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Blueprint Reading I
Week 1 Assignments
Read Units 1-2 in the textbook and go through the summaries for Units 1-2 posted under Week 1
of the Content on D2L.
Then complete the following assignments from the textbook by typing your answers in a Word
document. Clearly identify each unit and the question numbers. Save your document as "Week
1" and upload to the Week 1 Homework folder in the Dropbox on D2L:
1. Assignment - Unit 2: Pressure Pad on page 14
Unit 1 Instructor Notes Added to PowerPoint
Slide added b/w 2 & 3: Blueprints are a universal means of communication. That is their
primary function. To convey the vision of the Engineer to the end user.
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Nine slides added after slide 6:
In the figure below the instructor’s note compares the sheet sizes 8 ½ x 11, 11 x 17, and 17 x 22
noting how the 11” is in both A & B sheet size and the 17” is in both the B & C sheet size. Note
8 ½” x 2 = 17” and 11” x 2 = 22” See the pattern? Each print uses numbers from the smaller
size.
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In the figure below, a title block is shown with the Instructor’s Note: Let’s look at the different
parts of a standard blueprint layout. Let’s call these features parts of a “Title Block.” A title
block is everything you see in black on this screen.
In the figure below, the upper right hand section is highlighted with the Instructor’s Note: Let’s
look at the circled area in the upper right hand corner. I’ll make it larger for you in the next slide.
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In the figure below, the Instructor’s Note: in the upper right hand corner they will put the part
number. You will see that they will also place the part number in the lower right hand corner.
This is because if you print out a hard copy, and file it, it is easier to see the part number if it is at
the top of the blueprint.
In the figure below, the Instructor’s Note: It is common that a blueprint will need to be changed
in the future. You can do that by making a revision. Some companies use letters as shown here
and some use numbers as a revision level. It all depends on the drafting standards of the
company you work for. Also note the explanation for the revision change. It could be for many
reasons like: material change, location change, or size changes.
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In the figure below, the lower right hand corner of the title block is highlighted with the
Instructors’ Note: let’s look at the lower right hand corner. I’ll make it larger for you in the next
slide.
In the figure below, the Instructor’s Note: relative to the drafting standard of the company you
work for, this is the typical layout for a “Title Block.” There might be slight changes on what
goes where, but this is a good representation of what to look for on a blueprint. We will go over
each area later, but for now just try to remember where things are listed.
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In the figure below, pointing to the numbers on the left edge of the title block and to the letter at
the bottom of the title block, the Instructor’s Note: Let’s look at the numbers and letters on the
edge of the blue print. Instructor’s Note: the letters and numbers allow you to create a mental
grid on the blueprint. If you are talking to someone on the phone, you can reference an area by
asking them to look in section “B1.” This will draw their attention to the area that you want to
discuss. Some people unofficially call these markings “bombing locations.”
Slide 19: Note the “NO. REQD 6”. You will rarely see the quantity listed on a standard
Blueprint. You will see this on a “BOM” or “Bill of Material” on an Assembly Drawing.
Unit 2 Instructor’s Notes: None.
Week 2 Assignments
Read Units 3-4 in the textbook and go through the summaries for Units 3-4 posted under Week 2
of the Content on D2L.
Then complete the following assignments from the textbook by typing your answers in a Word
document. Clearly identify each unit and the question numbers. Save your document as "Week
2" and upload to the Week 2 Homework folder in the Dropbox on D2L:
1. Assignment - Unit 3: Cam Plate on page 17
2. Assignment - Unit 4: Angle Bracet on page 20 and Corner Plate on page 21
Unit 3 Instructor’s Notes Added to PowerPoint
Slide 7: Note the center line logo. Relative to the drafting standards of the employer, you may
or may not use the “CL” logo.
Slide 8 added: Check out this short video on YouTube: Center Lines by Charles Skeen. (Terms
of Use: Please respect the copyright and terms of use displayed on the webpages in this link.)
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Unit 4 Instructor’s Notes Added to PowerPoint
Slide 8: In a CAD package, you can control the projection of the line off of the drawing.
