Thursday, April 29, 2010

Monday, April 26, 2010

Mechanical Drafting

Dimensioning:
Basic dimensioning

What are dimensions?
-Dimensions are the text that is provided with a drawing that describes the exact size and location for the features shown. Also known as size descriptions.

Why use dimensions?
-To ensure that the part made is the part you asked for.

Conversions:
1 inch = 2.54 cm
1 foot = 12 inches
1 km = 1000 cm
1000 cm= 10000 dcm = 1000000 mm

Two methods- aligned and uniondirectional
- Do not place dimensions on objects
- Do not dimension to hidden lines
- Leaders should not be drawn at horizontal or vertical angles

Friday, April 23, 2010

Thursday, April 22, 2010

Chapter 2- Quiz's 1-2

Quiz 1
1
Sketching is
A)
a quick drawing process that can be done either on the computer or by hand.
B)
a quick drawing process that is done by hand using paper and pencil.
C)
a formal drawing process that requires instruments and great accuracy.
D)
not appropriate for CAD users.

2
All of the following are basic rules for sketching except
A)
draw neatly and clearly.
B)
use color effectively.
C)
use proper perspective.
D)
draw quickly and efficiently.

3
A single object composed of one or more connected line segments and circular arcs is known as a(n)
A)
sketch.
B)
line.
C)
polyline.
D)
polygon.

4
Sketching in AutoCAD LT® is done using
A)
the SKETCH command.
B)
the 3DORBIT command.
C)
lines, polylines, circles, and arcs.
D)
a scanning technique.

5
To be tangent, two objects must
A)
share a common side.
B)
intersect at two distinct points.
C)
share a common base point.
D)
intersect at one point only.

6
Half the width of a circle, taken through the center of the circle, is its
A)
radius.
B)
diameter.
C)
circumference.
D)
area.

7
The command that creates polylines in AutoCAD LT® is
A)
POLY.
B)
POLYLINE.
C)
PLINE.
D)
POLYGON.

8
The AutoCAD LT® command that creates circular arcs is
A)
ARC.
B)
CIRCLE.
C)
SKETCH.
D)
LINE.

9
To create a curved segment in a polyline, use the
A)
Circular option of the POLYLINE command.
B)
Curve option of the PLINE command.
C)
Curve option of the POLYLINE command.
D)
Arc option of the PLINE command.

10
To create a portion of a circle, use the
A)
CIRCLE command.
B)
ARC command.
C)
CURVE command.
D)
Curve option of the POLYLINE command.

Quiz 2
1
A selection set is
A)
a named set of objects.
B)
all of the objects that are currently selected.
C)
a group of objects collected using the SET command.
D)
a window used to select objects.

2
To specify an enclosing window,
A)
pick a point to the left of the object and drag the selection window to the right diagonally to enclose the object.
B)
pick a point below the object and drag the selection window straight up to enclose the object.
C)
pick a point to the right of the object and drag the selection window to the left diagonally to enclose the object.
D)
pick any point on the object and press Enter twice to enclose it.

3
A crossing window selects
A)
only objects that are enclosed within the window.
B)
everything except objects that are enclosed within the window.
C)
only objects that cross the lines that make up the window.
D)
objects that are enclosed within the window and objects that cross the lines that make up the window.

4
To select objects by specifying an enclosing polygon window, use the
A)
CP option.
B)
WP option.
C).

BP option.
D)
CW option.

5
A selection fence selects
A)
every object it touches.
B)
all objects enclosed within the fence.
C)
all objects not enclosed within the fence.
D)
all objects enclosed within the fence as well as objects it touches.

6
When you need to select only a few objects in an area of a drawing that contains complex geometry, the best selection method is usually
A)
individual object selection.
B)
enclosing window.
C)
crossing window.
D)
selection fence.

7
The difference between the PRINT command and the PLOT command is
A)
PRINT can only be used with laser printers.
B)
PLOT can be used with either dot matrix or laser printers.
C)
PLOT can be used to create color prints.
D)
nonexistent; there is no difference between the two commands.

8
To scale a drawing to plot at exactly its dimensioned size, set the drawing scale to
A)
1:1.
B)
1:2.
C)
2:1.
D)
1:3.

9
The Extents option in the Plot area portion of the Plot dialog box tells AutoCAD LT® to plot
A)
the entire drawing.
B)
a named view of the drawing.
C)
the portion of the drawing that fits within the limits of the drawing area.
D)
the portion of the drawing that is currently displayed on the screen.

10
In plotting a drawing, the term landscape refers to printing the drawing
A)
on a diagonal to take advantage of the texture of the selected paper.
B)
on the back side of the selected paper to reduce glare.
C)
in a horizontal orientation.
D)
in a vertical orientation.

