Basic technical drawing problems

164 Pages·1995·24.83 MB·English

by  John Thomas

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HENRY CECIL SPENCER
JOHN THOMAS DYGDON
JAMES NOVAK
E.
GLENCOE
McGraw-Hill
New York, NewYork Columbus, Ohio Mission Hills, California Peoria, Illinois
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Glencoe/McGraw-Hill
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ADitnsionofTheMcGrawHiJlCompcmks
Copyright© 1995 byGlencoe/McGraw-Hill. Previous copyright 1972 byThe Macmillan
Publishing Company.All rights reserved. Exceptas permitted underthe United States
CopyrightAct, no partofthis publication maybe reproduced ordistributed in anyformor
by any means, orstored in adatabase orretrieval system, without priorwritten
permission from the publisher.
Printed inthe United States ofAmerica
Send all inquiresto:
Glencoe/McGraw-Hill
3008W.WillowKnolls Dr.
Peoria, IL 61614-1083
ISBN 0-02-685661-1
2 3 4 5 6 7 8 9 10 069 02 01 00 99 98 97
—
Foreword
—
Basic TechnicalDrawingProblems is intended primarily for use with Basic Technical
Drawing{Sixth Edition, 1995) by Spencer, Dygdon, and Novak. All references and instruc-
tions refer to that text. However, this workbook may be used with other reference texts.
Since the time available in many schools for technical drawing has become increasingly
limited, the primary objective has been to provide in as few sheets as possible a complete
and thorough coverage ofthe basic fundamentals. A number ofsheets are printed on vellum
to provide experience in the manner ofcommercial practice. It is expected that in many
cases the instructor will supplement these problem sheets with assignments ofproblems
from the text to be drawn on blank paper, vellum, or film.
Many ofthe problems are based upon actual industrial designs. Their presentations are
in accord with the latest American National Drafting Standards. Less space is devoted to let-
tering and other routine exercises intended primarily to develop skills. Considerably more
emphasis is given to technical sketching. Numerous problems in the book make use ofgrids
A
similar to the various cross-section papers available commercially special effort has been
made to present problems that are thought-provoking, rather than merely requiring a great
deal ofroutine drafting.
Since many ofthe problems in this workbook and the accompanying textbook are ofa
general nature, they can also be solved on most computer-aided drafting (CAD) systems. If
a CAD system is available, the instructor may choose to assign specific problems to be com-
pleted by this method.
In line with the increased interest in charts and graphs, intersections and developments,
and descriptive geometry, a number ofproblems in these areas have been provided.
All sheets are 8 V'x 11", in conformity with the latest American National Drafting
4H
Standards. This size also facilitates handling and filing by the instructor. In general a
2H
pencil will be found suitable for construction lines and guide lines for lettering; a pencil
for center lines, section lines, dimension lines, extension lines, and phantom lines; and an F
pencil for general line-work and lettering. The student should make all construction lines
very light and he orshe should not erase them.
The Instructions provide detailed information together with references to the text for
each problem. The student is urged to study these instructions and references careftilly
before starting each problem.
The authors wish to express appreciation to their colleagues lor many valuable sugges-
tions and to the numerous industrial firms who have so generously cooperated in supplying
problem material. Comments and criticisms from users ofthis problems book will be most
welcome.
JOHN THOMAS DYGDON
Chicago, Illinois
JAMES NOVAK
E.
Chicago, Illinois
Contents
OUP TOPIC DRAWINGS
A VERTICAL LETTERING A-1 toA-3
B INCLINED LETTERING B-1 to B-3
C MECHANICAL DRAWING C-1 to C-4
D GEOMETRIC CONSTRUCTIONS D-1 toD-3
E TWO -AND THREE - VIEW MECHANICAL DRAWINGS E-1 to E-2
F TECHNICAL SKETCHING F-1 to F-3
G VIEWANALYSIS G-1
H MULTIVIEW PROJECTION H-1 toH-13
DIMENSIONING
J J-1 toJ-4
K SECTIONAL VIEWS K-1 toK-5
L AUXILIARYVIEWS L-1 to L-5
M
REVOLUTIONS M-1 toM-2
N THREADS AND FASTENERS N-1 to N-5
O ISOMETRIC DRAWING O-l to 0-4
P OBLIQUE DRAWING P-1 to P-3
Q DEVELOPMENTS AND INTERSECTIONS Q-1 to Q-4
R CHARTS R-1 to R-2
S DESCRIPTIVE GEOMETRY S-1 toS-3
LAYOUT SHEETS
DETAIL PAPER, 85"x 11" 2 sheets
.