Because most all drawings are now done on a computer, they are drawn at a 1:1 scale. The
Dimension Lines project off of the drawing relative to the size of the part. Small part – 1/16th”
Huge Part – maybe 12”! It all depends on the size of the part. Click on the hyperlink to watch a
YouTube video: Extension Lines by Charles Skeen. (Terms of Use: Please respect the
copyright and terms of use displayed on the webpages in this link.)
Week 3 Assignments
Read Units 5, 6 & 7 in the textbook and go through the summaries for Units 5-7 posted under
Week 3 of the Content on D2L.
Complete the following assignments from the textbook by typing your answers in a Word
document. Clearly identify each unit and the question numbers. Save your document as "Week
3" and upload to the Week 3 Homework folder in the Dropbox on D2L:
1. Assignment - Unit 5: Feeder Plate on page 25
2. Assignment - Unit 6: Angle Bracket on page 33 and Cross Slide on page 35
3. Assignment - Unit 7: Block Slide on page 38
Complete the following drawing assignment:
1. Make an orthographic drawing (3 views - Front, Top, Right Side) of a lego block using
the 45 degree Miter Line method as seen on page 22 in the textbook. When you are
finished, scan your drawing as a jpeg or PDF file and upload it to the Lego Block folder
in the Dropbox on D2L. If you do not have a lego to draw from, click on this link: "3D
Lego Brick." In the viewer box, click on the “View 3D button” in the lower left corner,
then click on the block and drag it around to see all sides of it (see example of the 3D
button below).
Designer note: the "#lego Brick" found at the link above was created by
Terry Todyruick and is licensed under a Creative Commons AttributionShareAlike 3.0 Unported License.
Unit 5 Instructor’s Notes Added to PowerPoint
Slide 3: Check out a short video on YouTube: Orthographic Projection Drawing Tutorial by
AutoCAD Tutorials. (Terms of Use: Please respect the copyright and terms of use displayed on
the webpages in this link.)
Unit 6 Instructor’s Notes Added to PowerPoint
Slide 6: Note the Rod and Cone. That is the focal point of the view.
Slide 8: Note the Rod and Cone. That is the focal point of the view.
Slide 10: Note the Rod and Cone. That is the focal point of the view.
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Unit 7 Instructor’s Notes Added to PowerPoint
Slide 3: Three-view drawings are also known as orthographic views.
Slide 5: Check out a short video on YouTube: Orthographic 1 by Hountou728. (Terms of Use:
Please respect the copyright and terms of use displayed on the webpages in this link.)
Week 4 Assignments
Read Units 8, 9 & 10 in the textbook and go through the summaries for Units 8-10 posted under
Week 4 of the Content on D2L.
Then complete the following assignments from the textbook by typing your answers in a Word
document. Clearly identify each unit and the question numbers. Save your document as "Week
4" and upload to the Week 4 Homework folder in the Dropbox on D2L:
1. Assignment - Unit 8: End Shaft on page 43, Flanged Sleeve on page 45, and Cover Plate
on page 47
2. Assignment - Unit 9: Shoulder Pin on page 51 and Pump Spacer on page 53
3. Assignment - Unit 10: Shaft Support on page 57
4. Complete the Print Reading-Match Part activity posted under Week 4 of the Content on
D2L. (Designer note: The Print Reading Game was created as part of a DOL Advanced
Manufacturing Education Alliance grant and is licensed under a Creative Commons
Attribution 4.0 International License.)
Unit 8 Instructor’s Notes Added to PowerPoint
Slide added after slide 2: Two-View blueprints are very common in industry. As you will learn
in a later chapter on “One-View” drawings, these blueprints are most commonly associated with
what is known as the “Screw Machine Industry,” or the “Punch Press Industry.” In the Screw
Machine Industry, they are making millions of parts, most normally on a lathe style machine and
are symmetrical. In the Punch Press Industry they are working with parts that are flat. The parts
are relatively simple in the fact that you can full dimension the part in either a “One-View” or a
Two-View” blueprint. Let’s take a look at the “Two-View” method.
Unit 9 Instructor’s Notes: None.
Unit 10 Instructor’s Notes Added to PowerPoint
Slide 3: It is common to see the Auxiliary View drawn at a 45 degree angle from the
Orthographic View.
