Quick recall · 173 cards
Short MCQ-style retrieval prompts. Tap a card to reveal the answer.
PYQ · 2021
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According to first angle method of projection, the left side view should be at?
B · Right side of front view
PYQ · 2021
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In first angle method of projection the top view should be?
D · Below the front view
PYQ
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Which of the following is NOT a typical view in orthographic projection?
C · Isometric view
PYQ · 2015
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A square lamina in isometric projection appears as?
A · Rhombus
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If isometric projection of an object is drawn with true lengths the shape would be same and size is how much larger than actual isometric projection?
C · 22.5%
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If an isometric projection is drawn with true measurements but not with isometric scale then the drawings are called ____________
B · Isometric view
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When an object is viewed from different directions and at different distances, the appearance of the object will be different. Such view is called ___________
B · perspective view
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In the ___________ method, the points on the perspective are obtained by projecting the top view with either the front view or the side view of the visual rays.
C · visual ray
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In perspective projection, the eye is assumed to be situated at a _______ position relative to the object.
B · definite
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In perspective projection the projectors are _________ to each other and ________ to picture plane.
B · not parallel; inclined
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In perspective projection, the horizontal plane in which the object is assumed to be situated is called ______________
C · ground plane
The ground plane (GP) is the horizontal reference plane upon which the object rests in perspective projection setup. It intersects the picture plane along the ground line.[2][3]
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Which of the following are the methods of drawing perspective projections?
1. Projection method or visual ray method
2. Vanishing point method
3. Direct method
D · 1, 2 and 3
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What is the primary purpose of an auxiliary view in engineering drawings?
B · To create a true projection plane from an inclined plane
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The principle reason for using an auxiliary view is ________.
B · to create a true projection plane from an inclined plane
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Any view obtained by a projection on a plane other than the horizontal, frontal, and profile projection planes is called ________.
B · auxiliary view
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Auxiliary planes are of _______ types.
A · 2
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In ____________ the direction of viewing is such that two of the three axes of space appear equally foreshortened.
C · dimetric projection
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The front and top view are sometimes not sufficient to convey all the information regarding the object. Which plane is used in such cases?
A · Auxiliary Vertical Plane
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Which of the following statements is wrong in case of oblique projection?
A · a) The object is drawn with the reduced dimensions
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In oblique projection, the faces of the object which are perpendicular to the plane of projection will be ___________
C · c) Drawn in their true shape and size
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When the receding lines are drawn to full size scale then the oblique projection is ___________
A · a) Cavalier
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In oblique projection, important shapes should be in this position relative to the viewing plane.
A · A. Parallel
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Oblique projection is a type of _________ drawing.
B · B. Parallel
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In oblique projection, the front face is drawn in _________ size.
B · B. Full
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Which of the following best defines isometric projection?
A · A method of representing three-dimensional objects in two dimensions where all three axes are equally foreshortened
Isometric projection is a form of axonometric projection where the three principal axes are equally foreshortened and the angle between any two axes is 120°.
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In isometric projection, the angle between any two isometric axes is:
B · 120°
In isometric projection, the three axes are equally inclined to each other, each forming an angle of 120°.
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Which statement is TRUE about isometric projection?
B · It shows three faces of an object equally foreshortened
Isometric projection equally foreshortens all three principal axes, showing three faces of the object equally.
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Which of the following is NOT a fundamental characteristic of isometric projection?
C · Use of vanishing points for depth representation
Isometric projection does not use vanishing points; it is a parallel projection method.
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Refer to the diagram below showing isometric axes. What is the correct label for the axis pointing vertically upwards?
C · Isometric Z-axis
In isometric projection, the vertical axis is conventionally labeled as the Z-axis.
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The isometric scale is used because:
B · True lengths cannot be directly measured along isometric axes
The isometric scale compensates for the foreshortening of lengths along the isometric axes, allowing true lengths to be measured.
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Refer to the diagram below showing an isometric scale. What is the approximate length on the isometric scale corresponding to a true length of 50 mm?