VELLUM, 87" X 11" • 4 sheets
Instructions
Referencesare to theSixth Edition ofBasic TechnicalDrawing(1995) bySpencer, Dygdon, and Novak.
DrawingA-1. Vertical Capitals and Numerals. References: Sees. Exercise3. Proceedasin Exercise2. Useasharp F pencil. In the
5.1- 5.11.Allletteringonthissheetandtheremainingsheetsin titlestrip underDRAWN BY, letteryournamewith the last
thisworkbookistobedonefreehand.Thenecessaryguidelines, name first, using a sharp F pencil. Under FILE NO., letter
both horizontal and vertical, for Drawings A-1, A-2, and A-3 the identification symbol assigned byyourinstructor.
have already been drawn. Note that the horizontal guide lines
control the heights of the characters and that the randomly Drawing B-2. Inclined Capitals and Numerals. References: Sees.
spacedverticalguidelinesservesimplyas an aid in keepingthe 5.4-5.7,5.9,5.10,5.12,5.13,10.2-10.11.Allnecessaryguidelines
characters uniformlyvertical. areprovided.Allletteringmustbemadeclean-cutanddark.
Exercise 1. Usinga medium sharp HB pencil, letterthe charac- Exercises 1-5. Usingasharp F pencil, duplicate on the right side
ters shown in the spaces provided. These letters and numer- theinformationshown,includingarrowheadsandfinishmarks.
als may first be sketched lightly and then corrected where Exercise6. Reproducethetitleshowninthespaceprovidedatthe
necessary, before being made clean-cut and dark using the right. Payparticularattention totheaccuratecenteringofeach
strokesshown.Omitthearrowsandnumbersfromyourleners. lineofletteringin thetitle,aboutthegivenverticalcenterline.
Exercise 2. Using a fairly sharp F pencil, reproduce the given
words and numerals in the spaces directly below each line. Drawing B-3. Inclined Lowercase Lettering. References: Sees.
Payparticularattention to thespacingofletters andwords. 5.7, 5.10, 5.15. All necessary guide lines have been provided.
Exercise3. Proceedas in Exercise 2; useasharp F pencil. In the Note the additional horizontal guide lines for lowercase letter-
DRAWN
titlestripunder BY, letteryourname,withthelast ing.All letteringmustbe madeclean-cutanddark.
name first, using a sharp F pencil. Under FILE NO., letter Exercise 1. Usinga medium sharp HB pencil, letter the charac-
theidentification symbol assigned byyourinstructor. tersshowninthespacesprovided. Usethestrokesshown,but
omitthearrowsand numbers fromyourletters.
DrawingA-2. Vertical Capitals and Numerals. References: Sees. Exercise 2. Using a fairly sharp F pencil, reproduce the given
5.4-5.11, 10.2-10.11.Allnecessaryguidelinesareprovided.All words in the spaces directly below each line. Pay particular
letteringmustbemadeclean-cutanddark. attention to thespacingofletters andwords.
Exercises 1-5. Usingasharp F pencil, duplicate on the right side Exercise3. Proceedas in Exercise2; useasharp F pencil.
theinformationshown,includingarrowheadsandfinishmarks.