Week 5 Assignments
Read Units 11-14 in the textbook and go through the summaries for Units 11-14 posted under
Week 5 of the Content on D2L.
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Then complete the following assignments from the textbook by typing your answers in a Word
document. Clearly identify each unit and the question numbers. Save your document as "Week
5" and upload to the Week 5 Homework folder in the Dropbox on D2L:
1.
2.
3.
4.
Assignment - Unit 11 Die Shoe on page 63
Assignment - Unit 12 Gear Arm on page 69
Assignment - Unit 13 Sliding Support on page 75
Assignment - Unit 14 Coupling on page 79
Unit 11 Instructor’s Notes Added to PowerPoint
Slide 4: ASME = American Society of Mechanical Engineers
Slide 6: Due to the increased use of CAD/CAM software (SolidWorks, Creo (ProE) there is little
if any need to scale a drawing anymore. We draw them in a 1:1 ratio, then adjust our print size
when we send them to an output device (Plotter/Printer).
Slide 16: This is the preferred method of dimensioning
Slide 17: Dimensions easier to read
Unit 12 Instructor’s Notes Added to PowerPoint
Slide 6: Ø is most commonly used for Diameter
Slide 10: Note how the call out for the radius can be either inside the part drawing or outside of
the drawing. Both are acceptable methods of defining a radius.
Slide 12: Instructor’s Hint: Look for where the radius is started. Remember that a radius can
swing to the other side of the part and be the same distance from the center.
Unit 13 Instructor’s Notes Added to PowerPoint
Slide added after slide 3:
Method of dimensioning holes: Symbols
Counter Bore
Counter Sink
Depth of the Feature
Diameter
Slide 3: Notice the call out on the No.5 (.205) Drilled hole. It is common to see the number of
holes needed for the part – “3 HOLES.” Additionally, notice that the .375 holes are called out as
“REAM”. This is a method of making a very accurately sized hole by using a special tool called
a “Reamer”.
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Slide 6: Note the use of symbols
Slide 11: Angles can be listed inside or outside the arc
Unit 14 Instructor’s Notes Added to PowerPoint
Slide 4: BHC = Bolt Hole Circle
Week 6 Assignments
Read Units 15-19 in the textbook and go through the summaries for Units 15-19 posted under
Week 6 of the Content on D2L.
Then complete the following assignments from the textbook by typing your answers in a Word
document. Clearly identify each unit and the question numbers. Save your document as "Week
6" and upload to the Week 6 Homework folder in the Dropbox on D2L:
1.
2.
3.
4.
5.
Assignment - Unit 15 Base Plate on page 83
Assignment - Unit 16 Sector Pattern on page 87
Assignment - Unit 17 Dovetail Slide on page 93
Assignment - Unit 18 Cleavis Pin on page 98
Assignment - Unit 19 Spindle Shaft on page 105
Unit 15 Instructor’s Notes Added to PowerPoint
Slide 4: Base Line Dimensioning should be used whenever possible.
Allows you to avoid tolerance stack up
Slide 8: Measurements over 72 inches – use (“) symbol
Unit 16 Instructor’s Notes Added to PowerPoint
Slide 3: Also known as Upper & Lower Specification Limits (USL & LSL)
Slide 5: It is common to see the abbreviation U.O.S. in the Tolerance Box on the Title Block of a
print. This stands for “Unless Otherwise Specified”
Slide added after slide 6:
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Unit 17 Instructor’s Notes Added to PowerPoint
Slide 3: Notice how Unilateral Tolerance can go up or down in size
Slide added after slide 5:
Unit 18 Instructor’s Notes Added to PowerPoint
Slide 8: Pressing a dowel pin into a plate
Unit 19 Instructor’s Notes Added to PowerPoint
Slide 4: Society of Automotive Engineers (SAE)
Slide 9: American Petroleum Industry (API)
 Used in North Dakota in the Bakken Oil Fields
o Similar to a Buttress, but designed for the Petroleum Industry
Slide 11: Coarse thread series (Instructor’s note: UNC)
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Fine thread series (Instructor’s note: UNF)
Extra fine series (Instructor’s note: UNEF)
Nonstandard or special threads (Instructor’s note: UNS)
Instructor’s note: The “J” Thread is used by the Military. It has a radius on the
Root and Crest of the thread. You will see UNJ as the designation.
