CAD Operation Level-3 Suggestion for NSDA V-7
Written Test CAD Operation Level-3 Suggestion V-7 by Job Edu BD
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CAD Operation Level-3 Suggestion for NSDA V-7
1.Which government agency is responsible for regulating and issuing permits for residential construction projects in Bangladesh?
a) Ministry of Education.
b) Department of Agriculture.
c) Department of Housing and Public Works.
d) Ministry of Transportation.
2.What does a double-headed arrow indicate in a construction drawing?
a) A dimension or measurement
b) A curved object
c) A hidden feature
d) An electrical circuit
3.Which command converts discrete objects in polyline?
a) Union
b) Subtract
c) Join
d) Polyline
4. What setting gradient allows us to fill an open area?
a) Gap
b) Tolerance
c) Transparency
d) Open
5.What command is used for angle?
a) Chamfer
b) Fillet
c) Offset
d) Mirror
6.What is the difference between command Plot and Print
a) Plot command prints only big plans
b) The plot command for CNC (CAM)
c) No difference
d) Print command can print up to A3 size paper
7.Whenever you save a drawing a new backup file is created which contains a file without changes, what is the extension of that backup file?
a) DWG
b) SVG
c) BAK
d) BCK
8.Polar coordinates are used mostly for drawing
a) Arc
b) Ellipse
c) Angular lines
d) None of the above
9.Which navigation tool in AutoCAD allows you to move the 3D view left, right, up, or down with changing the viewpoint?
a) “Orbit”
b) “Zoom”
c) “Pan”
d) “Extrude”
10.What keyboard shortcut in AutoCAD allows you to quickly return to a previous view or undo an orbit action?
a) Ctrl + Z
b) Ctrl + S
c) Ctrl + C
d) Ctrl + P
11.What is the primary purpose of AutoCAD’s 3D workspace?
a) To create 3D models and designs
b) To apply 2D textures to drawings
c) To organize drawing layers
d) To print documents in 3D
12.What is the primary difference between 2D and 3D surfaces in AutoCAD?
a) 2D surfaces have no depth, while 3D surfaces have depth.
b) 2D surfaces are always flat, while 3D surfaces can be curved
c) 2D surfaces are created with lines, while 3D surfaces use polygons.
d) 2D surfaces have colour, while 3D surfaces are monochromatic
13.What type of 3D object is created using the “Torus” command in AutoCAD?
a) A sphere
b) A cube
c) A donut-shaped object
d) A pyramid
14.When drawing in 2D, what axis do you NOT work with?
a) X
b) Y
c) Z
d) W
15.Which of the following is NOT a property of an object
a) Line weight
b) Measure
c) Color
d) Elevation
16.How to make a random line with an angle of 40 degrees to the x axis
a) 40 < 20
b) 20 < 50
c) 35 < 40
d) 40 < 35
17.When should I use the Block Editor
a) To write a text block
b) To fix the outer block
c) To fix dynamic blocks
d) To store it in another version of AutoCAD
18.Where should you pay attention when you are working with AutoCAD commands?
a) Drawing area
b) Status bar
c) Toolbars
d) Command window
19.Which of the following is NOT a unit of length measurement?
a) Yards
b) Parsecs
c) Microns
d) Grads
20.The origin of a drawing is at
a) 0,0
b) 1,0
c) 0,1
d) 1,1
21.What does a scale in drafting represent?
22.What is a pentagon?
23.What is a 3D interface?
24.What is the primary function of the “Union” command in solid editing?
25.How can you adjust the height and base radius of a 3D cone in AutoCAD?
26.Which AutoCAD command allows you to adjust the smoothness of a 3D surface?
27.What does the “Collate” option in printing settings do in MS Word?
28.What is the purpose of a section break in a Word document?
29.What is the difference between a system software and an application software?
30.What is SSD in computer?
1.Which government agency is responsible for regulating and issuing permits for residential construction projects in Bangladesh?
c) Department of Housing and Public Works.