Exercise6. Reproducethetideshowninthespaceprovidedatthe Drawing C-1. Use ofT-Square and Triangles. References: Sees.
right. Paypanicularattentiontotheaccuratecenteringofeach 4.1-4.14,4.17,4.18. Beforefasteningthissheetandsubsequent
lineofletteringin thetitle,aboutthegivenvenicalcenterline. sheets to the drawing surface, align the sheet horizontally by
adjusting the sheet so thatone oftheprincipal horizontal lines
DrawingA-3.VerticalLowercaseLettering. References: Sees. 5.7, coincideswith theupperedgeoftheT-square. Fasten thesheet
5.10, 5.14. All necessaryguide lines have been provided. Note to thedrawingsurfacewith draftingtape.
theadditional horizontal guide lines forlowercase lettering. All Spaces 1, 3, 5, and7. Draw thickparallel lines beginningat the
letteringmust bemadeclean-cutanddark. startingmarks.UseasharpFpencil,andgooverthelinesuntil
Exercise I. Usinga medium sharp HB pencil, letter the charac- the thickness matches that ofthe printed lines. The lines in
tersshowninthespacesprovided.Usethestrokesshown,but Space1aredrawnhorizontal.TheinclinationoflinesinSpace
omitthearrows andnumbers fromyourletters. 3 is 45° with horizontal, upward to the right. In Space 5 the
Exercise2. Using a fairly sharp F pencil, reproduce the given inclinationis30°withhorizontal,upwardtotheright.InSpace
words in the spaces directly below each line. Pay particular 7theinclinationis60°withhorizontal, upwardto theright.
attention to thespacingoflettersandwords. Spaces2, 4, 6, and8. Draw thin parallel lines beginning at the
Exercise3. Proceedas in Exercise2; useasharp F pencil. starting marks. Use a sharp 2H pencil to draw these lines—
whichshouldbejustasdarkas thethicklines, butverythin.
DrawingB-1. InclinedCapitals andNumerals. References: Sees. The lines in Space 2 are drawn vertical. The inclination of
5.1-5.7, 5.9, 5.10, 5.12, 5.13.Allleneringonthissheetandthe lines in Space 4 is 45° with horizontal, downward to the
remainingsheets in thisworkbook is to be donefreehand. The right.InSpace6theinclinationis30°withhorizontal,down-
necessary guide lines, both horizontal and inclined, for wardtothe right. In Space8 the inclination is 60°withhor-
DrawingsB-1,B-2,andB-3havealreadybeendrawn.Notethat izontal, downward to the right.
the horizontal guide lines control the height ofthe characters In the title strip, using a 4H pencil, draw very light horizontal
and that the randomly-spaced inclined guide lines serve simply guide lines from the starting marks under DRAWN BYand ran-
as an aid inkeepingthecharacters uniformlyinclined. dom vertical or inclined guide lines as assigned. Using a sharp F
Exercise 1. Usinga medium sharp HB pencil, letterthe charac- pencil,letteryournamewiththelastnamefirst. UnderFILENO.,
ters shown in the spaces provided. These letters and numer- letterthe identification symbol assigned byyourinstructor.
als may first be sketched lightly, and then corrected where
necessary, before being made clean-cut and dark using the DrawingC-2.AlphabetofLines.References:Sees.4.10,4.14-4.16.
strokesshown.Omitthearrowsandnumbersfromyourletters. Space 1. Beginningat thestartingmarks, reproduce each ofthe
Exercise2. Using a fairly sharp F pencil, reproduce the given given lines in the space directly below each line. Use an F
words and numerals in the spaces directly below each line. pencil forthethickand mediumweightlinesanda2H pen-
Payparticularattention to thespacingoflettersandwords. cil forthethin lines.
space2. Beginning at the starting marks, draw parallel visible Space5.Reference: Fig.6-22.Usingtheconcentric-circlemethod,
linesat 15° with horizontal, upward to the right. complete the view ofthe semi-elliptical Arch. Locate a mini-
Space3. Beginning at the starting marks, draw parallel hidden mum of 10 points to establish the curve. Using the irregular
lines at75° with horizontal, downward to the right. curve, drawasmoothdarkcurvethrough theplottedpoints.
Space4. BeginningatthestartingmarksandusingtheT-square
and triangle, drawsection lines parallel to thegiven lines. Drawing D-3. Geometric Constructions. References: Sees. 6.1-
Space5. BeginningatthestartingmarksandusingtheT-square 6.3. All construction lines used to solve problems on this sheet
and triangle, drawextension lines perpendicular to thegiven are tobedrawn verylight (4H pencil) andare not tobeerased.
centerline. Addcenterlineswhere necessaryand indicateall tangentpoints
with lightdashes.
