ORTHOGRAPHIC PROJECTIONS
1 The selection of the front view in executing a multiview drawing of an object is dependent upon the following factors:
A) size and shape of the object and their relationship to all views.
B) the number of principal views required and the related auxiliary views needed to describe the object.
C) the greatest contour shape, the related dashed lines, and the position of use.
D) the size of the object, size of the paper, position of use, and least number of hidden lines.
Ans: (d)
2 All of the following statements about multiview drawings are true, except:
A) each view is a 3-D pictorial image
B) based on orthographic projection
C) at least two views of the object
D) views are defined by planes of projection
Ans: (a)
3 Which type of projection does not have the projection rays parallel to each other?
A) axonometric projection
B) oblique projection
C) orthographic projection
D) perspective projection
Ans: (d)
4 Which is not a principal view?
A) bottom
B) left side
C) auxiliary
D) front
Ans: (c)
5 Principle planes will appear as:
A) normal planes or edges
B) oblique planes or edges
C) normal planes or oblique planes
D) skewed planes or edges
Ans: (a)
6 In orthographic projection, visual rays or lines of sight for a given view are _____________ to each other.
A) perpendicular B) oblique
C) normal D) parallel
Ans: (d)
7 What two types of projections give a pictorial view of the object without convergence?
A) orthographic and perspective
B) oblique and axonometric
C) perspective and oblique
D) isometric and orthographic
Ans: (b)
8 Inclined planes in a three-view drawing will appear as:
A) two surfaces and one edge
B) two edges and one surface
C) three edges
D) foreshortened in each view
Ans: (a)
9 Oblique planes in a three-view drawing will appear as:
A) two surfaces and one edge
B) two edges and one surface
C) three edges
D) three surfaces
Ans: (d)
10 Normal planes in a three-view drawing will appear as:
A) one surface and two edges
B) three surfaces
C) one edge and two surfaces
D) three edges
Ans: (a)
11 A viewing direction which is perpendicular to the surface in question gives a(n) ____________ view.
A) inclined
B) normal
C) oblique
D) perspective
Ans: (b)
12 A viewing direction which is parallel to the surface in question gives a(n) ____________ view.
A) inclined
B) normal
C) edge
D) perspective
Ans: (c)
13 When a surface of an object is inclined to a plane of projection, it will appear _________________ in the view.
A) foreshortened
B) in true size and shape
C) as a line
D) as a point
Ans: (a)
14 What are the three principle planes in orthographic projection?
A) front, top, profile
B) back, top, profile
C) top, front, right side
D) frontal, horizontal, profile
Ans: (d)
15 The top view of an object should typically be drawn:
A) to the right of the front view.
B) anywhere on the same page.
C) directly above the front view.
D) on a separate piece of paper.
Ans: (c)
16 A horizontal surface of a multiview drawing will appear as a(n) ___________ in the front view.
A) edge
B) normal surface
C) point
D) foreshortened surface
Ans: (a)
17 Which view is usually developed first, contains the least amount of hidden lines, and shows the most contours in multiview drawings?
A) right side B) top
C) back D) front
Ans: (d)
18 A sphere can be described in how many views?
A) 4 B) 3
C) 2 D) 1
Ans: (d)
19 An asymmetric object is usually described by how many views?
A) 6 B) 3
C) 4 D) 2
Ans: (b)
20 An axially symmetric object, such as one turned on a lathe, normally can be shown in _________ view(s).
A) one B) two
C) three D) four
Ans: (b)
21 In orthographic projection, visual rays are __________ to the projection plane.
A) parallel B) adjacent
C) perpendicular D) tangent
Ans: (c)
22 The top and right side views have what common dimension(s)?
A) height and width
B) width and depth
C) height
D) depth
Ans: (d)
23 For orthographic projection, the engineering custom in the United States dictates the use of:
A) first-angle projection
B) second-angle projection
C) third-angle projection
D) fourth-angle projection
Ans: (c)
24 For orthographic projection, the engineering custom in Europe dictates the use of:
A) first-angle projection
B) second-angle projection
C) third-angle projection
D) fourth-angle projection
Ans: (a)
25 The sequence for the direction of view (or line of sight) for any orthographic projection as utilized in the United States is:
A) eye of observer>projection plane>object
B) eye of observer>object>projection plane
C) projection plane>object>eye of observer
D) projection plane>eye of observer>object
Ans: (a)
26 Depending on its relationship to the projection plane on which the view is projected, a line may project:
A) true length
B) foreshortened
C) as a point
D) all of the above
Ans: (d)
27 If a surface on an object is parallel to one of the principal planes of projection, then the angular relationship of that surface to at least two other principal projection planes is:
A) parallel
B) perpendicular
C) inclined
D) unknown
Ans: (b)
28 Good practice dictates that the characteristic contour shape of the object be shown in what view?
A) top
B) front
C) right side
D) any side
Ans: (b)
29 The height, width, and depth of an object can be shown with a minimum of how many orthographic projection views?
A) six
B) three
C) two
D) four
Ans: (c)
30 Which of the following pairs of orthographic views both show the height dimension?
A) left side and front
B) top and front
C) top and rear
D) bottom and right side
Ans: (a)
31. Hidden lines are drawn as
(a) dashed narrow lines
(b) dashed wide lines
(c) long-dashed dotted wide line
(d) long-dashed double dotted wide line
Ans: (a)
32. 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)
33. 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)
34. The line connecting a view to note is called
(a) dimension line
(b) projection line
(c) leader
(d) arrowheads
Ans: (c)
35. The dimension figure for radius of a circle should be preceded by
(a) R
(b) CR
(c) SR
(d) RAD
Ans: (b)
36. The recommended method of dimensioning a sphere with diameter 80 mm is
(a) 80fS
(b)f80S
(c) S80f
(d) Sf80
Ans: (d)
37. Methods of arrangement of dimensions includes
(a) Parallel, continuous and combined
(b) Perpendicular, parallel and combined
(c) Perpendicular, continuous and combined
(d) Perpendicular, parallel and continuous
Ans: (a)
38. Superimposed dimensioning is a simplified method of
(a) chain dimensioning
(b) parallel dimensioning
(c) combined dimensioning
(d) tabular dimensioning
Ans: (b)
39. A curve drawn for Boyle’s law (PV = constant) on a P-V chart has a characteristic shape of
(a) ellipse
(b) parabloa
(c) oblique hyperbola
(d) rectangular hyperbola
Ans: (d)
40. The profile of a gear teeth is in the form of
(a) parabola
(b) involute
(c) spiral
(d) helix
Ans: (b)
41. When two angles together make 90º, they are called
(a) obtuse angle
(b) reflex angle
(c) complementary angles
(d) supplementary angles
Ans: (c)
42. The included angle of a hexagon is
(a) 300
(b) 600
(c) 1200
(d) 1500
Ans: (c)
43. 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)
44. 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)
45. 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)
46. 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)
47. 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)
48. 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)
49. Comparative scale is a pair of scale having a common
(a) units
(b) representative fraction
(c) length of scale
(d) least count
Ans: (b)
50. 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)
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