Slide 15: With CAD programs like SolidWorks and Creo/ProE, there are options as to how to
show the threads. If you are drawing them in AutoCad or by hand, use (2) Schematic. It is the
most common way to represent threads. The second most common is (3) Simplified, though that
is mainly used to represent Internal Threads, not External.
Week 7 Assignments
Read Units 20-23 in the textbook and go through the summaries for Units 20-23 posted under
Week 7 of the Content on D2L.
Then complete the following assignments from the textbook by typing your answers in a Word
document. Clearly identify each unit and the question numbers. Save your document as "Week
7" and upload to the Week 7 Homework folder in the Dropbox on D2L:
1.
2.
3.
4.
Assignment - Unit 20 Rocker Base on page 111
Assignment - Unit 21 Offset Carrier on page 119
Assignment - Unit 22 Cutter Adapter on page 125
Assignment - Unit 23 Position Shaft on page131
Unit 20 Instructor’s Notes: None.
Unit 21 Instructor’s Notes Added to PowerPoint
Slide 3: Internal Example.062 TPI over 2”
1.5-1.375 = .125
.125/2” = .062 TPI
Unit 22 Instructor’s Notes Added to PowerPoint
Slide 13: Change notes can be added to the left of the Title Block. These can also be part of the
Revision Block in the upper right hand corner of the blueprint. The drafting standard of your
company will designate where change notes are to be placed.
Unit 23 Instructor’s Notes Added to PowerPoint
Slide 7: To convert MM to Inch: MM * .03937 = Inch ex: 12.5mm * .03937 = 0.492 inches
To convert Inch to MM: Inch * 25.4 = MM ex: .500 inch * 25.4 = 12.7mm
Slide 13: You will see this icon in the title bock section of your blueprint. Note the direction of
the cone, as that is the only difference. See figure 23-3 on the next slide.
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Week 8 Assignments
Midterm Exam
Week 9 Assignments
Read Units 24 & 25 in the textbook and go through the summaries for Units 24 & 25 posted
under Week 9 of the Content on D2L.
Then complete the following assignments from the textbook by typing your answers in a Word
document. Clearly identify each unit and the question numbers. Save your document as "Week
9" and upload to the Week 9 Homework folder in the Dropbox on D2L:
1. Assignment - Unit 24 Flanged Valve on page 135
2. Assignment - Unit 25 Forged Rocker Bracket on page141
Unit 24 Instructor’s Notes Added to PowerPoint
Slide 6: This may take some time to get used to these views. Think about the quadrant you are
viewing the part from.
Slide substituted for slide 8:
The figure below shows the projection views of the object with the following text: “Instructor’s
Note: The publisher did not include an “On-Line” view of the First Angle Projection. See below
for an example.” and “Instructor’s Note: The best way to look at this view is to look through the
part and project the view to the opposite side. That is why you see the “Top View” on the bottom
panel of the orthographic view.”
Unit 25 Instructor’s Notes: None.
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Week 10 Assignments
Read Units 26 - 28 in the textbook and go through the summaries for Units 26 - 28 posted under
Week 10 of the Content on D2L.
Then complete the following assignments from the textbook by typing your answers in a Word
document. Clearly identify each unit and the question numbers. Save your document as "Week
10" and upload to the Week 10 Homework folder in the Dropbox on D2L:
1. Assignment - Unit 26 Idler Shaft Support on page 147 and Pump System Mount on page
149
2. Assignment - Unit 27 Cone Clutch page 153
3. Assignment - Unit 28 Shifter End Plate on page 159
Unit 26 Instructor’s Notes Added to PowerPoint
Slide 3: CAD Programs have all of the material cross hatchings. AutoCad has a full library, as
does ProE/Creo and SolidWorks
Slide 7: Note the direction of the arrows; that is the direction of the view the Engineer wants you
to see.