Drawing C-3. Scales and Layout. References: Sees. 4.19-4.23, Space1. Reference:Fig.6-18.CompletetheviewoftheBracket.
4.33-4.35,8.1-8.6. Space2. References: Figs. 6-17, 6-18. Complete theviewofthe
Space 1. Use the architects or engineers scale as necessary. Index Finger.
MeasurelinesAthrough Fatthescales indicated, and record Space3. References: Fig. 6-19 (a) and (b). Completetheviewof
the measured lengths in the appropriate spaces in the table the Hinge.
provided.AtG through M, drawlinesofspecified lengthsat Space4. References: Fig. 6-19 (a) and(b).Completetheviewof
thescalesshown. Terminateeach linewithashort, thin,ver- the GuideArm.
tical dash similar to the given lines above. At N through P, Space5. Reference:Fig.6-19(c).CompletetheviewoftheRollers.
determine the scales and lengths of lines and record this Space6. Reference: Fig. 6-19 (c). CompletetheviewoftheLever.
information in theappropriatespaces in the tableprovided.
Spaces2and3- Usingthestartingcornersanddimensionsgiven, Drawing E-1. Two-View Drawings. References: Sees. 4.1, 4.10,
draw the viewsshown to the scales specified. Yourfinal lines 4.19,4.24-4.29,7.8, 8.1-8.7. Usingthestartingcornersshown,
shouldbevisiblelineweight. Omitalldimensions,extension reproduce the two-view drawings full-size. Final line weights
lines, and dimension lines. Note that the scale in Space 2 is shouldconform to thestandardalphabetoflines. Omitdimen-
full-sizeandthatthescaleinSpace3ishalf-size. Donotscale sions. Do notscale the reduced drawings.
the reduced drawings.
DrawingE-2. Three-ViewDrawings. (Findworksheet in section
Drawing C-4. Layout and Use of Compass. References: Sees. ofwhitevellum pages.) References: Sees. 4.1, 4.10, 4.19, 4.24-
4.24-4.29, 4.34, 4.35. (Findworksheet in section ofwhitevel- 4.29, 7.10, 8.1-8.6, 8.10. Using the starting corners shown,
lum pages.) Using the starting corners and dimensions given, reproduce the threeviews ofthe Bracket to the scale indicated.
draw the views shown to the scales specified. Your final lines Final line weights should conform to the standard alphabet of
should be visible line weight. Omit all dimensions, extension lines. Omit dimensions unless assigned. If dimensions are
lines, dimension lines, and notes. Note that the scale in Spaces required, use \" high lettering, venicalorinclined, as assigned.
1 and 2 is Rill-sizeand that thescale in Space3 ishalf-size. Do Do notscale thedrawing.
notscale the reduceddrawings.
Drawing F-1. One- and Two-View Technical Sketching.
Drawing D-1. Geometric Constructions. References: Sees. 6.1- References: Sees. 2.1-2.10, 7.9. All lines on this sheet are to be
6.3. All construction lines used to solve problems on this sheet drawn freehand. Makeall final lines clean-cutanddark.
are to bedrawnverylight (4H pencil) andarenottobeerased. Spaces 1 and2. Sketch indicatedlinesovergiven lines.
Addcenterlineswhere necessary. Spaces3and4. Staning at the given corners, sketch the views.
SpaceI. References:Figs.6-2,6-3.DividetheV-rackso itwillcon- Count squares on the small sketches in order to obtain the
tainsixequallyspacedteeth.StartthefirsttoothatAasindicated. sizeoftheviews.
Space 2. References: Figs. 6-6, 6-14. Locate the draw hole as Space5. Startingatthegivencorner,sketchthetwoviews.Makethe
indicated. spacingandsizethesamenumberofsquaresasinthesmallsketch.
Space3. Reference: Fig. 6-7. Locateanddrawholeasindicated.