B · 43.3 mm
Isometric scale length = True length × 0.866 (\( \cos 30^\circ \)) \( 50 \times 0.866 = 43.3 \) mm approximately.
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Which of the following statements about isometric axes is correct?
B · Isometric axes are drawn at 120° to each other
Isometric axes are equally inclined at 120° to each other in isometric projection.
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In isometric projection, the length of a line measured along an isometric axis is multiplied by which factor to obtain the true length?
A · 1.154
The isometric scale factor is approximately 1.154 (\( \frac{1}{\cos 30^\circ} \)) to convert isometric length to true length.
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What is the first step in the procedure for drawing an isometric projection of a simple object?
A · Draw the isometric axes at 120° to each other
The first step is to draw the isometric axes, which serve as the reference for plotting the object.
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During isometric drawing, which of the following is used to represent the true length of edges?
B · Isometric scale
Isometric scale is used to measure lengths along isometric axes to represent true lengths accurately.
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Which of the following steps is performed after drawing the isometric axes in the isometric drawing procedure?
A · Mark the isometric scale lengths along the axes
After drawing the axes, lengths are marked along these axes using the isometric scale to plot the object.
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Refer to the diagram below showing an isometric drawing in progress. Which dimension should be marked first using the isometric scale?
A · Length along X-axis
Typically, the length along the X-axis is marked first to establish the base of the object.
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Which of the following solids is easiest to represent in isometric view?
C · Cube
A cube has straight edges aligned with the principal axes, making it simpler to draw in isometric projection.
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Which geometric solid's isometric view typically shows an ellipse instead of a circle?
B · Cylinder
In isometric projection, circular faces of cylinders appear as ellipses due to the angle of projection.
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In isometric view, the edges of a cube are drawn along which directions?
B · Along three axes inclined at 120° to each other
Edges of a cube in isometric projection are drawn along three axes equally inclined at 120° to each other.
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Refer to the diagram below showing isometric views of a cube and a cylinder. Which shape's isometric view shows curved edges?
B · Cylinder
The cylinder's isometric view shows curved elliptical edges, unlike the cube which has straight edges.
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Which of the following is the correct method to convert an orthographic front view of a cube into its isometric projection?
B · Project the front view onto isometric axes inclined at 120°
Conversion involves projecting the orthographic views onto isometric axes which are inclined at 120° to each other.
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Refer to the diagram below showing an orthographic front view and its isometric projection. Which feature is distorted in the isometric view compared to the orthographic view?
C · Length along the isometric axes
Lengths along isometric axes are foreshortened and must be measured using the isometric scale.
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Which of the following is a correct advantage of isometric projection over orthographic projection?
A · Shows all three dimensions in a single view
Isometric projection shows three dimensions in one view, unlike orthographic which shows separate views.
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Which of the following is NOT an application of isometric projection?
C · Photorealistic rendering
Photorealistic rendering requires perspective projection, not isometric projection.
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One of the main advantages of isometric projection is that it:
C · Allows visualization of an object’s depth, width, and height in one view
Isometric projection allows all three dimensions to be seen in one view, aiding visualization.
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Which of the following is a common error in isometric drawing?
C · Incorrectly foreshortening the vertical axis
The vertical axis should be drawn to true scale and not foreshortened; foreshortening it is a common error.
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Which convention is followed when drawing hidden edges in isometric projection?
B · Drawn as dashed lines
Hidden edges are conventionally drawn as dashed lines in isometric drawings.
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Refer to the diagram below showing an isometric drawing with incorrectly drawn edges. Which edge violates the isometric drawing convention?
A · Edge drawn with incorrect angle to isometric axes
Edges must be drawn parallel to one of the three isometric axes; any edge drawn at an incorrect angle is an error.
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Which of the following is a correct practice when dimensioning an isometric drawing?
A · Dimensions are shown along isometric axes using isometric scale
Dimensions in isometric drawings are shown along isometric axes using the isometric scale for accuracy.
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Which of the following is NOT a common error in isometric drawing?
B · Using isometric scale for length measurement
Using the isometric scale is a correct practice, not an error.
