1. Multi-view drawing is a type of technical drawing that represents an object in two or more separate views, typically showing the object from different angles. These views are typically orthographic (top, front, side, etc.) and provide a detailed representation of the object's dimensions and features. Pictorial drawing, on the other hand, is a type of drawing that represents an object in a more realistic or artistic way, often using perspective to show depth and three-dimensionality. Pictorial drawings are more visually appealing but may not be as precise as multi-view drawings for technical purposes.

2. Axonometric projection is a type of drawing where all three axes (x, y, z) are shown equally foreshortened, resulting in a more accurate representation of the object's dimensions. Oblique projection is a type of drawing where one set of parallel lines is perpendicular to the viewing plane, while the other set is at an angle other than 90 degrees, leading to potential distortion in the representation of the object. Axonometric projection maintains true scale along all axes, providing a realistic depiction, while oblique projection does not use true scale and may lead to inaccuracies in proportions.

3. Sections in technical drawing refer to views that show what an object would look like if it were cut through by an imaginary plane. Sectional views are necessary to provide additional information about the internal features and structure of an object that may not be visible in standard orthographic views. They help engineers, designers, and manufacturers understand how parts fit together and function within a larger assembly.

4. The types of sections include full section, half section, offset section, revolved section, broken-out section, and removed section. Full section shows the object as if it were cut completely through, half section shows one half as a full section and the other half in an orthographic view, offset section is used for irregularly shaped objects, revolved section is used for objects with circular symmetry, broken-out section is used to show details of a specific area, and removed section is used when a part needs to be shown separately from the main assembly.

5. Multi-view drawing is a technical drawing that represents an object in two or more separate orthographic views (top, front, side, etc.). Each view shows the object from a different angle to provide a comprehensive understanding of its shape, size, and features. Multi-view drawings are essential for communicating design intent and specifications in engineering and manufacturing.

6. Line convention refers to the standardization of line types and thicknesses used in technical drawings to convey different information about objects. Common line types include visible lines (solid lines representing visible edges), hidden lines (dashed lines representing hidden edges), centerlines (long-short-long lines indicating symmetry or centers), dimension lines (thin lines with arrowheads showing measurements), and extension lines (thin lines used to extend dimensions).

7. Auxiliary views are additional orthographic views that show an object from an angle not aligned with the primary orthographic planes (top, front, side). They are used to clarify complex shapes or features that cannot be fully represented in standard views. Auxiliary views help engineers and designers visualize how different planes intersect and provide more detailed information for accurate design and manufacturing processes. Examples of auxiliary views include inclined views, oblique views, and rotated views.