What is the primary purpose of an assembly drawing in engineering?
A Artistic representation
B Part assembly guidance
C Detailed dimensions
D Freehand sketching
Assembly drawings are used to show how different parts of a mechanical system fit together. They provide details like part names, assembly sequence, and necessary tools, ensuring the proper assembly of the components in a machine or structure.
In which type of projection are parallel lines drawn at 45° to the horizontal axis?
A Oblique projection
B Perspective projection
C Orthographic projection
D Isometric projection
Oblique projection is a type of graphical representation where the object is viewed at an angle, typically 45° to the horizontal axis. This projection distorts depth, making it useful for showing how an object appears at a slanted angle.
What is the feature of a machine drawing?
A Freeform design
B Aesthetic focus
C Construction details
D Component assembly
Machine drawings focus on the detailed construction and manufacturing specifications of parts, including dimensions, material types, and tolerances. These drawings ensure that each part is made correctly for functionality, durability, and compatibility with other parts.
What does a perspective view in an engineering drawing primarily show?
A Hidden details
B Realistic 3D effect
C Part sizes
D Symmetry
A perspective view represents an object in a realistic manner, showing depth and spatial relationships. Unlike orthographic projections, it mimics how the human eye perceives objects, providing a clear understanding of the object’s shape and proportions in three dimensions.
What is the importance of section views in a drawing?
A Depict perspective
B Indicate symmetry
C Display internal features
D Show external shape
Section views are used to show internal features of an object that are hidden in standard views. By slicing through the object, section views reveal details like holes, ribs, and cavities, providing a complete understanding of the design.
In a technical drawing, what is typically shown in an exploded view?
A Part dimensions
B Part layout
C Internal details
D Assembled components
An exploded view shows how parts of an assembly are arranged in relation to each other. The parts are drawn slightly separated, making it clear how they fit together, which is essential for assembly and maintenance procedures.
What type of line is used to show the outline of visible edges of an object?
A Dashed line
B Continuous line
C Hidden line
D Center line
Continuous lines are used to represent the visible edges of an object in a technical drawing. These lines are solid and clearly define the outer boundaries of the object, making it easy to understand its shape and dimensions.
What is the key feature of a machine drawing compared to other engineering drawings?
A Representation of parts
B Artistic design
C Focus on function
D General layout
Machine drawings focus on providing specific details of individual parts that make up a machine. They include accurate dimensions, materials, tolerances, and other essential data required to manufacture and assemble the components correctly.
In CAD software, what feature is used to create a 3D model from 2D sketches?
A Extrusion
B Lofting
C Sweeping
D Revolution
Extrusion is a CAD operation used to create 3D shapes by extending a 2D sketch along a specified path. It is commonly used to create parts such as shafts, pipes, and beams, turning a 2D profile into a fully defined 3D object.
Which type of drawing is typically used to show the shape of an object in its natural position?
A Exploded view
B Sectional view
C Orthographic drawing
D Isometric drawing
Orthographic drawings provide a clear representation of an object’s shape from multiple standard views (e.g., front, top, and side). These drawings are essential for providing accurate measurements and dimensions of the object’s features.
What does a leader line connect to in an engineering drawing?
A Hidden features
B Dimensions
C Labels or notes
D Part number
Leader lines are used to connect labels or notes to specific parts of a drawing. They direct the viewer’s attention to important features, dimensions, or other details, ensuring that annotations are clearly associated with the right part of the object.
What is the purpose of using tolerances in engineering drawings?
A To add color
B To allow for variations
C To define exact measurements
D To show alignment
Tolerances in engineering drawings define the allowable variations in dimensions and geometry due to manufacturing processes. These variations ensure that parts still fit and function properly even if small deviations occur, allowing for easier assembly and reducing costs.
Which type of line in a drawing represents the center of a hole or circular feature?
A Phantom line
B Center line
C Hidden line
D Continuous line
Center lines are used to represent the axis of symmetry for circular features or the center of holes. These lines help in positioning and aligning parts during assembly, ensuring accurate placement in manufacturing.
What is the purpose of dimensioning in an engineering drawing?
A Represent aesthetic design
B Show part movements
C Provide size and location
D Indicate material types
Dimensioning provides precise information about the size, shape, and location of features in a drawing. It is crucial for ensuring that parts are manufactured correctly, as it defines the distances, angles, and overall dimensions of the object.
Which type of drawing is used to show the relationship between parts in a system or assembly?
A Assembly drawing
B Section view
C Freehand sketch
D Exploded view
Assembly drawings show how different parts fit together in a machine or system. These drawings illustrate the relative positions of components and include important details such as fasteners, part names, and assembly instructions, helping technicians and engineers assemble the product.