What basic drawing conventions are used and why there needs to be different types of drawings in engineering?

Basic drawing conventions in engineering include standardized symbols, line types, and dimensions to ensure clarity and consistency. These conventions help communicate complex information effectively, allowing engineers, architects, and manufacturers to understand and interpret designs accurately. Different types of drawings, such as technical, architectural, and schematic drawings, are necessary to convey various aspects of a project, including functionality, aesthetics, and assembly, catering to the needs of different stakeholders throughout the design and production process.