Chapter 14- Quiz's 1-4

Quiz 1
1
In manufacturing, there are three basic categories of tools and processes: those that remove material, those that add material, and those that
A)
analyze material.
B)
form material.
C)
test materials.
D)
select materials.

2
The machines that perform these processes are referred to as
A)
machine tools.
B)
manufacturing tools.
C)
forming tools.
D)
production tools.

3
The most common material-removal tools are the lathe, drill press, and
A)
shaper.
B)
grinder.
C)
band saw.
D)
milling machine.

4
The process of shaping material by forcing it through a die is
A)
forging.
B)
casting.
C)
extruding.
D)
expanding.

5
The process of shaping a workpiece using impact and pressure is
A)
dapping.
B)
forging.
C)
extruding.
D)
bending.

6
The most common manufacturing process used for adding material to a workpiece is
A)
casting.
B)
extruding.
C)
welding.
D)
forging.

7
In general, the process that produces the least accurate (roughest) surface is
A)
sawing.
B)
drilling.
C)
milling.
D)
grinding.

8
HVAC ducts are made using a process called
A)
lapping.
B)
forging.
C)
bending and shaping.
D)
extruding.

9
The primary advantage of forging a part is
A)
lower manufacturing cost.
B)
extreme precision in the finished part.
C)
the need for a minimum amount of machining.
D)
increased strength and durability of the part.

10
In selecting a machine tool for a manufacturing operation, the two most important determining factors are the amount of material that can be removed at a time and
A)
weight.
B)
accuracy.
C)
cost.
D)
speed.


Quiz 2
1
The acronym CNC stands for
A)
computer number control.
B)
consist numerical control.
C)
computer numerical control.
D)
computer numerical contact.

2
CNC equipment is programmed using
A)
programming code.
B)
Excel®.
C)
Quicken®.
D)
interpolation.

3
The CNC program tells the machine
A)
the size of the workpiece.
B)
the shape of the workpiece.
C)
the size and shape of cutter to use.
D)
how and where to move the tool.

4
The two most common types of numerical control are point-to-point and
A)
stop-and-start.
B)
continuous.
C)
open loop.
D)
closed loop.

5
The route along which the tool or cutter travels is the
A)
pattern.
B)
template.
C)
path.
D)
trail.

6
A mathematical model used to determine the best-fitting path to approximate locations and to set speeds that are appropriate is
A)
integration.
B)
interpolation.
C)
distribution.
D)
compilation.

7
The system in CNC that uses impulses or signals to determine the location of the tools is a(n)
A)
closed-loop system.
B)
critical-path system.
C)
critical-pattern system.
D)
open-loop system.

8
In a closed-loop system, the exact location of the axis is determined by the use of a
A)
contactor.
B)
sensor.
C)
capacitor.
D)
transistor.

9
Machine tool systems are mainly concerned with two types of machine tool tolerances: accuracy and
A)
repeatability.
B)
durability.
C)
cost effectiveness.
D)
ease of operation.

10
Sensors are also called
A)
locators.
B)
feelers.
C)
encoders.
D)
finders.

Quiz 3
1
AutoCAD LT® files can be exported to all of the following file formats except
A)
WMF.
B)
BMP.
C)
DWG.
D)
EPS.

2
A Windows metafile is a graphics file that
A)
contains either a vector or a raster graphic format.
B)
is commonly used to transfer graphics files from Windows to the Macintosh.
C)
automatically converts AutoCAD LT®'s vectors to a raster format.
D)
can be used with any operating system.

3
A bitmap is a graphics file that
A)
contains either a vector or a raster graphic format.
B)
is commonly used to prepare AutoCAD LT® files for use with stereolithography.
C)
creates a picture file with a raster format.
D)
contains a pure vector format.

4
Stereolithography machines are used to
A)
combine several files containing solids into a single, compact file.
B)
create a physical 3D model directly from a CAD model.
C)
break the solid model into thin slices that can be used by a PostScript printer to recreate the model.
D)
interpret 2D multiview drawings to create a physical 3D model.

5
Rapid prototypes are used for all of the following purposes except to
A)
explain a concept.
B)
form a mold to cast parts.
C)
be bolted onto an assembly to show how the finished part will work.
D)
create 2D detail drawings.

6
One type of item that can be inserted into AutoCAD LT® is a(n)
A)
Windows metafile.
B)
stereolithography file.
C)
bitmap image.
D)
OLE file.

7
The DWG file created by the EXPORT command is a(n)
A)
AutoCAD LT® block drawing file.
B)
bitmap file.
C)
Windows metafile.
D)
stereolithography file.

8
To reload an image into AutoCAD LT®, open the Image Manager window and select the
A)
Load button.
B)
Save button.
C)
Reload button.
D)
Details button.

9
To open the Image Manager, use the
A)
IMPORT command.
B)
IMAGE command.
C)
INSERTOBJ command.
D)
OPEN command.

10
The command that allows you to insert an OLE object into a drawing is the
A)
INSERT command.
B)
IMAGE command.
C)
IMPORT command.
D)
INSERTOBJ command.

