NABTEB Technical Drawing Past Questions And Answers (Objective and Theory)
Section A: Technical Drawing Questions
Question: What does the term “tolerance” mean in the context of technical drawings?
a) The permissible limit of deviation
b) The precision of the drawing tools
c) The drawing’s aesthetic details
d) The ratio of dimensions
Answer: a) The permissible limit of deviation
Question: In orthographic projection, what is the purpose of an auxiliary view?
a) To show hidden features
b) To provide an isometric representation
c) To reveal true shapes of inclined surfaces
d) To highlight aesthetic details
Answer: c) To reveal true shapes of inclined surfaces
Question: What is the function of a detail view in a technical drawing?
a) To showcase the overall structure
b) To emphasize aesthetic features
c) To provide a close-up of a specific area
d) To guide the viewer’s eye
Answer: c) To provide a close-up of a specific area
Question: Which line type is used to represent the center of a cylindrical feature in a technical drawing?
a) Object line
b) Center line
c) Hidden line
d) Construction line
Answer: b) Center line
Question: What is the purpose of hatching or cross-hatching in a section view?
a) To indicate hidden features
b) To provide aesthetic details
c) To show the direction of projection
d) To represent the material cut by the section
Answer: d) To represent the material cut by the section
Section B: Theory Questions (Continued)
Question: Discuss the importance of consistency in dimensioning within a technical drawing.
Answer: Consistency in dimensioning ensures uniformity and accuracy throughout the drawing, facilitating clear communication of size specifications and avoiding confusion.
Question: Explain the concept of symmetry in technical drawings and its significance.
Answer: Symmetry in technical drawings implies balanced proportions. It is crucial for aesthetics, manufacturing ease, and ensuring that components fit together seamlessly.
Question: Describe the purpose of a bill of materials (BOM) in the context of technical drawings.
Answer: A bill of materials lists all the components, materials, and quantities required for a project. It serves as a reference for manufacturing and assembly.
Question: What role does CAD (Computer-Aided Design) play in modern technical drawing practices?
Answer: CAD enhances efficiency and precision by allowing designers to create, edit, and store technical drawings digitally. It facilitates easier collaboration and reduces manual drafting errors.
Question: Discuss the significance of geometric dimensioning and tolerancing (GD&T) in technical drawings.
Answer: GD&T is a symbolic language used to communicate precise engineering tolerances. It ensures consistent interpretation of design specifications, promoting accuracy and interchangeability in manufacturing processes.
