NECO Technical Drawing Past Questions And Answers (Objective and Theory)
Section A: Technical Drawing Questions
Question: What is the purpose of a construction line in technical drawing?
a) To represent the final outline
b) To provide a framework for sketching
c) To indicate hidden features
d) To showcase aesthetic details
Answer: b) To provide a framework for sketching
Question: Which type of projection shows the object as it appears to the human eye, with depth, width, and height?
a) Isometric projection
b) Orthographic projection
c) Perspective projection
d) Auxiliary projection
Answer: c) Perspective projection
Question: In technical drawing, what does the term “scale” refer to?
a) The measurement units used
b) The proportion between dimensions
c) The color representation
d) The drawing style
Answer: b) The proportion between dimensions
Question: Which line type is used to represent the edges or contours that are not directly visible in an object?
a) Object line
b) Hidden line
c) Center line
d) Dimension line
Answer: b) Hidden line
Question: What is the purpose of dimension lines in technical drawings?
a) To outline the shape of the object
b) To indicate hidden features
c) To show the overall size and location of features
d) To highlight aesthetic details
Answer: c) To show the overall size and location of features
Question: In orthographic projection, how many principal views are typically used to represent an object?
a) One
b) Two
c) Three
d) Four
Answer: c) Three
Question: Which symbol is used to represent a fillet in a technical drawing?
a) V
b) U
c) R
d) F
Answer: c) R
Question: What does the term “sectional view” mean in technical drawing?
a) A view from the top
b) A view from the bottom
c) A cutaway view to reveal internal details
d) A magnified view of specific features
Answer: c) A cutaway view to reveal internal details
Question: Which type of projection is commonly used for depicting machine parts and architectural drawings?
a) Isometric projection
b) Oblique projection
c) Orthographic projection
d) Auxiliary projection
Answer: c) Orthographic projection
Question: What is the purpose of a leader line in a technical drawing?
a) To guide the viewer’s eye
b) To indicate a hidden feature
c) To provide measurements
d) To highlight aesthetic details
Answer: c) To provide measurements
Question: Which line type represents the outlines of the object in a technical drawing?
a) Object line
b) Construction line
c) Center line
d) Hidden line
Answer: a) Object line
Question: What does the term “isometric” refer to in isometric projection?
a) Equal measurements
b) Equal angles
c) Equal distances
d) Equal scales
Answer: b) Equal angles
Question: Which type of projection is suitable for displaying true shapes and sizes of an object’s features?
a) Isometric projection
b) Orthographic projection
c) Perspective projection
d) Axonometric projection
Answer: b) Orthographic projection
Question: What is the purpose of a center line in technical drawings?
a) To represent the final outline
b) To indicate hidden features
c) To guide the viewer’s eye
d) To provide measurements
Answer: c) To guide the viewer’s eye
Question: Which type of projection is often used for creating detailed engineering drawings?
a) Oblique projection
b) Perspective projection
c) Orthographic projection
d) Isometric projection
Answer: c) Orthographic projection
Section B: Theory Questions
Question: Explain the purpose of multiview projection in technical drawing.
Answer: Multiview projection is used to represent a three-dimensional object in two dimensions by providing different views (front, top, and side) to convey accurate shape and size information.
Question: Describe the significance of symbols and annotations in a technical drawing.
Answer: Symbols and annotations provide additional information, clarify features, and convey specifications such as dimensions, materials, and finishes in a technical drawing.
Question: What is the role of auxiliary views in technical drawings, and when are they typically used?
Answer: Auxiliary views are used to show the true shape and size of inclined or oblique features that are not clearly represented in the principal views of an object.
Question: Explain the concept of scale in technical drawing and its importance.
Answer: Scale in technical drawing refers to the ratio between the dimensions on the drawing and the actual dimensions of the object. It is crucial for accurate representation and understanding of size relationships.
Question: Discuss the purpose of isometric projection and provide an example of its application.
Answer: Isometric projection is used to represent a three-dimensional object with equal angles between all three axes. It is often applied in technical drawings for visualizing machine parts or architectural designs in a simplified, realistic manner.
