< b="" />Sectional View:
A sectional view is a representation of an object or structure that shows a slice or cross-section of it. It is used to provide a clear and detailed understanding of the internal structure and features of a three-dimensional shape. Sectional views are commonly used in engineering, architecture, and various technical fields to illustrate the inner workings of complex objects or to highlight specific details that are not visible in a regular external view.

< b="" />Purpose of Sectional Views:
Sectional views serve several purposes, including:

1. < b="" />Clarity and Visualization: By cutting through an object, sectional views allow us to see the interior details and arrangement of components that would otherwise be hidden. This helps in visualizing the object's structure and understanding how different parts fit together.

2. < b="" />Identification of Features: Sectional views help identify specific features, such as hidden holes, internal cavities, or intricate geometries, which may be crucial for analysis, manufacturing, or maintenance purposes.

3. < b="" />Dimensional Information: Sectional views provide accurate measurements and dimensions for internal features that cannot be directly measured in an external view. This information is vital for design, manufacturing, and quality control processes.

< b="" />Types of Sectional Views:
There are different types of sectional views, each serving specific purposes:

1. < b="" />Full Section: This type of sectional view shows a cut through the entire object, revealing both the exterior and interior details.

2. < b="" />Half Section: A half section is created by cutting the object in half along a specific plane. This view is useful when the interior features on one side of the object are more important or complex than the other side.

3. < b="" />Offset Section: An offset section is used to show features that are not aligned with the central axis of the object. It helps highlight components that are positioned at an angle or are located away from the center.

4. < b="" />Revolved Section: In a revolved section, the object is sliced along an arc or curve instead of a straight line. This type of sectional view is often used to display rotational features, such as gears or turbine blades.

< b="" />Conclusion:
Sectional views play a vital role in understanding the internal structure and features of three-dimensional shapes. They provide clarity, visualization, and dimensional information that cannot be obtained from regular external views. By using different types of sectional views, engineers, architects, and designers can effectively communicate complex structures and ensure accurate analysis, manufacturing, and maintenance of objects.