Space4. Reference: Fig. 6-9. Complete theviewofthe triangle Drawing F-2. Isometric Technical Sketching. References: Sees.
in the newlocation. 17.1-17.5. All lines on this sheet are to be drawn freehand.
Space5. References: Figs. 6-16, 6-17. Draw the notch as speci- Make all final lines clean-cut and dark. Using the starting cor-
fied, andcomplete theview. nersgiven,reproducethetwoisometricsketchesontheenlarged
Space 6. Reference: Fig. 6-13 (c). Complete the view of the grid, countingsquares toobtain the size.
Square HeadWrench.
Drawing F-3. Oblique Technical Sketching. References: Sees.
Drawing D-2. Geometric Constructions. References: Sees. 6.1- 17.18, 17.19. All lines on this sheet are to be drawn freehand.
6.3. All construction lines used to solve problems on this sheet Make all final lines clean-cut and dark. Using the startingcor-
areto bedrawn verylight (4H pencil) andarenotto beerased. ners given, reproduce the two obliquesketches on theenlarged
Addcenterlineswhere necessary. grid, countingsquares to obtain thesize.
Space 1. References: Fig. 6-13 (m) and (n). Complete the view
ofthe traffic sign to thescalespecified. Omit lettering. Drawing G-1. Identification of Surfaces. References: Sees. 7.1-
Space2. References: Fig. 6.13 (0 and (g). Draw theviewofthe 7.5, 7.17, 8.11-8.13. In each ofthe three problems the various
Hexagon Patio Block to thescalespecified. surfacesareidentifiedbylettersontheisometricdrawingandby
Space3.Reference:Fig.6-7.CompletetheviewoftheCoverPlate. numbers on the three views. In the table, letterwith a sharp F
Space 4. Reference: Fig. 6-23. Using the approximate ellipse pencilthenumberscorrespondingtothelettersgivenattheleft,
method, complete theviewofthe Cam thathas a majoraxis usingtheguide lines provided.
of3^ "inlengthalongthehorizontalcenterline,andaminor
axis of2" in length alongthevertical centerline. Drawing H-1. Six Principal Views. References: Sees. 7.3-7.7,
7.14-7.17, 8.11-8.15. Sketch the views as indicated. Make all DrawingH-13. Three-ViewMechanical Drawing. (Worksheetin
linesclean-cutanddark. Inthespaceprovided,letterthenames vellum section.) References: Sees. 7.1-7.7, 7.10, 7.12, 7.14-7.18,
ofthe necessaryviews. 8.8-8.15, 8.17, 8.18, 10.7, 10.10, 11.3. Using instruments and
the starting corners given, draw the front, top, and right side
Drawing H-2. Six Principal Views. References: Sees. 7.3-7.7, views ofthe Slide Bracket. Note that the scale ofthe drawing is
7.14-7.17, 8.11-8.15 Sketch the views as indicated. Make all half-size. Omitdimensions unlessassigned. Showfinish marks.
linesclean-cutanddark. Inthespaceprovided,letterthenames
ofthenecessaryviews. DrawingJ-1. Dimensioning. References.: Sees. 10.1-10.25, 11.1-
11.19. Add dimensions, using instruments andspacingdimen-
DrawingH-3. SketchingViewsandIsometrics. References: Sees. sion lines I" from theviewsand |" apart. Use |"letteringand
7.11,7.17,8.11-8.15, 17.3-17.5, 17.7. Sketchtheviewsasindi- guide lines forfiguresand notes.
cated, spacingtheprincipalviewsthreesquaresapart. Makesall Problem 1. Dimension the views, but use the letters Sand L,
final lines clean-cutanddark. instead of numerals, to represent size and location dimen-
sions. The small hole is a drilled hole. Since the material is
DrawingH-4. SketchingViewsandIsometrics. References: Sees. cold rolled steel (CRS), the object is understood to be fin-
7.11,7.17,8.11-8.15, 17.3-17.5, 17.7.Ineachoftheproblems, ishedallover (FAO). Finish marksare not necessary.
afrontanda right-sideviewandan incomplete isometricofan Problem 2. Dimension the views completely, including finish
objectare given. Studythe twoviews andcomplete the isomet- marks. The twosmall holes aredrilled. Thescale is full-size.
