lesson 4

Question 1

These are essential modes and methods of entering data that, once mastered, allow
you to create measured drawings with ease.

Answer 1

Drawing aids

Question 2

Drafting Aids

Answer 2

• Limits
• Layers
• Dimensioning
• Object Snap
• Object Snap Modes
• Zoom

Question 3

These are used to set the boundaries of the drawing. The drawing boundaries are usually set to match the size of a sheet of drawing paper. This means that when the drawing is plotted and a hard copy is made, it will fit on the drawing paper.

Answer 3

Drawing limits/limits

Question 4

This is like a clear piece of paper that can be laid directly over the drawing.

Answer 4

Layer

Question 5

These are used to control the visibility of objects and to assign properties such
as color and linetype.

Answer 5

Layers

Question 6

These can be made invisible, and information can be transferred between them.

Answer 6

Layers

Question 7

Horizontal, vertical, aligned, and radial dimensions can be created with the ______ command. The type of dimension depends on the object that is selected and
the direction of dimension line.

Answer 7

DIM

Question 8

These help establish and enforce drafting standards.

Answer 8

Dimension styles

Question 9

The default dimension style is named either _____________ or ___________. It is assigned to all dimensions until you set another style as the current dimension style.

Answer 9

Standard (imperial) or ISO-25 (metric)

Question 10

This provides a way to specify precise locations on objects whenever you are prompted for a point within a command.

Answer 10

Object snap

Question 11

Object Snap Modes

Answer 11

Midpoint
Center
Node
Quadrant
Intersection
Extension
Insertion
Perpendicular
Tangent
Apparent Intersection
Nearest
Parallel
Select All
Clear All

Question 12

Snaps to the midpoint of an arc, ellipse, elliptical arc, line, multiline, polyline,
segment, region, solid, spline or xline.

Answer 12

Object Snap Mode: Midpoint

Question 13

Snaps to the center of an arc, circle, ellipse, or elliptical arc.

Answer 13

Object Snap Mode: Center

Question 14

Snaps to a point object, dimension definition point, or dimension text origin.

Answer 14

Object Snap Mode: Node

Question 15

Snaps to a quadrant point of an arc, circle, ellipse, or elliptical arc.

Answer 15

Object Snap Mode: Quadrant

Question 16

Snaps to the intersection of an arc, circle, ellipse, line, multiline, polyline, spline,
or xline and other geometrical objects. ellipse, elliptical arc, line, multiline,
polyline segment, Extended intersections are not available as a running object
snap.

Answer 16

Object Snap Mode: Intersection

Question 17

It causes a temporary extension line or arc to be displayed when the cursor is passed over the endpoint of objects, so that points can be specified on the extension.

Answer 17

Object Snap Mode: Extension

Question 18

Snaps to the insertion point of an attribute, a block, a shape, or text

Answer 18

Object Snap Mode: Insertion

Question 19

Snaps to a point perpendicular to the selected geometric object.

Answer 19

Object Snap Mode: Perpendicular

Question 20

This is automatically turned on when the object you are drawing requires that more than one perpendicular snap can be completed. An object such as a line, arc, circle, polyline, ray, xline, multiline, or 3D solid edge as an object from which to draw a perpendicular line can be used.

Answer 20

Deferred Perpendicular snap mode

Question 21

Snaps to the tangent of an arc, circle, ellipse, elliptical arc, polyline arc, or spline.

Answer 21

Object Snap Mode: Tangent

Question 22

This is automatically turned on when the object that is being drawn requires and complete more than one tangent snap. It can be used to draw a line or xline that is tangent to arcs, polyline arcs, or circles.

Answer 22

Deferred Tangent snap mode

Question 23

Snaps to the visual intersection of two objects that do not intersect in 3D space
but may appear to intersect in the current view.

Answer 23

Object Snap Mode: Apparent Intersection

Question 24

Snaps to the nearest point on an arc, circle, ellipse, elliptical arc, line, multiline,
point, polyline, ray, spline or xline.

Answer 24

Object Snap Mode: Nearest

Question 25

Constraints a line segment, polyline segment ray or xline to be parallel to another linear object.

Answer 25

Object Snap Mode: Parallel

Question 26

Turns on all running object snap modes.

Answer 26

Object Snap Mode: Select All

Question 27

Turns off all running object snap modes.

Answer 27

Object Snap Mode: Clear All

Question 28

The zoom flyout of standard tool bars has nine icons to opt:

Answer 28

a) Zoom window b) Zoom all c) Zoom dynamic d) Zoom scale e) Zoom center f) Zoom Object g) Real Time h) Zoom extends i) Zoom Previous

Question 29

This command enlarges a rectangular area of a drawing based on a defined window using the cross hair.

Answer 29

Zoom window

Question 30

This command displays the are of the drawing limits or extent whichever are greater.

