Millwright Level 1 Practice Exam

What are the three main types of technical drawings?

1. Orthographic, pictorial, landscape

2. Orthographic, pictorial, schematic

3. 2D, 3D, schematic

4. Technical, artistic, architectural

The correct answer is: Orthographic, pictorial, schematic

The three main types of technical drawings recognized in engineering and manufacturing are orthographic, pictorial, and schematic. Orthographic drawings provide a two-dimensional view of an object from multiple perspectives, typically showing front, top, and side views. This allows for accurate representation of dimensions and relationships between different parts. They are foundational in design and manufacturing, as they convey precise information needed for construction or assembly. Pictorial drawings give a more realistic representation of an object, allowing viewers to see the three-dimensional form since they combine multiple viewpoints into a single image. This type of drawing helps in visualizing the object in a way that is easier to understand for those who may not be familiar with technical specifications, making it particularly useful for presentations. Schematic drawings, on the other hand, are used especially in electrical and plumbing fields, where they depict the elements of a system with symbols and lines. These drawings prioritize the functional relationships and interconnections between components rather than their physical size or appearance. This combination ensures that engineers, designers, and technicians can communicate effectively about complex systems and parts, making option B the most appropriate choice. Other options do not include all three recognized types or mix unrelated categories in technical drawings.