What does the “1/2” in the thread note represent?

A. B. C. D. E.

crest of threads in inches length of threads in inches depth of threads in inches major diameter of threads depth of threads in millimeters

ANSWER:



5. What is the bolt type?

A. B. C. D.

square bolt hex bolt ASME bolt metric bolt

ANSWER:



6. What is the nut type?

A. B. C. D.

square nut hex nut ASME nut metric nut

ANSWER:



welding symbols

Exercise

40

Identify the welding symbols.

1. back (or backing) weld



2. bevel groove weld



3. fillet weld



4. J-groove weld



5. plug weld



6. square groove weld



7. U-groove weld



8. V-groove weld

49

scribe handle

Exercise

55

Answer these questions about the drawing above. 1. What is the concave radius in the swivel top (2)? A. B. C. D.

1/8" 1/4" 11/16" 3/4"

ANSWER: 2. What is the length of the knurling on the handle (1)? A. 5/16" B. 2 1/2" C. 2 1/8" D. 1 3/8"

ANSWER:

3. How is the swivel top (2) attached to the handle (1)? A. B. C. D.

threaded peened soldered welded

5. What is the diameter of the hole through the swivel top (2)? A. B. C. D.

.09" 1/8" 3/16" 5/8"

ANSWER:

ANSWER:

4. What do the letters F. A. O. mean?

6. What is the s pherical radius of the clamping h ead (3)?



A. Finished All Over B. Face Allowance Offset C. Fillet Assembled and Oiled D. Flange Alloy Oriented

ANSWER:

A. B. C. D.

16" 1/4" 3/16" 1/2"

ANSWER:

69