Auto CAD MCQ Quiz in मराठी - Objective Question with Answer for Auto CAD - मोफत PDF डाउनलोड करा

Explanation: 

CAD:

• CAD or Computer-Aided Design is software used in computer systems by engineers, architects, drafters, artists and others to create, analyze, optimize and modify a design or even create 2D and 3D technical illustrations.
• CAD/CAM applications are used to both design a product and program manufacturing processes, specifically, CNC machining. CAM software uses the models and assemblies created in CAD software, like Fusion 360, to generate toolpaths that drive machine tools to turn designs into physical parts.
• CAD has both hardware and software components.

• The hardware components are Graphic display terminals, Computer and Keyboard etc
• The software includes computer programmes that implement computer graphics.

Additional Information

In general, a Computer-Aided Design (CAD) package has three components 

1. Design
2. Analysis 
3. Visualization

• Design: Design refers to geometric modeling, i.e., 2-D and 3-D modeling, including, drafting, part creation, creation of drawings with various views of the part, assemblies of the parts, etc.
• Analysis: Analysis refers to finite element analysis, optimization, and other number-crunching engineering analyses. In general, a geometric model is first created and then the model is analyzed for loads, stresses, the moment of inertia, and volume, etc.
• Visualization: Visualization refers to computer graphics, which includes: rendering a model, creation of pie charts, contour plots, shading a model, sizing, animation, etc.

A graphics terminal:

• ​Graphical, or graphics terminals, are a type of computer terminal that included graphics capability in addition to (or instead of) text-only displays.

Secondary storage:

• Secondary storage devices primarily refer to storage devices that serve as an addition to the computer's primary storage, RAM and cache memory. Since they always consist of non-volatile memory, they allow the user to permanently store data on them.
• Typically, secondary storage allows for the storage of data ranging from a few megabytes to petabytes. These devices store virtually all programs and applications stored on a computer, including the operating system, device drivers, applications and general user data

Plotter

• It produces vector graphics drawings.
• Plotters draw lines on paper using a pen, or in some applications, use a knife to cut a material like vinyl or leather. In the latter case, they are sometimes known as cutting plotters.

Explanation:

Some keyboard shortcut keys of AutoCAD:

Ctrl + 0

• It is used for clearing the screen (clears screen) to show only the drawing area and hides palettes and tabs. Press it again to reset the default AutoCAD interface.

Ctrl + 1

• Select an object and press Ctrl + 1 to open the properties palette which lists the properties of the object. You can use this palette to modify most of the properties of the object.

Ctrl + 2

• You can use it to open the design center palette which contains many AutoCAD blocks that can be used directly in your drawing.

Ctrl + 8

• This is used to open a quick calculator inside the AutoCAD user interface to perform simple and complex calculations using the scientific calculator and also for unit conversion calculations.

Ctrl + 9

• You can use this shortcut key to toggle the visibility of the command line. If for some reason your command line is hidden from the drawing area, then use this keyboard shortcut key to bring it back.

Explanation:

F4 is the key for 3D OSNAP.

Additional Information

The following command is used to draw geometry on AutoCAD.

Explanation:

For highly realistic rendering in architectural visualization (like a residential interior), V-Ray is the industry-preferred rendering engine.

• V-Ray Lights simulate real-world lighting behavior far better than basic lights.

• GI (Global Illumination) allows for indirect light bouncing, making shadows softer and lighting more natural.

• This combination produces photorealistic images with accurate shadows, reflections, and ambient light distribution.

Used extensively in:

• Interior design visualizations

• Product renderings

• Architectural walk-throughs

Explanation:

Explode:

• Breaks a compound object into its component objects.

• Explodes a compound object when you want to modify its components separately.

• Objects that can be exploded include blocks, polylines, and regions, among others.

• Shortcut⇒ X

Basic commands of AutoCad :

Explanation:

LW _LWELGHT / Sets the current line weight, display options, and line weight units.

Additional InformationMulti line

MLINE Command
1 Choose Draw, multiline.
(or)
2 Type MLINE at the command prompt Command: MLINE
3 Pick A point to start the multiline. Justification/Scale/Style/:
pick point
4 Pick A second point to continue the multiline. : Pick point
5 Pick The next point to continue drawing Multilines. Undo/: pick point
6 Press ENTER to end the multiline Close/Undo/: press enter
(or)
7 Type C to close the multiline back to the first point. Close/Undo/

Units

The required units and other important parameters of the drawing is set by using this command.

The minimum allowable number of layers in an AutoCAD drawing is 1

Concept:

Explanation of layers in AutoCAD:

Layers in AutoCAD are used to organize and manage different elements within a drawing. They help to control the visibility, properties, and organization of objects. Here is a detailed explanation of the layers:

• Layer 0: This is a default layer that cannot be deleted. All objects are initially placed on Layer 0 by default. It is recommended to keep the geometry and basic construction elements on Layer 0.
• Defpoints: This layer is also automatically created and is used for defining points in the drawing. Objects placed on this layer are not plotted or printed.
• User-defined Layers: In addition to Layer 0 and Defpoints, users can create their own layers to organize the drawing. These layers can be named according to the specific objects or elements they contain.

Layers can be assigned properties such as color, line type, line weight, and transparency. By assigning objects to different layers, you can easily control their visibility and make selective changes.

Each object in an AutoCAD drawing is associated with a specific layer. By changing the layer properties or turning layers on or off, you can control the appearance and visibility of different elements within the drawing.

Note: While AutoCAD allows a minimum of one layer, it is recommended to use multiple layers to better organize complex drawings and improve workflow.

Explanation:

Mirror command in Autocad:

• Type MI or mirror on the command line or command prompt and press Enter.

Additional Information

​Other different commands used in Autocad -

• L command - used to draw simple line.
• C command - used to draw a circle.
• CO command - used to copy the object
• REC command - used to draw rectangle.
• PL command - used to draw and make polyline.
• POL command - used to draw (construct) polygon.
• ARC command - used to draw (create) arc.
• AL command - used to align an object with another object.
• E command - this command is used for erase.
• EX command - this command is used to extend the object.

Explanation:

To draw rectangle on AutoCAD, the two corner points (A & B) are required.

Command: rectang

Additional Information

Basic commands of AutoCAD are as follows:

Explanation:

"Centre point of array" is the name of the point marked as 'x'.

Additional InformationArray Command:

• The array command in AutoCAD is used to make multiple copies of objects. Although you can use the copy command to duplicate objects, the array command is more flexible and precise.
• One advantage of using the array command is that it allows you to copy objects in a defined angle and exact number of copies. Therefore, you can create array in various pattern.
• For example, you can show multiple objects in a row, column, or irregular pattern such as a spiral.