Engineering Graphics & Design (B.Tech) - Lab Experiment 1 - Introduction to Engineering Drawing

Oct 28, 2026

Lab Experiment-1 introduces engineering drawing for B.Tech Semester I, explaining what engineering drawings are and why they matter in manufacturing. The material covers engineering drawings as technical drawings that communicate shape, dimensions, tolerances, accuracy, and design intent to production, assembly, vendors, and other departments. It details core components and common line types, including continuous, hidden, center, dimension/extension, break, phantom, section, cutting plane, and leader lines, alongside the roles of different engineering views such as isometric, orthographic, and section views.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages31

Reading Time1 h 18 min

AccessFree to download

List of Experiments

Introduction to Engineering Drawing

Objective

Brief Discussion and Explanation

What is an engineering drawing?

Basic components of engineering drawing

Types of lines in engineering drawings

Types of views in engineering drawings

Isometric view

Orthographic view

Section view

MINING ENGINEERING LAB MANUAL ENGINEERING GRAPHICS & DESIGN (B.TECH) SEMESTER I LIST OF EXPERIMENTS | S.No. | NAME OF EXPERIMENTS | REMARKS | | --- | --- | --- | | 1. | Introduction to Engineering Drawing | | | 2. | To study Orthographic Projections | | | 3. | To study Isometric Projections | | | 4. | To study Projection of Point | | | 5. | To study Projection of Line | | | 6. | To study Projection of Plane | | | 7. | To study Projection of Solids | | | 8. | To study Projection of Section of Solids | | | 9. | To study Projection of Development of Surfaces | | | 10. | To study Projection of Scales | | LAB EXPERIMENT-1 OBJECTIVE Introduction to Engineering Drawing. BRIEF DISCUSSION AND EXPLANATION What is an engineering drawing? An engineering drawing is a subcategory of technical drawings that show the shape, structure, dimensions, tolerances, accuracy and other requirements needed to manufacture a product or part. Engineering drawings are also known as mechanical drawings, manufacturing blueprints and drawings. An engineering drawing helps to define the requirements of an engineering part and conveys the design concept. The Engineer distributes these drawings to a manufacturing department to produce the parts, to an assembly department to put the parts together, then to any vendors, archives or other company departments. The drawings can include an item or system's geometry, dimensions, tolerances, functions, finish, hardware and material. Basic components of engineering drawing Technical drawings may have different components depending on the industry, the part and the purpose of the drawing. Types of lines in engineering drawings An engineering drawing has many different kinds of lines that indicate different concepts and design ideas. Here’s a list of the types of lines you can find in an engineering drawing: Continuous/drawing line A solid line is the most common type of line and represents an object’s physical boundaries. These are the lines used to draw objects. The line thickness can vary—thicker lines are used on the outside contour and thinner lines are used on the inner contour. Hidden line Lines that are not visible in the current view are represented by dashes. They represent the edges where surfaces meet but are not directly visible. Hidden lines tend to be omitted from drawings unless they are needed to make the drawing clear. Center line Parts with holes and symmetrical features can be shown by using center lines. A center line indicates a circular feature on a drawing and is characterized by its long-short-long alternating line pattern. They can be used to represent: 1 Symmetry 2 Paths of motion 3 Centers of circles and the axes of symmetrical parts Dimension and extension lines 1 Dimension and extension tines are thin lines used to indicate the sizes of features on a drawing. 2 Dimension lines show the orientation and extent of a specified length or size of an element. They end with arrowheads that terminate at the extension lines. 3 Extension lines are used to clarify the points at which a dimension begins and ends and extend toward the element that is dimensioned. Break line Break lines show where an object is broken to save drawing space or reveal interior features. Break lines come in two forms: A freehand thick line A long, ruled thin line with zigzags Phantom line Phantom lines are thin long-short-short-long lines used to show the travel or movement of an object or a part in alternate positions. They can also be used to show adjacent objects or features Section line Section lines are used to show the cut surfaces of an object in section views. They are fine, dark lines and are generally drawn at a 45° angle. The type of line can indicate various materials such as steel, copper and brass. Cutting plane line Cutting plane lines are heavy lines used in section drawings to show the locations of cutting planes. When using

FAQs

What is an engineering drawing and what information does it include?

An engineering drawing is a type of technical drawing that shows the shape, structure, dimensions, tolerances, accuracy, and other requirements needed to manufacture a product or part. It helps define part requirements and conveys the design concept.

Why are different line types used in engineering drawings?

Different line types represent different concepts and design ideas. For example, continuous lines show physical boundaries, hidden lines use dashes for unseen edges, and dimension/extension lines indicate sizes and measurement limits.

What are the common projection and view types mentioned for engineering drawings?

The document describes isometric drawings for 3D representation, orthographic views using front/top/side views, and section views to clarify interior construction. It also references first-angle and third-angle projection standards.

Oct 28, 2026

Upload by Anna Hans