CAD Operation Level-3 Suggestion for NSDA V-5
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CAD Operation Level-3 Suggestion for NSDA V-5
1. What is the primary purpose of the code of practice in the construction sector in Bangladesh?
- To increase construction costs
- To establish safety, quality, and sustainability standards
- To eliminate all construction regulations
- To restrict the use of local materials
2.Which government agency is responsible for regulating and issuing permits for residential construction projects in Bangladesh?
- Ministry of Education.
- Department of Agriculture.
- Department of Housing and Public Works.
- Ministry of Transportation.
3.What safety measure is essential during residential electrical installation to prevent electrical shock?
- Overloading circuits.
- Using bare wires
- Proper grounding and earthing
- Installing fewer electrical outlets
4.What type of ruler is commonly used for measuring and drawing straight lines in manual drafting?
- Compass
- Protractor
- T-square
- French curve
5.What type of drawing provides a cut-away view of a building, showing its internal details?
- Floor Plan
- Elevation drawing
- Section drawing
- Detail drawing
6.What type of line is typically used to represent the edges of objects in construction drawings?
- Dashed line
- Solid line
- Zigzag line
- Curved line
7.In which bar do you find the “Ortho & Osnap” icon?
- Draw toolbar
- Modify toolbar
- Status bar
- Object properties toolbar
8.AutoCAD draw toolbar symbol is used for:
- Polygon
- Rectangle
- Pentagon
- Construction line
9.In which bar do you find the “Snap & Grid” icon?
- Draw toolbar
- Modify toolbar
- Status bar
- Object properties toolbar
10.Which one of these would NOT be found in a good Human Computer Interaction?
- Common shortcuts, like ctrl+z for undo
- Icons that can have specific meanings
- A long command line to achieve a function
- Sounds that convey meanings
11.What is the primary purpose of AutoCAD’s 3D workspace?
- To create 3D models and designs
- To apply 2D textures to drawings
- To organize drawing layers
- To print documents in 3D
12.In AutoCAD, what is the keyboard shortcut to activate the “Orbit” command for rotating the 3D view?
- O
- R
- V
- N
13.Which navigation tool in AutoCAD allows you to move the 3D view left, right, up, or down without changing the viewpoint?
- “Orbit”
- “Zoom”
- “Pan”
- “Extrude”
14.Which AutoCAD workspace is ideal for editing and manipulating 3D surfaces?
- Drafting & Annotation
- 3D Modelling
- 3D Drafting & Annotation
- Sheet Set Manager
15.How can you convert a 3D surface into a 3D solid in AutoCAD?
- By using the “Extrude” command
- By using the “Loft” command
- By using the “Thicken” command
- By using the “Move” command
16.What does the “FACETRES” command control in AutoCAD?
- Text size
- Layer settings
- Smoothness of curved 3D surfaces
- Line thickness
17.Which command is used to create a grid of copies of a 3D object in three dimensions?
- 3D Move
- 3D Rotate
- 3D Rectangular Array
- 3D Align
18.In the adjacent figure, the front width & height view dimensions are:
- 80, 40
- 40, 20
- 80, 20
- 10, 20
19.Which file formats are commonly used for saving rendered images in AutoCAD?
- PDF and DOCX
- JPEG, PNG and TIFF
- MP3 and WAV
- DWG and DXF
20.How can you access the rendering settings in AutoCAD?
- Through the “Insert” tab
- Through the “Layer” panel
- Through the “Render” tab
- By typing “RENDER” in the command line
21.What is the difference between a rendered image and a wireframe drawing?
22.How do you create sections in AutoCAD?
23.What is the purpose of the “3D Move” command in AutoCAD?
24.How can you modify the shape of a 3D surface after creation?
25.What is the difference between a 3D surface and a 3D solid in AutoCAD?
26.How many sides does a 3D cube created with the Box command have?
27.What does “orbiting” mean in 3D modeling and navigation?
28.What is the purpose of the “UCSICON” command in AutoCAD?
29.What is the usefulness of viewports?
30.Write the abbreviation of FAR.
1.What is the primary purpose of the code of practice in the construction sector in Bangladesh?
b) To establish safety, quality, and sustainability standards
2.Which government agency is responsible for regulating and issuing permits for residential construction projects in Bangladesh?
c) Department of Housing and Public Works.
3.What safety measure is essential during residential electrical installation to prevent electrical shock?
c) Proper grounding and earthing
4.What type of ruler is commonly used for measuring and drawing straight lines in manual drafting?
c) T-square
5.What type of drawing provides a cut-away view of a building, showing its internal details?
c) Section drawing
6.What type of line is typically used to represent the edges of objects in construction drawings?
b) Solid line
7.In which bar do you find the “Ortho & Osnap” icon?
c) Status bar
8.AutoCAD draw toolbar symbol is used for:
b) Rectangle
9.In which bar do you find the “Snap & Grid” icon?
c) Status bar
10.Which one of these would NOT be found in a good Human Computer Interaction?
c) A long command line to achieve a function
11.What is the primary purpose of AutoCAD’s 3D workspace?
a) To create 3D models and designs
12.In AutoCAD, what is the keyboard shortcut to activate the “Orbit” command for rotating the 3D view?
a) O
13.Which navigation tool in AutoCAD allows you to move the 3D view left, right, up, or down without changing the viewpoint?