Slide 10 note added under “Show true…”: Very common on Forgings / Casting prints
Slide 11: Very common to see draft angle requirements in the Removed Section views.
Common for Mold Makers and Tool & Die Craftsmen.
Unit 27 Instructor’s Notes Added to PowerPoint
Slide 5: Note the direction of the arrow is the view that the engineer wants you to see.
Slide 11: This is where you would see the quantity required on the drawing. Normally, it is
listed in the upper RH corner in the Bill of Materials (BOM).
Slide 12: This view shows multiple quantities of the same part – 2 end plates, 2 bearing blocks,
4 hex nuts. This is the time to list “Quantity” on a blueprint.
Unit 28 Instructor’s Notes Added to PowerPoint
Slide 9: For those of you in the Machine Trades program, these datums correspond with the X &
Y axis.
Slide 13: Used in Industry when the same base part has multiple options for features. Example –
a restrictor plate in the Hydraulic/Pneumatic Industry.
Slide 15: Added under “Absolute positioning”: No tolerance stack up
Added under “Incremental positioning”: Can suffer tolerance stack up
Added to Slide 16:
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The following was added to the slide as shown below. Dimensions for Absolute Programing and
the Instructor’s Note: Whenever possible, use Absolute programming on your CNC machines.
This will help you avoid “Tolerance Stack Up” because you are using baseline dimensioning. If
you have +/- .01 on each dimension, and you use incremental programming, you could be +/- .03
by the time you drill the last hole. Absolute is a much better method.
Week 11 Assignments
Read Unit 29 in the textbook and go through the summaries for Unit 29 posted under Week 11 of
the Content on D2L.
Then complete the following assignments from the textbook by typing your answers in a Word
document. Clearly identify each unit and the question numbers. Save your document as "Week
11" and upload to the Week 11 Homework folder in the Dropbox on D2L:
1. Assignment - Unit 29 Intake Shaft Bearing Plate, page 169.
Unit 29 Instructor’s Notes Added to PowerPoint
Slide 6: Please pay close attention to the “Type of Tolerance” column. This will be of great help
to you in the future. Rumblings in Industry say that in the future, there may only be 2 symbols
needed, as they address all other states: 1) Positon, 2) Profile of a Surface. Of the “Modifying
Terms,” you will mainly see only 2 in industry: 1) MMC – 95% of the time, 2) LMC – 5% of the
time (you may see “Free State or “Restrained state” as an Inspection criteria in the “Notes”
section of the title block).
Slide 14: Pay close attention to this page
Slide 18: A good page to print out and keep for reference
Week 12 Assignments
Read Units 30 - 33 in the textbook and go through the summaries for Units 30 - 33 posted under
Week 12 of the Content on D2L.
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Then complete the following assignments from the textbook by typing your answers in a Word
document. Clearly identify each unit and the question numbers. Save your document as "Week
12" and upload to the Week 12 Homework folder in the Dropbox on D2L:
1.
2.
3.
4.
Assignment - Unit 30 Fixture Slide Block on page 177
Assignment - Unit 31 Welded Slide Bearing Support on page 185
Assignment - Unit 32 Circuit Cover on page193
Assignment - Unit 33 Rotary Index Table page199
Unit 30 Instructor’s Notes Added to PowerPoint
Slide 6: NC is rarely seen since 1985
Slide 8: In the CNC world, the “Z” axis is always associated with the spindle.
Slide 23: FMS Systems are becoming more common in manufacturing where several product
lines go across a similar process. Example – Horizontal Machining Center: A large
Manufacturer, based in Minnesota, has a FMS that holds dozens of different tooling fixtures. All
of the programs are loaded, the tools are stored in a tool magazine. All the Engineer needs to do
is punch in the correct part number, the CNC controller calls up the correct fixture, and you are
ready to make parts. This is as close to a “Zero Set Up Time” process that you will find in
Industry. The down side – they cost Millions of dollars.
Unit 31 Instructor’s Notes Added to PowerPoint
Slide 2: Welding Standards are controlled by the American Welding Society (AWS)
Slide 5: 2 most commonly used welding practices are Fusion and Resistance
Slide 7: Watch the YouTube Video: Hobart Institute – Blueprint Reading for Welders and Fitters
by HobartInstitute1. (Terms of Use: Please respect the copyright and terms of use displayed on
the webpages in this link.)