2.What does a double-headed arrow indicate in a construction drawing?
a) A dimension or measurement
3.Which command converts discrete objects in polyline?
c) Join
4.What setting gradient allows us to fill an open area?
b) Tolerance
5.What command is used for angle?
a) Chamfer
6.What is the difference between command Plot and Print
c) No difference
7.Whenever you save a drawing a new backup file is created which contains a file without changes, what is the extension of that backup file?
c) BAK
8.Polar coordinates are used mostly for drawing
c) Angular lines
9.Which navigation tool in AutoCAD allows you to move the 3D view left, right, up, or down with changing the viewpoint?
c) “Pan”
10.What keyboard shortcut in AutoCAD allows you to quickly return to a previous view or undo an orbit action?
a) Ctrl + Z
11.What is the primary purpose of AutoCAD’s 3D workspace?
a) To create 3D models and designs
12.What is the primary difference between 2D and 3D surfaces in AutoCAD?
a) 2D surfaces have no depth, while 3D surfaces have depth.
13.What type of 3D object is created using the “Torus” command in AutoCAD?
c) A donut-shaped object
14.When drawing in 2D, what axis do you NOT work with?
c) Z
15.Which of the following is NOT a property of an object
b) Measure
16.How to make a random line with an angle of 40 degrees to the x axis
c) 35 < 40
17.When should I use the Block Editor
c) To fix dynamic blocks
18.Where should you pay attention when you are working with AutoCAD commands?
d) Command window
19.Which of the following is NOT a unit of length measurement?
d) Grads
20.The origin of a drawing is at
a) 0,0
21.What does a scale in drafting represent?
Ans: Hints: A scale in drafting represents the ratio between the drawing’s dimensions and the actual size.
22.What is a pentagon?
Ans: Hints: A pentagon is a polygon with five sides and five angles.
23.What is a 3D interface?
Ans: Hints. A 3D interface is a user interface that operates within a three-dimensional space, often in virtual environments, allowing users to interact with 3D objects and content.
24.What is the primary function of the “Union” command in solid editing?
Ans: The “Union” command combines multiple solid objects into a single solid.
25.How can you adjust the height and base radius of a 3D cone in AutoCAD?
Ans: Hints: You can specify the height and radius during the creation process.
26.Which AutoCAD command allows you to adjust the smoothness of a 3D surface?
Ans: Hints: The “Smooth command (SMOOTH) is used to adjust the smoothness of 3D surfaces.
27.What does the “Collate” option in printing settings do in MS Word?
Ans: Hints: When enabled, it ensures that each copy of a multi-page document is printed in the correct order. This means that all pages of one copy will be printed together, arranged in the correct sequence, before moving on to the next copy.
28.What is the purpose of a section break in a Word document?
Ans: Hints: A section break is used to divide a document into sections with different page layouts or Formatting.
29.What is the difference between a system software and an application software?
Ans: System software manages the computer’s hardware and resources, while application software performs specific tasks for the user.
30.What is SSD in computer?
Ans: Solid-state drives (SSDs) are the most common storage drives today.
Rabindra Chandra Das
In-Charge (CAD Operation)
Instructor
Bangladesh-German Technical Training Center
Mirpur-2, Dhaka-1216
"You will pass just by asking the mentioned questions, it's not like that at all, but chances are upto 80% to get common. This is just a suggestion. This question is not copied from any board question"
Computer-aided design (CAD) is the use of computers (or workstations) to aid in the creation, modification, analysis, or optimization of a design. This software is used to increase the productivity of the designer, improve the quality of design, improve communications through documentation, and to create a database for manufacturing. Designs made through CAD software help protect products and inventions when used in patent applications. CAD output is often in the form of electronic files for print, machining, or other manufacturing operations. The terms computer-aided drafting (CAD) and computer-aided design and drafting (CADD) are also used.
Its use in designing electronic systems is known as electronic design automation (EDA). In mechanical design it is known as mechanical design automation (MDA), which includes the process of creating a technical drawing with the use of computer software.
CAD software for mechanical design uses either vector-based graphics to depict the objects of traditional drafting, or may also produce raster graphics showing the overall appearance of designed objects. However, it involves more than just shapes. As in the manual drafting of technical and engineering drawings, the output of CAD must convey information, such as materials, processes, dimensions, and tolerances, according to application-specific conventions.
