What is the purpose of a construction line in technical drawings?
A Show hidden features
B Indicate motion
C Provide reference points
D Define boundaries
Construction lines are light, temporary lines used to guide the creation of the main drawing. They help establish reference points, angles, and alignments before drawing the permanent lines, ensuring the accuracy of dimensions and features in the design.
Which of the following views is used to show the full detail of an object as seen from above?
A Isometric view
B Plan view
C Section view
D Elevation view
A plan view is a top-down view of an object, representing how it would appear if seen from above. It is commonly used in architecture and mechanical drawings to show the layout and positioning of features on the top surface.
What is the function of a hidden line in engineering drawings?
A Outline visible parts
B Show non-visible features
C Indicate symmetry
D Represent a center
Hidden lines are used to represent parts of an object that are not visible in the current view. These lines are typically dashed and provide important information about features such as holes, internal structures, and other hidden components.
Which CAD tool allows for creating a smooth curve between two points?
A Spline tool
B Circle tool
C Arc tool
D Line tool
The spline tool is used in CAD software to create smooth, flexible curves that pass through or near a set of points. This tool is commonly used for designing freeform shapes, such as car bodies or architectural curves.
What is a dimensioning system that specifies tolerances in a more detailed way using symbols and terms?
A Radial dimensioning
B Basic dimensioning
C Geometric dimensioning
D Linear dimensioning
Geometric dimensioning and tolerancing (GD&T) is a system that defines the allowable variations in form, orientation, location, and runout of features in a part. It uses symbols to provide precise control over how parts fit and function together.
What is the purpose of using a phantom line in technical drawings?
A Show hidden features
B Indicate alternate positions
C Represent boundaries
D Show symmetry
Phantom lines are used to show alternate positions or states of parts, such as the movement of a component or different configurations of an assembly. These lines are composed of long and short dashes and provide clarity in complex drawings.
In an exploded view drawing, what is typically shown?
A Detailed cross-section
B Parts separated
C Complete part
D Hidden internal features
Exploded views are used to show parts of an assembly separated along the axis, illustrating how individual components fit together. These views are helpful in understanding the assembly process and are often used in manuals or assembly instructions.
What does the centerline in a drawing represent?
A Symmetry axis
B Starting point
C Boundary of object
D Direction of view
The centerline represents the axis of symmetry for circular or symmetrical parts. It helps in positioning and aligning features correctly in the design. It is often used to divide objects into equal halves for accurate construction.
What type of projection is used to create realistic 3D visualizations with depth?
A Isometric
B Perspective
C Orthographic
D Axonometric
Perspective projection creates a realistic visual effect where lines converge toward a vanishing point, mimicking human eye perception. This projection is essential in visualizations like architectural renderings, providing a sense of depth and three-dimensional space.
What is the purpose of a title block in a drawing?
A Contain drawing information
B Provide part details
C Indicate scale
D Show dimensions
The title block contains essential information such as the drawing title, part number, material specifications, scale, and the drafter’s name. It ensures that all relevant details about the drawing are easily accessible for review and reference.
Which type of view is most suitable for showing a cut section of a part?
A Sectional view
B Perspective view
C Auxiliary view
D Plan view
A sectional view is used to show a part as if it has been sliced through, revealing its internal details. This type of view is essential for understanding the internal structure of a part, like holes, cavities, or complex features that are hidden in other views.
What does a scale of 1:10 mean in a drawing?
A 10 times larger
B Actual size
C 10 times smaller
D 100 times larger
A scale of 1:10 means that the object in the drawing is represented at one-tenth of its actual size. Scales are used to fit large objects onto smaller sheets while maintaining proportionality, ensuring that every detail can be accurately measured.
What type of CAD modeling technique creates a 3D object by revolving a 2D profile?
A Solid modeling
B Revolve modeling
C Sweep modeling
D Surface modeling
Revolve modeling creates 3D objects by revolving a 2D profile or sketch around a central axis. This technique is commonly used to create cylindrical parts such as shafts, gears, and other rotationally symmetric objects.
What is the main function of a blueprint?
A Show construction details
B Provide color codes
C Create artistic visuals
D Highlight aesthetics
Blueprints are detailed technical drawings used in construction and manufacturing. They provide information such as dimensions, materials, assembly instructions, and specifications, ensuring that the final structure or product is built according to precise requirements.
Which line type is used to represent an object’s cutting plane in section views?
A Phantom line
B Visible line
C Cutting plane line
D Hidden line
The cutting plane line indicates where a section view has been made through an object. This line is usually drawn as a thick line with arrows, showing the direction of view and where the internal features are revealed in the section view.