Q.1 Which type of projection preserves the relative proportions of an object along parallel lines?
Perspective Projection
Orthographic Projection
Oblique Projection
Stereographic Projection
Explanation - Orthographic projection maps 3D objects onto a 2D plane using parallel projection lines, preserving relative proportions without perspective distortion.
Correct answer is: Orthographic Projection
Q.2 In which projection do all projection lines converge at a single point?
Orthographic Projection
Perspective Projection
Oblique Projection
Isometric Projection
Explanation - In perspective projection, projection lines converge at the center of projection, simulating human eye perception of depth.
Correct answer is: Perspective Projection
Q.3 Which type of axonometric projection shows all three axes at equal angles of 120 degrees?
Isometric
Dimetric
Trimetric
Oblique
Explanation - In isometric projection, the angles between all three axes are equal at 120°, providing uniform scaling along each axis.
Correct answer is: Isometric
Q.4 In a dimetric projection, how many axes have equal foreshortening?
One
Two
Three
None
Explanation - Dimetric projection has two axes with the same scale and the third with a different scale, giving unequal foreshortening.
Correct answer is: Two
Q.5 Which type of projection is commonly used in engineering drawing for technical illustration?
Oblique Projection
Perspective Projection
Orthographic Projection
Stereographic Projection
Explanation - Orthographic projection is widely used in engineering because it represents objects without distortion, allowing precise measurements.
Correct answer is: Orthographic Projection
Q.6 Which projection technique displays the front face of the object true to scale and other faces at an angle?
Isometric
Oblique
Perspective
Orthographic
Explanation - Oblique projection shows the front face in true scale while other faces are projected at an angle, often using cavalier or cabinet types.
Correct answer is: Oblique
Q.7 In cavalier oblique projection, what is the receding axis scale?
Full scale
Half scale
Quarter scale
No scale
Explanation - Cavalier oblique projection uses full-scale measurement along the receding axis, which may cause distortion but keeps proportions.
Correct answer is: Full scale
Q.8 Which type of oblique projection reduces distortion by halving the receding axis?
Cavalier
Cabinet
Isometric
Dimetric
Explanation - Cabinet projection halves the receding axis to reduce distortion and make the image more visually realistic.
Correct answer is: Cabinet
Q.9 Which projection technique gives a realistic sense of depth but does not preserve scale?
Orthographic
Perspective
Isometric
Dimetric
Explanation - Perspective projection converges lines to a vanishing point, providing depth perception but not true scale.
Correct answer is: Perspective
Q.10 Which projection method is preferred for visualizing 3D objects in video games and simulations?
Orthographic
Perspective
Dimetric
Oblique
Explanation - Perspective projection is widely used in graphics, games, and simulations for a realistic 3D view.
Correct answer is: Perspective
Q.11 In a trimetric projection, how many axes have unequal foreshortening?
One
Two
Three
None
Explanation - Trimetric projection has all three axes foreshortened unequally, allowing flexibility in visual representation.
Correct answer is: Three
Q.12 Which projection uses parallel projection lines but the object appears rotated so that multiple faces are visible?
Isometric
Oblique
Orthographic
Perspective
Explanation - Isometric projection shows multiple faces using parallel lines and rotation of the object, preserving scale along axes.
Correct answer is: Isometric
Q.13 Which perspective projection has a single vanishing point?
One-point
Two-point
Three-point
Four-point
Explanation - One-point perspective uses a single vanishing point to depict depth, typically for objects facing the viewer directly.
Correct answer is: One-point
Q.14 Which perspective projection uses two vanishing points to represent depth along two axes?
One-point
Two-point
Three-point
Orthographic
Explanation - Two-point perspective projects objects with depth along two axes, commonly used in architectural visualization.
Correct answer is: Two-point
Q.15 Which perspective projection involves three vanishing points including the vertical axis?
One-point
Two-point
Three-point
Isometric
Explanation - Three-point perspective adds a vanishing point along the vertical axis, creating a more realistic 3D effect.
Correct answer is: Three-point
Q.16 Which property is NOT preserved in perspective projection?
Shape
Parallelism
Depth cues
Convergence to vanishing points
Explanation - In perspective projection, parallel lines converge at vanishing points, so parallelism is not preserved.
Correct answer is: Parallelism
Q.17 In orthographic projection, how many views are typically used to represent a 3D object fully?
1
2
3
6
Explanation - Front, top, and side views (3 views) in orthographic projection are commonly used to fully describe a 3D object.
Correct answer is: 3
Q.18 Which projection is sometimes called 'planometric' in technical drawing?
Isometric
Dimetric
Oblique
Perspective
Explanation - Oblique projections are sometimes called planometric because the front plane is parallel to the projection plane.
Correct answer is: Oblique
Q.19 Which axonometric projection requires the object to be rotated so that angles between axes are not equal?
Isometric
Dimetric
Trimetric
Oblique
Explanation - Trimetric projection allows all three axes to have unequal angles, providing flexibility in visualization.
Correct answer is: Trimetric
Q.20 In computer graphics, which projection method is used for texture mapping to avoid distortion?
Perspective
Orthographic
Oblique
Cavalier
Explanation - Orthographic projection preserves scale along axes, making it suitable for texture mapping without distortion.
Correct answer is: Orthographic
Q.21 Which projection is often used for CAD modeling to represent mechanical parts accurately?
Perspective
Orthographic
Oblique
Trimetric
Explanation - CAD modeling relies on orthographic projection for precise dimensions and measurements in technical drawings.
Correct answer is: Orthographic
Q.22 Which projection method is easiest for a human to interpret visually with a sense of depth?
Orthographic
Perspective
Isometric
Dimetric
Explanation - Perspective projection mimics human visual perception, providing a natural sense of depth.
Correct answer is: Perspective
Q.23 Which type of projection shows foreshortening equally along all three axes?
Isometric
Dimetric
Trimetric
Oblique
Explanation - Isometric projection maintains equal foreshortening along all three axes, giving a uniform visual representation.
Correct answer is: Isometric
Q.24 Which projection is preferred for pictorial views where one face is displayed in true shape and size?
Orthographic
Oblique
Perspective
Isometric
Explanation - Oblique projection allows one face to be shown in true size while the other faces are projected at an angle.
Correct answer is: Oblique