This document contains 55 multiple choice questions and answers related to engineering drawing and technical drawing concepts. Some key topics covered include: common units of measurement in technical drawings, different types of lines and their meanings (visible, hidden, center), orthographic projections and how 3D objects are represented in 2D views, principles of first angle and third angle projection, different types of sections (full, half, quarter), geometric shapes and properties (spheres, cylinders, cones), and basic concepts of dimensioning. The questions are designed to test fundamental understanding of core technical drawing principles and terminology.

1. Engineering Drawing OBJECTIVE BITS with Answers --- M V Reddy
1. The primary unit of measurement for engineering drawings and design in the mechanical
industries is the
(a) millimeter (b) centimeter (c) meter (d) kilometer
Ans: (a)
2. Line composed of closely and evenly spaced short dashes in a drawing represents
(a) visible edges (b) hidden edges (c) hatching (d) pitch circle of gears
Ans: (b)
3. Lettering on a drawing sheet should have
(a) all alphabets in capital letters
(b) all alphabets in small letters
(c) In a sentance only first alphabet in capital letter
(d) In a sentance only abbreviations are capital letter
Ans: (a)
4. The line connecting a view to note is called
(a) dimension line (b) projection line (c) leader (d) arrowheads
Ans: (c)
5. The dimension figure for radius of a circle should be preceded by
(a) R (b) CR (c) SR (d) RAD
Ans: (b)
6. The recommended method of dimensioning a sphere with diameter 80 mm is
(a) 80фS (b) ф80S (c) S80ф (d) Sф80
Ans: (d)
7. A square lamina in isometric projection appears as
(a) Rhombus (b) Rectangle (c) Trapezium (d) Parallelogram
Ans: (a)
8. In isometric projection the three edges of an object are inclined to each other at
(a) 60 (b) 120 (c) 100 (d 90
Ans: (b)
9. A curve drawn for Boyle’s law (PV = constant) on a P-V chart has a characteristic shape of
(a) ellipse (b) parabola (c) oblique hyperbola (d) rectangular hyperbola
Ans: (d)
10. The profile of a gear teeth is in the form of
(a) parabola (b) involute (c) spiral (d) helix
Ans: (b)
11. When two angles together make 90º, they are called
(a) obtuse angle (b) reflex angle (c) complementary angles (d) supplementary angles
Ans: (c)
12. The included angle of a hexagon is
(a) 30º (b) 60º (c) 120º (d) 150º
Ans: (c)
13. The curve generated by a point on the circumference of a circle, which rolls without slipping
along outside of another circle is known as
(a) Hypocycloid (b) Epicycloid (c) Cycloid (d) Trochoid
Ans: (b)

2. 14. In orthographic projections, the rays are assumed to
(a) diverge from station point (b) converge from station point (c) be parallel (d) None of these
Ans: (c)
15. If an object lies in third quadrant, its position with respect to reference planes will be
(a) infront of V.P, above H.P (b) behind V.P., above H.P. (c) behind V.P., below H.P.
(d) infront of V.P., below H.P.
Ans: (c)
16. If the Vertical Trace (V.T.) of a line lies 30 mm above reference line (XY), then its position
will be
(a) 30 mm infront of V.P. (b) 30 mm behind V.P. (c) 30 mm above H.P. (d) 30 mm below H.P.
Ans: (c)
17. When an object is cut by a section plane parallel to H.P and perpendicular to V.P, then the
sectional view of the object is obtained in
(a) top view (b) front view (c) left side view (d) right side view
Ans: (a)
18. Which of the following object gives a circular section, when it is cut completely by a section
plane (irrespective of the angle of the section plane)
(a) Cylinder (b) Sphere (c) Cone (d) Circular lamina
Ans: (b)
19. Comparative scale is a pair of scale having a common
(a) units (b) representative fraction (c) length of scale (d) least count
Ans: (b)
20. An angle can be set off and measured with the help of
(a) plane scale (b) diagonal scale (c) comparative scale (d) Scale of chords
Ans: (d)
21. What type of line has precedence over all other types of lines?
(a) hidden line (b) centre line (c) visible line (d) none of the above
Ans: (c)
22. Which is not a principal view?
(a) front (b) bottom (c) auxiliary (d) left side
Ans: (c)
23. The top view of an object should typically be drawn in first angle projection.
(a) to the right of the front view (b) directly below the front view
(c) anywhere on the same page (d) on a separate piece of paper
Ans: (b)
24. The top and right side views have common dimensions of
(a) height and width (b) width and depth (c) height (d) depth
Ans: (a)
25. This is how axonometric, oblique, and perspective sketches show objects
(a) Orthographically (b) Pictorially (c) Obliquely (d) Parallel
Ans: (b)
26. This type of solid has two bases that are parallel equal polygons:
(a) pyramid (b) prism (c) cone (d) torus
Ans: (b)