c) “Pan”
14.Which AutoCAD workspace is ideal for editing and manipulating 3D surfaces?
b) 3D Modelling
15.How can you convert a 3D surface into a 3D solid in AutoCAD?
c) By using the “Thicken” command
16.What does the “FACETRES” command control in AutoCAD?
c) Smoothness of curved 3D surfaces
17. Which command is used to create a grid of copies of a 3D object in three dimensions?
c) 3D Rectangular Array
18.In the adjacent figure, the front width & height view dimensions are:
a) 80, 40
19.Which file formats are commonly used for saving rendered images in AutoCAD?
b) JPEG, PNG and TIFF
20.How can you access the rendering settings in AutoCAD?
c) Through the “Render” tab
21.What is the difference between a rendered image and a wireframe drawing?
Ans: Imagine a real photograph of a house (rendered image) vs. a blueprint showing the house’s walls and beams (wireframe drawing).
একটি বাস্তব বাড়ির ছবি (রেন্ডার করা ছবি) বনাম একটি নীলনকশা যা বাড়ির দেয়াল এবং বিম দেখায় (তারের ফ্রেম অঙ্কন) কল্পনা করুন।
22.How do you create sections in AutoCAD?
Ans: Think of cutting a cake to see the inside layers. You use a section plane in AutoCAD to “cut” through a 3D model and reveal its internal structure.
ভিতরের স্তরগুলি দেখতে কেক কাটার কথা চিন্তা করুন। আপনি একটি 3D মডেলকে “কাটা” করতে এবং এর অভ্যন্তরীণ কাঠামো প্রকাশ করতে অটোক্যাডে একটি সেকশন প্লেন ব্যবহার করেন।
23.What is the purpose of the “3D Move” command in AutoCAD?
Ans: It’s like picking up a physical object and moving it to another location, but in 3D space.
এটি 3D স্পেসে অন্য স্থানে একটি ভৌত বস্তু তুলে নেওয়ার মতো।
24.How can you modify the shape of a 3D surface after creation?
Ans: Think of shaping clay or molding dough. You can nudge, stretch, and tweak 3D surfaces in AutoCAD to get the desired form.
কাদামাটি আকৃতি দেওয়া বা ময়দা ছাঁচানোর কথা ভাবুন। আপনি পছন্দসই ফর্ম পেতে অটোক্যাডে 3D পৃষ্ঠগুলিকে নাড়াচাড়া, প্রসারিত এবং পরিবর্তন করতে পারেন।
25.What is the difference between a 3D surface and a 3D solid in AutoCAD?
Ans: A 3D surface is like a thin sheet, while a 3D solid is like a filled box. Imagine a plastic bag vs. a solid brick.
একটি 3D পৃষ্ঠ একটি পাতলা শীটের মতো, যখন একটি 3D কঠিন একটি ভরা বাক্সের মতো। একটি প্লাস্টিকের ব্যাগ বনাম একটি কঠিন ইট কল্পনা করুন।
26.How many sides does a 3D cube created with the Box command have?
Ans: Just like a regular dice, a 3D cube in AutoCAD has 6 square faces.
একটি নিয়মিত পাশাগুলির মতো, অটোক্যাডে একটি 3D কিউবের 6 টি বর্গাকার মুখ রয়েছে।
27.What does “orbiting” mean in 3D modeling and navigation?
Ans: It’s like walking around a statue to see it from all sides. You rotate the 3D model on
your screen to inspect different angles.
এটি সমস্ত দিক থেকে দেখার জন্য একটি মূর্তির চারপাশে হাঁটার মতো। আপনি বিভিন্ন কোণ পরিদর্শন করতে আপনার স্ক্রিনে 3D মডেলটি ঘোরান।
28.What is the purpose of the “UCSICON” command in AutoCAD?
Ans: Think of it as a compass. UCSICON shows you the direction you’re “looking” at in the 3D space, helping you navigate and edit your model accurately.
এটিকে কম্পাস হিসাবে ভাবুন। UCSICON আপনাকে 3D স্পেসে আপনি যে দিকে “তাকাচ্ছেন” তা দেখায়, আপনাকে সঠিকভাবে আপনার মডেলটি নেভিগেট এবং সম্পাদনা করতে সহায়তা করে।
29.What is the usefulness of viewports?
Ans: Divide the drawing area into multiple views, each displaying a different portion of the model or different views (plan, elevation, section).
অঙ্কন এলাকাটিকে একাধিক ভিউতে ভাগ করুন, প্রতিটি মডেলের বিভিন্ন অংশ বা বিভিন্ন ভিউ (পরিকল্পনা, উচ্চতা, বিভাগ) প্রদর্শন করে।
30.Write the abbreviation of FAR.
Ans: FAR: Floor Area Ratio, a planning and zoning measure that regulates building density.
FAR: ফ্লোর এরিয়া অনুপাত, একটি পরিকল্পনা এবং অঞ্চলবিভাজন পরিমাপ যা বিল্ডিং ঘনত্বকে নিয়ন্ত্রণ করে।
Rabindra Chandra Das
In-Charge (CAD Operation)
Instructor
Bangladesh-German Technical Training Center
Mirpur-2, Dhaka-1216
Try Now: Computer Operation Level-3 Vol-5
"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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