CAD may be used to design curves and figures in two-dimensional (2D) space; or curves, surfaces, and solids in three-dimensional (3D) space.
CAD is an important industrial art extensively used in many applications, including automotive, shipbuilding, and aerospace industries, industrial and architectural design (building information modeling), prosthetics, and many more. CAD is also widely used to produce computer animation for special effects in movies, advertising and technical manuals, often called DCC digital content creation. The modern ubiquity and power of computers means that even perfume bottles and shampoo dispensers are designed using techniques unheard of by engineers of the 1960s. Because of its enormous economic importance, CAD has been a major driving force for research in computational geometry, computer graphics (both hardware and software), and discrete differential geometry.
The design of geometric models for object shapes, in particular, is occasionally called computer-aided geometric design (CAGD).
Overview
Computer-aided design is one of the many tools used by engineers and designers and is used in many ways depending on the profession of the user and the type of software in question.
CAD is one part of the whole digital product development (DPD) activity within the product lifecycle management (PLM) processes, and as such is used together with other tools, which are either integrated modules or stand-alone products, such as:
- Computer-aided engineering (CAE) and finite element analysis (FEA, FEM)
- Computer-aided manufacturing (CAM) including instructions to computer numerical control (CNC) machines
- Photorealistic rendering and motion simulation
- Document management and revision control using product data management (PDM)
CAD is also used for the accurate creation of photo simulations that are often required in the preparation of environmental impact reports, in which computer-aided designs of intended buildings are superimposed into photographs of existing environments to represent what that locale will be like, where the proposed facilities are allowed to be built. Potential blockage of view corridors and shadow studies are also frequently analyzed through the use of CAD.
Types
There are several different types of CAD, each requiring the operator to think differently about how to use them and design their virtual components in a different manner. Virtually all of CAD tools rely on constraint concepts that are used to define geometric or non-geometric elements of a model.
2D CAD
There are many producers of the lower-end 2D sketching systems, including a number of free and open-source programs. These provide an approach to the drawing process where scale and placement on the drawing sheet can easily be adjusted in the final draft as required, unlike in hand drafting.
3D CAD
3D wireframe is an extension of 2D drafting into a three-dimensional space. Each line has to be manually inserted into the drawing. The final product has no mass properties associated with it and cannot have features directly add to it, such as holes. The operator approaches these in a similar fashion to the 2D systems, although many 3D systems allow using the wireframe model to make the final engineering drawing views.
3D “dumb” solids are created in a way analogous to manipulations of real-world objects. Basic three-dimensional geometric forms (e.g., prisms, cylinders, spheres, or rectangles) have solid volumes added or subtracted from them as if assembling or cutting real-world objects. Two-dimensional projected views can easily be generated from the models. Basic 3D solids do not usually include tools to easily allow the motion of the components, set their limits to their motion, or identify interference between components.
There are several types of 3D solid modeling
- Parametric modeling allows the operator to use what is referred to as “design intent”. The objects and features are created modifiable. Any future modifications can be made by changing on how the original part was created. If a feature was intended to be located from the center of the part, the operator should locate it from the center of the model. The feature could be located using any geometric object already available in the part, but this random placement would defeat the design intent. If the operator designs the part as it functions, the parametric modeler is able to make changes to the part while maintaining geometric and functional relationships.
- Direct or explicit modeling provide the ability to edit geometry without a history tree. With direct modeling, once a sketch is used to create geometry it is incorporated into the new geometry, and the designer only has to modify the geometry afterward without needing the original sketch. As with parametric modeling, direct modeling has the ability to include the relationships between selected geometry (e.g., tangency, concentricity).
- Assembly modelling is a process which incorporates results of the previous single-part modelling into a final product containing several parts. Assemblies can be hierarchical, depending on the specific CAD software vendor, and highly complex models can be achieved (e.g. in building engineering by using computer-aided architectural design software)
Freeform CAD
Top-end CAD systems offer the capability to incorporate more organic, aesthetic and ergonomic features into the designs. Freeform surface modeling is often combined with solids to allow the designer to create products that fit the human form and visual requirements as well as they interface with the machine.
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