3. 27. The solid having a polygon for a base and triangular lateral faces intersecting at a vertex is
(a) pyramid (b) prism (c) cone (d) torus
Ans: (a)
28. These types of projectors converge at a vanishing point
(a) perspective (b) parallel (c) orthographic (d) oblique
Ans: (a)
29. In oblique sketches, the most commonly used angles for receding lines are
(a) 15 or 60 degrees (b) 15 or 75 degrees (c) 45 or 60 degrees (d) 45 or 75 degrees
Ans: (c)
30. Objects that are symmetric can be shown effectively using this type of section
(a) quarter section (b) half section (c) full section (d) symmetric section
Ans: (b)
31. In this type of section, one quarter of the object is removed
(a) revolved section (b) removed section (c) quarter section (d) half section
Ans: (d)
32. This type of section is limited by a break line
(a) removed section (b) revolved section (c) broken-out section (d) half section
Ans: (c)
33. Head lamps of motor vehicles are in the shape of a
(a) Ellipse (b) Parabola (c) Hyperbola (d) Square
Ans: (c)
34. Eccentricity of parabola is ..................... one
(a) less than (b) more than (c) equal to (d) none
Ans: (c)
35. The angle between the flanks of a metric thread is
(a) 60 (b) 90 (c) 75 (d) 55
Ans: (a)
36. The number of cotters used in an assembly of sleeve and cotter joint are
(a) One (b) Five (c) Four (d) Two
Ans: (d)
37. What is the correct FRONT view in the figure below?
Ans: (D)

4. 38. What is the correct FRONT view in the figure below?
Ans: (A)
39. If a cylinder is cut as illustrated below, the RIGHT SIDE view will contain a/an:
(A) Circle. (B) Ellipse. (C) Rectangle. (D) Triangle
Ans: (B)
40. What is the correct FRONT view in the figure below?
Ans: (C)

5. 41. Which is the correct RIGHT SIDE view of the figure below?
Ans: (C)
42. In orthographic projection, lines are formed by projecting edges of the object onto planes.
The images formed on the planes are called:
A) Views. B) Sides. C) Points. D) Tangencies
Ans: (A)
43. The term ORTHOGRAPHIC PROJECTION means to:
A) “Throw backward at an angle of 45° and draw.”
B) “Throw forward at an angle of 45° and draw.”
C) “Throw forward at right angles and draw.”
D) “Rotate the object at 45° to the picture plane.”
Ans: (C)
44. What type of line must be drawn between points A & B to complete the LEFT SIDE view of
the figure below?
A) Center B) Hidden C) Section D) Visible
Ans: (A)
45. Which is the correct FRONT view of the figure below?
Ans: (B)

6. 46. Which is the correct TOP view of the figure below?
Ans: (A)
47. ORTHOGRAPHIC PROJECTION is a system that allows you to make:
A) Three-dimensional drawings of a two dimensional object.
B) Two-dimensional drawings of a two dimensional object.
C) Two-dimensional drawings of a three dimensional object.
D) Three-dimensional drawings of a three dimensional object.
Ans: (A)
48. The PRECEDENCE OF LINES tells us that if a visible line and a hidden line coincide
(occupy the same position on the drawing), we should:
A) Draw only the hidden line. B) Draw only the visible line.
C) Draw the hidden line just above the visible line. D) Replace them with a phantom line.
Ans: (B)
49. The PRECEDENCE OF LINES tells us that if a visible line and a center line coincide
(occupy the same position on the drawing), we should:
A) Draw only the center line. B) Draw only the visible line.
C) Draw the center line just above the visible line. D) Replace them with a phantom line.
Ans: (B)
50. Which is a CENTER LINE?
Ans: (B)
51. The face of the object that has the most descriptive feature(s) should be the:
A) Back View. B) Front View. C) Right side View. D) Top View.
Ans: (B)
52. When making an orthographic drawing, the THICKEST lines should be the:
A) Center lines. B) Visible (object) lines. C) Extension lines. D) Hidden lines.
Ans: (B)
53. Surfaces or edges that CANNOT be seen in the views are drawn with:
A) Centerlines. B) Visible/Object lines. C) Hidden lines. D) No lines.
Ans: (C)
54. In an orthographic drawing, a circular surface may NOT appear as a/an:
A) Ellipse. B) Circle. C) Straight line. D) Parabola.
Ans: (D)
55.A line at an angle of less than 90° to a plane of projection will appear as a:
A) Point. B) True length line. C) Curved line. D) Foreshortened line.
Ans: (D)