Engineering Graphics Questions and Answers for Viva

Answer-1: Engineering graphics is used to communicate design ideas and technical information in a visual format, aiding in the creation, analysis, and interpretation of engineering designs.

Answer-2: The two main types of projections are orthographic projection and perspective projection.

Answer-3: Orthographic projection is a method of representing a three-dimensional object in two dimensions by using multiple 2D views from different directions.

Answer-4: In first angle projection, the object is placed in the first quadrant, whereas in third angle projection, the object is placed in the third quadrant.

Answer-5: Isometric projection is a method of representing a three-dimensional object in two dimensions with equal foreshortening along each axis.

Answer-6: Scale refers to the ratio of the dimensions of the drawing or model to the actual dimensions of the object being represented.

Answer-7: A section view is a view that exposes internal features of an object by cutting it along a specific plane and showing the resulting cross-section.

Answer-8: Dimensioning is the process of adding numerical values to a drawing to specify the size, location, and geometric characteristics of various features.

Answer-9: A leader line is used to indicate the feature being dimensioned, while a dimension line shows the extent of the dimension and includes numerical values.

Answer-10: Auxiliary views are used to show features that are not easily visible or dimensionable in the primary views, typically by projecting them onto a plane that is perpendicular to the feature.

Answer-11: Tolerance refers to the allowable deviation from a specified dimension, indicating the acceptable variation in size or location of a feature.

Answer-12: What is meant by the term "geometric dimensioning and tolerancing" (GD&T)?

Answer-13: A title block contains essential information about the drawing, such as the title, scale, date, author, and revision history, providing context and documentation for the drawing.

Answer-14: Multiview projection is the process of creating multiple 2D views of a three-dimensional object from different perspectives to fully describe its shape and features.

Answer-15: A revolved section is created by revolving the cutting plane around the object's axis, while a removed section is cut and then displaced from the object to show internal features.

Answer-16: A datum is a theoretically exact point, axis, or plane from which dimensional measurements are made in GD&T, serving as a reference for establishing the geometric relationship of features.

Answer-17: Hatching is used to indicate the material or surface texture of an object, providing visual cues about its composition or finish.

Answer-18: Symmetry indicates that features are identical or evenly distributed about a central axis or plane, simplifying manufacturing and ensuring balance and stability in the design.

Answer-19: An exploded view shows the individual components of an assembly separated to illustrate their relationship and assembly sequence, while an assembly view shows the assembled components in their final configuration.

Answer-20: An engineering scale is a specialized ruler used in technical drawing that allows measurements to be made in different units and scales, facilitating accurate dimensioning and scaling of drawings.