Quiz 4
1
The AUDIT command
A)
opens a damaged file and attempts to fix it.
B)
checks your AutoCAD LT® file folder and flags any corrupted files.
C)
removes damaged files from your AutoCAD LT® file folder.
D)
examines the current document and fixes any errors it finds.

2
When you repair a file using the AUDIT command, the results are displayed
A)
in the AutoCAD LT Text window.
B)
in a separate text document.
C)
as multiline text at the top right corner of the drawing.
D)
in the Audit Results dialog box.

3
If AUDIT cannot repair the errors in a drawing, the next step is to try the
A)
REPAIR command.
B)
PURGE command.
C)
RECOVER command.
D)
SAVEAS command.

4
The difference between the AUDIT and RECOVER commands is that
A)
RECOVER is less capable than AUDIT.
B)
AUDIT deletes the file if it cannot repair it.
C)
RECOVER attempts the repair as you open the file.
D)
AUDIT asks for the name of the file.

5
If you run the RECOVER command on a file that contains no errors,
A)
AutoCAD LT® displays an error message.
B)
the file is not harmed in any way.
C)
the command ends without displaying a message.
D)
the file reverts to its last saved version.

6
The PURGE command works on all of the following except
A)
plot styles.
B)
blocks.
C)
xrefs.
D)
linetypes.

7
Benefits of using the PURGE command on a finished drawing include all of the following except
A)
reduce the disk space needed to store the drawing.
B)
increase file stability.
C)
reduce the amount of time it takes to open the drawing.
D)
unclutter the drawing.

8
If you accidentally purge an item that you need, you can recover it by
A)
recreating or reimporting it.
B)
using the UNDO command.
C)
selecting Unpurge from the Edit pull-down menu.
D)
entering the UNPURGE command.

9
When a file is so badly corrupted that none of AutoCAD LT®'s commands can repair it, your best option is to
A)
revert to the backup file that is automatically maintained by AutoCAD LT®.
B)
open a DOS window and use the DOS recover.exe file.
C)
start the drawing again from scratch.
D)
rename the corrupted file and try the recovery procedures again.

10
AutoCAD LT® saves backup files with an extension of
A)
exe.
B)
dxf.
C)
bak.
D)
dwg.

Monday, April 19, 2010

Journals

Week 12
Monday April 19- We are using cad to make drawings with circles
Tuesday April 20- We are still using cad to make circle drawings
Wednesday April 21- Absent ( track and field )
Thursday April 22- We did online quizzes about cad
Friday April 23- Continued online quizzes

Week 13
Monday April 26- We started a cad drawing
Tuesday April 27- CAD drawings and we took a note
Wednesday April 28- CAD drawings
Thursday April 29- CAD drawings
Friday April 30- CAD Drawings

Week 14
Monday May 3- We started doing orthographic drawings
Tuesday May 4- We continued the orthographic drawing
Wednesday May 5- We finished the orthographic drawing
Thursday May 6- Absolutely nothing
Friday May 7- Absolutely nothing

Week 15
Monday May 10- Started an orthographic drawing
Tuesday May 11- Started a new orthographic drawing
Wednesday May 12- Continued the drawing
Thursday May 13- Continued the drawing
Friday May 14- Continued the drawing

Week 16
Monday May 17- Watched a movie about the world trade center
Tuesday May 18- We took a note
Wednesday May 19- We did online tests
Thursday May 20- Nothing
Friday May 21- Absent ( Skills Canada )

Week 17
Tuesday May 25- We wrote a test
Wednesday May 26- Started working on our cranes
Thursday May 27- Working on cranes
Friday May 28- Working on cranes

Week 18
Monday May 31- Working on cranes
Tuesday June 1- Working on cranes
Wednesday June 2- Working on cranes
Thursday June 3- Working on cranes
Friday June 4- Working on cranes

Week 19
Monday June 7- Working on cranes
Tuesday June 8- Finished crane design
Wednesday June 9- Nothing
Thursday June 10- Building crane
Friday June 11- Building crane

Wednesday, April 14, 2010

What I Learned

I have learned how to use a new program called envisioneer which allows you to build houses. I liked putting objects in all the rooms and basically just making my dream house. If i had to change something about my house i would probably add more objects inside the house. If we got to do this project again i would definetely make improvements by adding more objects inside the house.

House Dimensions

Dining Room
12 x 17
204 ft²

Bedroom #1
20 x 20
400 ft²

Bedroom #2
20 x 20
400 ft²

Living Room
22 x 22
484 ft²

Bathroom
14 x 21 + 9 x 10
384 ft²

Kitchen
21 x 19
399 ft²

Laundry Room
10 x 9
90 ft²