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A hexagonal plate of side 44 mm is placed such that one of its edges lies along the isometric Z-axis. Calculate the length of the isometric projection of the distance between two opposite vertices of the hexagon.
D · 86.7 mm
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An object has an edge measuring 120 mm inclined at 45° to the isometric X-axis and 30° to the isometric Y-axis. Calculate the length of its isometric projection.
A · 89.7 mm
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An object has an edge of length 100 mm oriented such that it makes equal angles with all three isometric axes. Calculate the length of the isometric projection of this edge.
C · 57.7 mm
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A rectangular block 75 mm × 45 mm × 30 mm is rotated 30° about the isometric Z-axis. Calculate the length of the isometric projection of the edge originally along the X-axis after rotation.
B · 63.4 mm
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Assertion (A): The isometric projection of a circle always appears as an ellipse. Reason (R): The foreshortening along the axes causes the circle to distort into an ellipse in isometric projection.
A · Both A and R are true, and R is the correct explanation of A
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Which statement is true about the fundamentals of perspective projection?
C · Vanishing points are used to represent depth
Vanishing points are fundamental in perspective projection to represent how parallel lines appear to converge at a point in the distance.
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In perspective projection, the point where parallel lines appear to meet is called the:
B · Vanishing point
The vanishing point is where parallel lines appear to converge in perspective drawings.
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Which of the following is NOT a characteristic of perspective projection?
C · Objects retain their true size and shape
In perspective projection, objects do not retain their true size and shape; they appear smaller with distance.
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Which type of perspective projection uses a single vanishing point?
A · One-point perspective
One-point perspective uses a single vanishing point typically on the horizon line.
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Refer to the diagram below showing a cube in perspective projection with two vanishing points on the horizon line. What type of perspective projection is illustrated?
B · Two-point perspective
Two-point perspective uses two vanishing points on the horizon line to represent objects rotated relative to the viewer.
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Which perspective projection type involves three vanishing points, including one above or below the horizon line?
C · Three-point perspective
Three-point perspective uses three vanishing points: two on the horizon line and one either above or below it to show height.
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Which of the following is the correct order of steps in constructing a one-point perspective drawing?
B · Draw horizon line, locate vanishing point, draw object front face, project lines to vanishing point
The correct sequence is to first draw the horizon line, locate the vanishing point on it, draw the front face of the object, then project lines to the vanishing point.
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Refer to the diagram below showing stepwise construction of a cube in one-point perspective. What is the purpose of the lines drawn from the corners of the front face to the vanishing point?
B · To establish the depth and foreshortening of the cube
Lines from the front face corners to the vanishing point define the depth and foreshortening effect in perspective projection.
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Which tool is essential for accurately locating vanishing points in perspective drawing?
C · Ruler or straightedge
A ruler or straightedge is used to draw straight projection lines to the vanishing points.
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In perspective projection, the horizon line represents:
A · The eye level of the observer
The horizon line corresponds to the observer's eye level and is where vanishing points lie.
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Refer to the diagram below showing a cube with two vanishing points on the horizon line. Which line in the drawing represents the horizon line?
A · The horizontal line passing through both vanishing points
The horizon line is the horizontal line on which vanishing points lie, representing eye level.
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Which of the following statements about vanishing points is correct?
C · Vanishing points represent directions in which parallel lines appear to converge
Vanishing points represent the directions where parallel lines appear to converge in perspective drawings, not actual points in 3D space.
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In perspective projection, foreshortening refers to:
B · The reduction in size of objects as they move away from the observer
Foreshortening is the visual effect where objects appear smaller as their distance from the observer increases.
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Refer to the diagram below showing a cube in one-point perspective with marked dimensions. If the front face is 50 mm wide, what is the approximate length of the cube's depth as foreshortened in the drawing?
B · Less than 50 mm
Due to foreshortening, the depth dimension appears shorter than the actual 50 mm in the perspective drawing.
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Which factor affects the scale of objects in a perspective drawing?