Answer 30

Zoom all

Question 31

Pans and zooms using a rectangular view box.

Answer 31

Zoom dynamic

Question 32

Zooms to change the magnification of a view using a scale factor.

Answer 32

Zoom scale

Question 33

Zooms to display a view defined by a center point and a magnification value or a height.

Answer 33

Zoom center

Question 34

Zooms to display one or more selected objects as large as possible and in the center of the view.

Answer 34

Zoom object

Question 35

Zooms interactively to change the magnification of the view.

Answer 35

Real time

Question 36

Zooms to display the maximum extents of all objects.

Answer 36

Zoom extends

Question 37

Zooms to display the previous view. You can restore up to 10 previous views.

Answer 37

Zoom previous

Question 38

The zoom flyout of standard tool bars has nine icons to opt and out of these ___________ and _________ command are more useful.

Answer 38

Zoom window, Zoom all

Question 39

The zoom flyout of standard tool bars has nine icons to opt and ___________, ___________, and ___________ commands are also frequently applied for drafting

Answer 39

Zoom real time, Pan real time, Zoom previous

Question 40

These are an important concept in AutoCAD because they can be used to great effect, especially when drawings become large or complicated.

Answer 40

Selection sets

Question 41

This option is invoked by typing W in response to the "Select objects" prompt.

Answer 41

Window

Question 42

This allows you to define a rectangle using two points in exactly the same way as the RECTANGLE command.

Answer 42

Window

Question 43

This option is invoked by typing C at the "Select objects" prompt and is a variation of the Window command.

Answer 43

Crossing Window

Question 44

The ________________ box is shown as a rectangle with a solid line.

Answer 44

Window selection

Question 45

The _______________ box is shown as a rectangle with broken lines.

Answer 45

Crossing selection

Question 46

This option is invoked by typing U at the next "Select objects" prompt to remove the objects previously added.

Answer 46

Undo

Question 47

This option is invoked by typing ALL at the "Select objects" prompt. You can use this option to select all the objects in the current drawing, no picking is required. Objects on Locked or Frozen layers are not selected but objects on layers which are simply turned off are selected.

Answer 47

All

Question 48

This option allows you to draw a multi-segment line, like a Polyline. All objects which cross the fence will be selected. This option is invoked by typing F at the "Select objects" prompt.

Answer 48

Fence

Question 49

This option, invoked by typing WP is similar to the Window option except that you can define an irregular polygon shape within which objects will be selected. As with the Window option, only objects which fall entirely within the polygon will be selected.

Answer 49

Window Polygon

Question 50

When drawings become complicated it is sometimes difficult to select the particular object you want because it is either very close to or overlies another object. In such a case it may happen that the other object is selected and not the one you want. ___________ is designed to overcome this problem.

Answer 50

Object cycling

Question 51

If you make a pick whilst holding the Control (Ctrl) key down, AutoCAD will respond with ____________. If you continue to pick, each object near the pick point is highlighted in rotation. Just keep picking until the object you want is highlighted, then right-click , AutoCAD responds ___________, the required object is added to the selection set and you can continue to select more objects as normal.

Question 52

You can remove selected objects from a selection set just as easily by ___________. If you hold the Shift key down on the keyboard while picking a selected object, that object will be deselected (removed from the current selection set).

Answer 52

shift picking

Question 53

If you need to remove a more complex selection from the current selection set you should use the __________ option.

Answer 53

Remove

Question 54

When you have finished removing objects, you can return to Add mode by entering ____ at the "Remove objects" prompt.

Answer 54

A

Question 55

AutoCAD drawings are rarely completed simply by drawing lines, circles etc. Most likely you will need to Modify these basic drawing objects in some way in order to create the image you need. AutoCAD provides a whole range of modify tools such as _______, ________, ________, and ________.

Answer 55

Move, Copy, Rotate, Mirror

Question 56

If you just need information quickly, use the _________ toolbar below to go straight to the information you need or select a topic from the contents list above.

Answer 56

QuickFind

Question 57

As is usual with AutoCAD, the Modify tools can be accessed in one of three ways:

Answer 57

from the keyboard, from the pull-down menu, and from the toolbar

Question 58

This command is one of the simplest AutoCAD commands and is one of the most used. The command erases (deletes) any selected object(s) from the drawing.

Answer 58

Erase

Question 59

Aside from the undo command, you can use this command to get deleted objects back.

Answer 59

OOPS command

Question 60

If you simply want to erase the last object you created you can type ___ at the "Select objects" prompt. The last object will be highlighted and you can then select more objects or end the command.

Answer 60

L

Question 61

This command can be used to create one or more duplicates of any drawing object or objects which you have previously created.

Answer 61

Copy

Question 62

These are used to indicate the distance and direction of the copied object from the original object.

