CAD Q A Easy Asking for Help What does CAD mean

1. When drawing a circle, you must know the coordinates of the center of the circle. （

2. In polar coordinates, the polar angle value is divided into positive and negative values, and by default, the clockwise direction is positive and the counterclockwise direction is negative. （

3. In Auto CAD, the coordinates used are only relative coordinates. （

4. When setting the snapping mode of [Auto Object Snap], the more snap items you set, the more convenient the drawing will be. （×

5. When using a rectangular array to copy a graph, the row spacing and column spacing of the copied graph cannot be negative. （

2. Multiple-choice questions (2 points per question, 10 points in total).

1. In the process of operation, the input method of absolute Cartesian coordinate value is (b).

a, x, y b, l2, in Auto CAD, you can use (a) system variable to control the mirror orientation of text objects.

a、mirrtext b、mirror c、shadedge d、xbind

3. Hold down the (a) key in the keyboard and click the selected object to cancel the selection of the object.

a、shift b、ctrl c、alt d、ctrl+alt

4. Among the following drawing tools, the (b) tool can be used to draw lines of variable width.

a, straight line b, polyline c, construction line d, ray.

5. In Auto CAD, you can use (D) system variable to control the linetype ratio of the center auxiliary line.

a、shadedge b、mirror c、 mirrtext d、ltscale

From what I understand, I think my answers are all correct, but please be cautious.

1. True/False questions.

2. Multiple choice questions.

Computers and their graphics devices are used to help designers with their design work. Abbreviated as CAD.

In engineering and product design, computers can help designers with calculations, information storage, and drafting. In the design, it is usually necessary to use a computer to perform a lot of calculations, analysis and comparisons on different solutions to determine the optimal solution.

All kinds of design information, whether digital, textual or graphic, can be stored in the computer's memory or external memory, and can be retrieved quickly; Designers usually start with sketches, and the heavy work of turning sketches into working drawings can be handed over to the computer; The computer can be used to process the graphics data related to the graphics, zooming in, zooming out, translating and rotating.

Interactive technology

In computer-aided design, interactive technology is essential. Interactive CAD systems refer to the time when users use computer systems to design, and humans and machines can exchange information in a timely manner. With the interactive system, people can ideate, proof, and modify at the same time, and the display results of each operation can be seen from the graphical terminal screen at any time, which is very intuitive.

CAD (Computer Aided Technology (CAXC) Certified).

Computer aided design refers to the use of computers and their graphics devices to help designers carry out design work.

In the design, it is usually necessary to use a computer to perform a lot of calculations, analysis and comparisons on different solutions to determine the optimal solution. All kinds of design information, whether digital, textual or graphic, can be stored in the computer's memory or external memory, and can be retrieved quickly; Designers usually start with sketches, and the heavy work of turning sketches into working drawings can be handed over to the computer; The design results automatically generated by the computer can quickly make graphics, so that the designer can make judgments and modifications to the design in time; The computer can be used to process the graphics data related to the graphics, zooming in, zooming out, translation, copying and rotating.

It's very simple.

First, draw a large frame and draw a diagonal line.

Second, draw a small frame, and also draw a diagonal.

Third, select all a box and the diagonal, m command to move, the base point is the midpoint of the diagonal of the box. Move to the diagonal midpoint of another box.

Fourth, done,.

Have you ever studied? It's so easy!

Try the offset command: o+enter, enter the value you want to offset, such as 50, and then click the mouse on the inside of the rectangle to offset one of the edges by 50, four times.

The premise is that you draw the rectangle with four lines, or that the rectangle command is drawn and then exploded. Otherwise, you can also offset, but you can't offset the 300 1600 you want, you can experience it yourself.

There are two ways to quickly shrink a 400*1800 rectangle into another rectangle. However, neither of these methods can get a size of 300*1600.

Offset command. The offset command can be either inward or outward, or bidirectional. But the offset can only be one.

If you enter an offset of 50, you get a rectangle of 300*1700, and if the offset is 100, you get a rectangle of 200*1600.

Zoom command. To use scaling, you need to enter the scaling ratio, if you specify as, you will get 300*1350;If you enter, you get 355*1600.

To generate 300*1600, you can only offset it in two steps; The long side is offset by 50 and the short side is offset by 100.