ric sketch. Then, using the starting corners given, add the top
views. Make all final lines clean-cutanddark. DrawingJ-2. Dimensioning. References: Sees. 10.1-10.29, 11.1-
11.19. Add dimensions, using instruments and spacingdimen-
Drawing H-5. Missing Lines. References: Sees. 7.3-7.5, 7.11, sionlines I"fromtheviewsand g" apart. Use |" letteringand
7.14-7.18, 8.8, 8.10-8.14. In each ofthe problems, lines (visi- guidelinesforfiguresandnotes. Sincethematerialspecifiedfor
ble,hidden,orcenterlines)aremissingfromoneormoreviews. both problems is cold rolled steel (CRS),theobjects are under-
Addallmissinglines, freehandorwithinstruments, asassigned. stoodtobefinishedallover(FAO).Finishmarksarenotnecessary.
Problem 1. Add complete dimensions. For the hole, use the
DrawdngH-6. MissingLines. References: Sees. 7.3-7.5,7.11, 7.14- note: .749-.750 REAM. Thescale is full-size.
7.18, 8.8, 8.10-8.15, 8.17. Ineachoftheproblems, lines (visible, Problem2.Addcompletedimensions. Thescale ishalf-size.
hidden, orcenterlines) aremissingfromoneormoreviews.Add
allmissinglines, freehandorwithinstrumentsasassigned. DrawingJ-3. Dimensioning. References: Sees. 10.1-10.29, 11.1-
11.19. Adddimensions, usinginstruments andspacingdimen-
Drawing H-7. Missing Views. References: Sees. 7.3-7.5, 7.10, sionlines I" fromtheviewsand |"apart. Use \" letteringand
7.11, 7.14-7.18, 8.8, 8.11-8.15, 8.17, 8.18. In each problem guidelines forfigures and notes. The fillets and rounds in both
two completeviews are given and a third view is missing. Add problems are \R.
the thirdviewin eachcase freehand. Problem 1. Dimension the views completely, including finish
marks. Forthecircularhole, use the note: .812-.813 REAM.
Drawing H-8. Missing Views. References: Sees. 7.3-7.5, 7.10, Problem2. Dimensiontheviewscompletely,includingfinishmarks.
7.11, 7.14-7.18, 8.8, 8.11-8.15, 8.17, 8.18, 10.7, 10.10, 11.3. Thelargecentralholeisdrilled.Givethedepthofthisholeinthe
Ineachproblemtwocompleteviews aregivenandathirdview note.Thetwosmallholesarealsodrilled.Thescaleishalf-size.
is missing. Add the thirdview in each case, using instruments.
In problem 5 the fillets and rounds are gRand may be drawn DrawingJ-4. Dimensioning. References: Sees. 10.1-10.29, 11.1-
freehand. Also, showfinish marks in the frontview. 11.19. (Worksheet in vellum section.) Add dimensions, using
instruments and dimension lines g" from the views and g"
Drawing H-9. Missing Views. References: Sees. 7.3-7.5, 7.10, apart. Use ^"letteringandguidelinesforfiguresandnotes.The
7.11, 7.14-7.18, 8.8, 8.11-8.15, 8.17, 8.18. In each problem smaller hole in the center is reamed. Use the note: .749-.750
two completeviews are given and a third view is missing. Add REAM. The large hole in the center is counterbored. Give the
thethirdviewin eachcase, usinginstruments. depthofthecounterboreinthenote.Thesmallholeon theleft
sideoftheobjectisdrilled. Filletsand roundsare |R.Addfin-
Drawing H-10. Missing Views. References: Sees. 7.3-7.5, 7.10, ish marks. Thescale is ftill-size.