Answer 62

Base Point (P2) and Second Point (P3)

Question 63

This command allows you to mirror selected objects in your drawing by picking them and then defining the position of an imaginary mirror line using two points.

Answer 63

Mirror

Question 64

This command creates anew object parallel to or concentric with a selected object. The new object is drawn at a user defined distance from the original and in a direction chosen by the user with a pick point.

Answer 64

Offset

Question 65

This command works in a similar way to the Copy command except that no copy is made, the selected object(s) is simply moved from one location to another.

Answer 65

Move

Question 66

This command allows an object or objects to be rotated about a point selected by the user. AutoCAD prompts for a second rotation point or an angle which can be typed at the keyboard.

Answer 66

Rotate

Question 67

AutoCAD angles start at _________ and increase in a/an _________ direction.

Answer 67

3 o'clock, anticlockwise

Question 68

Remember, by default, AutoCAD angles start at 3 o'clock and increase in an anticlockwise direction. The"ANGDIR" and "ANGBASE" variables remind you of this. If you want to rotate in a clockwise direction you can enter a negative angle by using a ____________.

Answer 68

minus sign

Question 69

This command can be used to change the size of an object or group of objects.

Answer 69

Scale

Question 70

This command can be used to move one or more vertices of an object whilst leaving the rest of the object unchanged.

Answer 70

Stretch

Question 71

Although the Stretch command can be very useful, it has largely been superseded by the use of ________ which allow this sort of modification to be made much more intuitively

Answer 71

Grips

Question 72

This command can often be used instead of either the Trim or Extend commands. This can be used to either lengthen or shorten Lines, Arcs, open Polylines, elliptical Arcs and open Splines without the use of cutting or boundary edges.

Answer 72

Lengthen

Question 73

This option allows you to change the total length of a line to any value that you specify.

Answer 73

Total

Question 74

This option allows you to change a line length using a percentage. For example, a value of 50 will result in a line one half the length of the original and a value of 200 will result in a line twice the length of the original.

Answer 74

Percent

Question 75

This option can be used to extend or reduce the endpoint of a line by a given distance. The endpoint affected by the change is the one closest to the pick point when the object selection is made.

Answer 75

Delta

Question 76

This command can be used to trim a part of an object.

Answer 76

Trim

Question 77

This command is slightly more complicated than many other modify commands. To get a better understanding of how it works, draw a square, circle and line as illustrated above and then follow the command sequence below. Don't forget to watch the AutoCAD command line at each stage of the process.

Answer 77

Trim

Question 78

This command extends a line, polyline or arc to meet another drawing object (known as the boundary edge).

Answer 78

Extend

Question 79

If the line you are trying to extend does not intersect with the boundary line, you can use the ________ option to toggle Edgemode to _________ (the default is "No Extend").

Answer 79

Edge, Extend

Question 80

When the Extend command is set to ____________, the objects being extended will extend to an imaginary line through the boundary edge, irrespective of whether the extended object actually intersects with the boundary edge. This is particularly useful and can save lots of time.

Answer 80

Extend Mode

Question 81

This option can also be used with the Trim command to enable trimming to cutting edges which do not actually intersect the object to trim.

Answer 81

Edge

Question 82

This is a system variable, so any change to its value will affect both the Trim and Extend commands.

Answer 82

Edgemode

Question 83

This command enables you to break (remove part of) an object by defining two break points.

Answer 83

Break

Question 84

Sometimes you may want to select the object first and then specify the two break points. If this is the case, use the ________ option to specify the first break point. By default, AutoCAD assumes that the point used to select the object is the first break point.

Answer 84

First point

Question 85

This command enables you to create a chamfer between any two non-parallel lines as in the illustration below or any two adjacent polyline segments.

Answer 85

Chamfer

Question 86

Usually, this command is used to set the chamfer distances before drawing the chamfer.

Answer 86

Chamfer

Question 87

This option can be used to chamfer all vertexes of a polyline simultaneously

Answer 87

Polyline

Question 88

This option allows you to specify the two chamfer distances.

Answer 88

Distance

Question 89

This allows the angle between the first line and the chamfer to be specified.

Answer 89

Angle

Question 90

This is used to control whether the original lines are trimmed to the chamfer or remain as they are.

Answer 90

Trim

Question 91

This command is a very useful tool which allows you to draw an arc between two intersecting lines or adjacent polyline segments. You first need to use the command to set the required radius and then a second time to select the two lines.

Answer 91

Fillet

Question 92

This command can also be used to fillet arcs and circles.

Answer 92

Fillet

Question 93

This option also allows you to fillet all vertices of a polyline with a single command.

Answer 93

Polyline

Question 94

This command is used to explode single objects back to their constituent parts.

Answer 94

Explode

Question 95

This command is used to return blocks, polylines etc. (which may be composed of a number of component objects) back to their individual component parts. The change has no visible effect

Answer 95

Explode