Unit 32 Instructor’s Notes Added to PowerPoint
Slide 6: Note the same process of using projection lines as in Unit 5
Slide 9: Bend allowance known as a “K” Factor”
Unit 33 Instructor’s Notes Added to PowerPoint
Slide 9: Reference Unit 1
Slide 10: Number of parts to be made (Instructor’s note: Mainly found in the Bill of Material,
not on the piece part drawing)
Slide 11: Part weight (Instructor’s note: Not commonly shown in the title block)
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Week 13 Assignments
Read Units 34 - 39 in the textbook and go through the summaries for Units 34 - 39 posted under
Week 13 of the Content on D2L.
Then complete the following assignments from the textbook by typing your answers in a Word
document. Clearly identify each unit and the question numbers. Save your document as "Week
13" and upload to the Week 13 Homework folder in the Dropbox on D2L:
1. Assignment - Unit 34 Punch Plate on page 213 and Tee Slide on page 125
2. Assignment - Unit 35 Shaft on page 219
3. Assignment - Unit 36 Tool Block on page 227
There are no homework assignments for chapters 37 - 39.
Unit 34 Instructor’s Notes Added to PowerPoint
Slide 2: Another common name for sketching is called a “Bar Napkin Drawing.” As the name
implies, you may come up with an idea, while not sitting in front of your computer. The goal is
to communicate our idea. Sometimes, the closest thing for us to sketch out idea on, may be a Bar
Napkin.
Slide 7: You may find these examples silly, until you look at some of our handwriting skills.
Because everyone now uses a computer, we are losing the ability to freehand write and draw.
Unit 35 Instructor’s Notes Added to PowerPoint
Slide 10: Believe it or not, but this is a handy trick for making a circle.
Unit 36 Instructor’s Notes Added to PowerPoint
Slide 4: Page forward to look at Figure 36-2. It will help you visualize what the author is trying
to get across.
Unit 37 Instructor’s Notes Added to PowerPoint
Slide 2: Remember – The reason that you are learning to sketch is to communicate your vision
to someone else.
Slide 6: Step 3 really helps
Slide 10: This is hard to do effectively freehand. It takes time and practice.
Unit 38 Instructor’s Notes: None.
Unit 39 Instructor’s Notes: None.
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Week 14 Assignments
Read Units 40 - 44 in the textbook and go through the summaries for Units 40 - 44 posted under
Week 14 of the Content on D2L.
Then complete the following assignments from the textbook by typing your answers in a Word
document. Clearly identify each unit and the question numbers. Save your document as "Week
14" and upload to the Week 14 Homework folder in the Dropbox on D2L:
1. Assignment - Unit 40 Rocker Fixture on page 245.
There are no homework assignments for chapters 41 - 44.
Unit 40 Instructor’s Notes Added to PowerPoint
Slide 4: Note how oblique’s front face is square to the world. See how the Isometric is at a 30
degree angle to the world.
Unit 41 Instructor’s Notes: None.
Unit 42 Instructor’s Notes Added to PowerPoint
Slide 3: This is the single difference in what you have learned in the earlier chapters. The most
important thing to realize is that the Isometric drawing is drawn at a 30 degree angle. Start with
a flat line, draw a line at 30 degrees, and get started. See Figure 42-2 on slide 7.
Slide 7: See Figure 42-3 on Slide 11 before you start
Unit 43 Instructor’s Notes: None.
Unit 44 Instructor’s Notes Added to PowerPoint
Slide 2: Remember the discussion on a “Bar Napkin” drawing?
Figures on slides 4 & 5 were combined on to one slide and note added: Don’t see any
difference? Look at the 2” dimension. The only difference is the orientation of the numbers.
Week 15 Assignments
Final Exam
Unless otherwise noted, HTC MACH1056 Blueprint Reading I by J.E. Dotterer, MAAC
Program at Hennepin Technical College, is licensed under a Creative Commons Attribution 4.0
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