7.11,7.14-7.18, 8.8,8.11-8.15,8.17, 8.18. (Findworbheetin
section ofwhite vellum pages.) In each problem two complete Drawing K-1. Sectional Views. References: Sees. 12.1-12.4.
views are given and a thirdview is missing. Add the thirdview Using an HB pencil, sketch fiiU or halfsections as indicated.
in each case, usinginstruments. Make section lines thin to contrast well with the heavy visible
lines, spacingthemapproximately 32 apart. Makeall final lines
Drawing H-IL Missing Views. References: Sees. 7.3-7.5, 7.10, clean-cutanddarkso that thesketcheswill stand out from the
7.11, 7.14-7.18, 8.8, 8.11-8.15, 8.17, 8.18. In each problem grid lines. Omitcuttingplanes unless assigned.
two complete views are given and a third view is missing. Add
the thirdviewin each case, usinginstruments. DrawingK-2.SectionalViews. References;Sees.12.1-12.4.Ineachprob-
lemallsectioned-iinedareasareshowncompletely.Addallmissing
Drawing H-12. Missing Views. References: Sees. 7.3-7.5, 7.10, lines, freehandormechanicallyasassigned, tothesectionedviews,
7.11, 7.14-7.18, 8.8, 8.11-8.15, 8.17, 8.18, 10.7, 10.10, 11.3. includingcenterlines.Omithiddenlinesinthesectionedviews.
Ineach problem twocompleteviewsaregivenandathirdview
is missing. Add the thirdview in each case, using instruments. Drawing K-3. Sectional Views. (Worksheet in vellum section.)
In problem 3 the fillets and rounds are |Rand may be drawn References: Sees. 12.1-12.4. Drawtheindicatedsectionalviews,
freehand. Also, showfinish marks in the topview. using instruments. In Problem 2 the fillets and rounds are gR.
Add finish marks to all views in Problem 2. Omit hidden lines Problem 3. At the left are given the front, top, and right-side
in the sectioned views. Use a sharp 2H pencil for all section viewsofan object to be revolved. At the right, the right-side
lines, spacingthem approximately ^"apart. viewhas been revolved counterclockwise. Draw the resulting
front and topviews.
DrawingK-4.SectionalViews. References:Sees. 12.1-12.7,12.12. Problem 4. At the left are given the front and top views ofan
Space 1. Drawing revolved sections as indicated, using break object to be revolved. In the center the top view has been
lineson each sideofthe hexagonal section. revolvedclockwise until the lineofintersection between sur-
Space2. Drawrevolvedsections,with"S" breaksoneachsideof faces A and B will appear as a point in the right-side view.
sections. Drawtheresultingfrontand right-sideviews,anddimension
Space 3. Draw removed sections including all visible lines theangle between surfacesAand B.
behind the cuttingplane in each case, and all necessary cen-
terlines. Omit hidden lines. Drawing M-2. Primary and Successive Auxiliary Views.
References: Sees. 14.1-14.8. Using instruments, draw the indi-
Drawing K-5. Sectional Views. References: 12.1-12.6, 12.8- catedviews. Showall hidden lines.
12.12. Draw the indicated sectional views, using instruments. Problem 1.At the leftaregiven twoviews inwhich one revolu-
In all four problems fillets and rounds are \R, and should be tion has been already accomplished. In the center the object
drawn freehand. Add finish marks in all problems. Problems 1 is further revolved about a different axis. Draw the resulting
and 2 are full sections. Use a sharp 2H pencil for all section frontand right-sideviews. Rememberthe rule: Iflinesarepar-
lines, spacingthem approximately ^" apart. allelontheobject, theywillbeparallelinanyviewoftheobject.
Problem 2. The top view ofan object which has been revolved
Drawing L-1. Primary Auxiliary Views. References: Sees. 13.1- clockwise is shown. At the upper right is shown a reduced
13.6, 13.8. Sketch auxiliary views as indicated. Using an HB scale drawing ofthe object in the unrevolved position, with
pencil, makevisibleandhidden linesdarkso thattheviewswill certain necessarydimensionsgiven. Drawthe resultingfront
standoutclearlyfromthegrids.Showandlabelreferenceplanes and right-sideviews, showingall construction.
inall problems. In Problems 1 and 2 theauxiliaryviewsofonly
theinclinedsurfacesarerequired. In Problems 3 and4 theaux- Drawing N-1. Thread Nomenclature and Identification.
