What is the purpose of using section views in engineering drawings?
A Indicate symmetry
B Display external features
C Reveal internal details
D Show hidden parts
Section views are used to reveal the internal structure of a part by imagining a cut through it. These views help to display features that are hidden in other views, such as internal holes, grooves, or channels, which are critical for manufacturing and assembly.
What is the main advantage of using CAD software over manual drafting?
A Precision and accuracy
B Artistic flexibility
C Faster processing
D Aesthetic enhancement
CAD software provides high precision and accuracy in drawing and modeling. It eliminates human errors associated with manual drafting, ensuring exact dimensions, alignment, and scale. This is crucial in creating detailed and complex engineering designs.
Which of the following is used to indicate the exact size of a feature in a drawing?
A Center lines
B Dimension lines
C Projection lines
D Hidden lines
Dimension lines are used to indicate the exact size, length, or distance between features in a drawing. They are essential in ensuring that all parts of the design are created to the correct measurements during manufacturing.
In engineering drawings, what is a leader line used for?
A Connecting dimensions
B Indicating scale
C Showing part boundaries
D Pointing to features
Leader lines are used to point to and label specific features in a drawing. They help identify particular parts or components, directing attention to features such as holes, surface textures, or other important details.
What type of drawing is commonly used to represent a 3D object on a 2D surface with parallel axes?
A Plan drawing
B Perspective drawing
C Isometric drawing
D Orthographic projection
Isometric drawing is a 3D representation where the axes are drawn at equal angles, typically 30° from the horizontal. This method avoids distortion and shows the full shape and proportions of an object in two dimensions.
Which type of line is used to represent an object’s center or axis of symmetry?
A Dimension line
B Center line
C Hidden line
D Construction line
Center lines are used to indicate the center of circular objects or to show symmetry. They are crucial for correctly aligning and positioning features in a design, especially for rotating parts such as shafts or gears.
What does the term “tolerancing” refer to in engineering drawings?
A Representing part movements
B Allowing size variations
C Showing angles
D Indicating preferred materials
Tolerancing specifies acceptable variations in dimensions due to manufacturing processes. It ensures that parts fit and function correctly even when there are small deviations in size, shape, or position. Proper tolerances ensure that products can be reliably assembled and function as intended.
In CAD, what tool is typically used to create circles?
A Arc tool
B Circle tool
C Ellipse tool
D Rectangle tool
The circle tool in CAD software is used to create circular shapes by specifying the center point and radius. It is essential for designing round features such as holes, gears, and other circular components in technical drawings.
What is the purpose of using a cutting plane line in a section view?
A Separate parts
B Show the view angle
C Mark the cutting location
D Indicate the scale
A cutting plane line is used in section views to indicate where the object has been “cut” to reveal its internal details. The line shows the direction of the section view, helping engineers and manufacturers understand how parts are constructed internally.
What is the term for a CAD model that represents a 3D object by combining its solid parts?
A Solid model
B Sketch model
C Surface model
D Wireframe model
Solid modeling in CAD creates a 3D representation of an object by defining its volume and surface boundaries. It is used to design realistic models that can be analyzed for strength, motion, and assembly, making it essential in engineering and product design.
Which view is typically used to show an object as seen from the front in an orthographic projection?
A Isometric view
B Side view
C Front view
D Top view
The front view in orthographic projection is the primary view that shows the object as seen directly from the front. It provides a clear representation of the width and height of the object, which is essential for accurate dimensioning and design.
What is the function of a blueprint in engineering?
A Representing an object’s movement
B Showing detailed construction information
C Presenting artistic design
D Highlighting the material used
A blueprint is a detailed technical drawing used to communicate all necessary information about a design or construction. It includes dimensions, material specifications, assembly instructions, and any other relevant details required for building or manufacturing a product.
Which type of line is used to show the outline of visible features in a drawing?
A Solid line
B Phantom line
C Dashed line
D Center line
Solid lines represent the visible edges or boundaries of an object in a technical drawing. These lines define the external features of the part and are the most prominent in an engineering drawing, guiding the fabrication process.
What is the use of auxiliary views in technical drawings?
A Display hidden features
B Represent complex surfaces
C Show movement
D Create artistic designs
Auxiliary views are used to show features that are inclined or not aligned with the main projection planes. These views help clarify complex surfaces that cannot be represented clearly in standard orthographic projections. They are essential for accurate dimensioning and understanding of the part.
What does a dashed line represent in an engineering drawing?
A Hidden part
B Visible edge
C Center axis
D Part motion
Dashed lines represent features that are hidden from view, such as internal cavities, holes, or edges that are not directly visible in a particular view. They provide important information to fully understand the object’s structure without needing extra views.