iliary views are to be complete, including all hidden lines. In References: Sees. 15.1-15.18. Usingtheguidelinesgiven, letter
Problems 1 and 2, number the corners ofsurfaces A and B in the appropriate information or thread notes in the spaces pro-
theauxiliaryviews thesamesizeas thosegiven. vided. Wherespace is limited, usestandardabbreviations. Each
ofthedrawings ismadetoscale, full-size, unlessotherwiseindi-
Drawing L-2. Primary Auxiliary View^s. References: Sees. 13.1- cated. Information not obvious from each drawing is given
13.6, 13.8-13.11. Add all missing lines, freehand or mechani- immediatelybelowthatdrawing.
callyas assigned, in the regularorauxiliaryviews.
DrawingN-2. Detailed Unified Threads. References: Sees. 15.1-
Drawing L-3. Primary Auxiliary Views. References: Sees. 13.1- 15.9, 15.12, 15.17, 15.18.
13.6. Usinginstruments, drawcompleteauxiliaryviewsas indi- Problem 1.Drawdetailedexternal, internal,andmatingUnified
cated. Show all hidden lines and center lines. Show and label threads as indicated. Add necessary section lining and com-
referenceplanes in all problems. plete the view. Complete the leader and add arrowhead
touchingthethreads. Thescaleofthedrawingis full-size.
Drawdng L-4. Primary Auxiliary Views. References: Sees. 13.1- Problem 2. Draw detailed Unified threads as indicated.
13.7. 13.9. Usinginstruments,drawcompleteauxiliaryviewsas Complete the leaders and add arrowheads touching the
indicated. Show all hidden lines and center lines. Show and threads. Thescale ofthe drawing is full-size.
label reference planes in all problems. In Problem 2, dimension
the angle between surfaces A and B (measure with protractor Drawing N-3. Detailed Square and Acme Threads. References:
aftertheauxiliaryviewhasbeencompleted). InProblem4,plotat Sees. 15.10, 15.11, 15.18. (Worksheetinvellumsection.) Draw
leastsevenpointsforeachcurveintheauxiliaryview. Usingthe detailedexternal,internal,andmatingSquareandAcmethreads
irregularcurve, drawasmoothcurvethrough theplottedpoints. as indicated. Add necessary section lining and complete the
views. Complete the leaders and add arrowheads touching the
Drawing L-5. Primary and Secondary Auxiliary Views. threads. The scale ofthedrawingin Problem 1 is half-size, and
References: Sees. 13.1-13.6, 13.8, 13.9, 13.11, 13.12. in Problem 2 is full-size.
(Worksheet in vellum section.) Using instruments, draw the
indicatedauxiliaryviews. Showallhiddenlinesandcenterlines. Drawing N-4. Schematic Threads and Fasteners. References:
Showandlabelreferenceplanesineachproblem. In Problem 2, Sees. 15.13-15.18, 15.20-15.22;AppendbcTable 7.
dimension the 140° angle in the primaryauxiliaryview. Problem 1. Complete the sectioned assembly by drawing the
specified thread details, using the schematic thread symbols.
DrawingM-1. PrimaryRevolutions. References: Sees. 14.1-14.5, Add necessary section lining and complete the views.
14.8. Using instruments, draw the indicated views. Show all Complete the leaders and add arrowheads where required.
hidden lines. In each problem, letter the answers to the ques- Chamferends ofexternal threads45° x threaddepth.
tions, usingtheguidelines provided. Problem2. Drawthe two boltsand nuts as indicated, using the
Problem1. Attheleftaregiventhefrontandtopviewsofanobject schematic thread symbol. Add necessary section lining and
to be revolved. At the right the front view has been revolved complete theviews.
counterclockwise.Draw the resulting top and right-sideviews.
Problem2.Attheleftaregiventhefrontandtopviewsofanobject DrawingN-5. StandardFasteners. References:Sees. 15.23-15.30,
to be revolved. At the right the top view has been revolved Appendix Tables 7, 8, 9, 10, 11, and 14.
counterclockwise. Drawtheresultingfrontandrightsideviews. Problem 1. Complete the sectioned assembly as indicated by