A · Distance from the observer
In perspective projection, the scale of objects changes with their distance from the observer, appearing smaller as distance increases.
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Which of the following is a common application of perspective projection in engineering drawing?
B · Visualizing how a product will appear in real life
Perspective projection is mainly used to visualize objects realistically as they appear to the eye, aiding in design presentations.
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Refer to the perspective drawing below of a building. Which feature helps to interpret the depth and spatial relationship of the building components?
A · Vanishing points and foreshortening
Vanishing points and foreshortening provide cues about depth and spatial relationships in perspective drawings.
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Which of the following is a key difference between perspective and orthographic projections?
C · Perspective projection shows depth and foreshortening; orthographic projection does not
Perspective projection shows depth and foreshortening, while orthographic projection shows true dimensions without foreshortening.
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Which statement correctly describes orthographic projection compared to perspective projection?
B · Orthographic projection shows objects without perspective distortion
Orthographic projection shows objects without perspective distortion, preserving true size and shape.
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Refer to the table below comparing perspective and orthographic projections. Which feature is unique to perspective projection?
C · Vanishing points and foreshortening
Vanishing points and foreshortening are unique features of perspective projection.
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Which of the following is a common error when constructing perspective drawings?
A · Incorrect placement of vanishing points
Incorrect placement of vanishing points leads to distorted perspective drawings.
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Refer to the diagram below showing a perspective drawing with incorrectly placed vanishing points. What is the likely consequence of this error?
A · The object will appear distorted or skewed
Incorrect vanishing points cause distortion or skewing in the perspective drawing.
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Which problem-solving approach is best when the scale of objects appears inconsistent in a perspective drawing?
B · Recalculate and reposition the vanishing points
Recalculating and correctly positioning vanishing points helps fix scale inconsistencies in perspective drawings.
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In a three-point perspective drawing, what does the third vanishing point represent?
B · Height direction
The third vanishing point in three-point perspective represents the vertical (height) direction, usually above or below the horizon line.
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When constructing a two-point perspective drawing, what is the effect of placing the vanishing points too close together on the horizon line?
B · The object appears compressed and unnatural
Vanishing points placed too close cause the object to appear unnaturally compressed and distorted.
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Refer to the diagram below showing a cube in three-point perspective. Which line represents the vertical vanishing point direction?
B · The diagonal line converging above the cube
In three-point perspective, vertical edges converge to a vanishing point above or below the object, shown as diagonal lines converging upwards.
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Which construction technique helps in accurately representing foreshortened distances in perspective drawing?
B · Dividing the object into equal parts and projecting them to the vanishing point
Dividing the object into equal parts and projecting these divisions to the vanishing point helps accurately represent foreshortened distances.
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Which of the following errors will cause incorrect foreshortening in a perspective drawing?
A · Incorrectly locating the horizon line
Incorrect horizon line placement affects vanishing points and thus causes incorrect foreshortening.
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Which of the following is NOT a typical cause of distortion in perspective drawings?
C · Using orthographic projection instead
Using orthographic projection is a different method and does not cause distortion in perspective drawings.
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Refer to the diagram below showing stepwise construction of a two-point perspective drawing. Which step is missing if the depth lines do not converge correctly?
B · Locating the two vanishing points
Without correctly locating two vanishing points, the depth lines will not converge properly.
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Which of the following best defines perspective projection in engineering drawing?
B · A technique that represents objects as they appear to the eye with vanishing points
Perspective projection represents objects as they appear to the eye, incorporating vanishing points where parallel lines converge, giving a realistic 3D effect.
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In perspective projection, the point where parallel lines appear to meet is called the?
B · Vanishing point
The vanishing point is where parallel lines appear to converge in perspective projection, simulating depth perception.
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Which characteristic is NOT true about perspective projection?
C · Dimensions are preserved accurately
Perspective projection does not preserve true dimensions; objects appear smaller as they recede, unlike orthographic projection which preserves dimensions.
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Which of the following is a key step in constructing a perspective projection?
A · Locating the vanishing point
Locating the vanishing point is essential in perspective projection to determine where parallel lines converge.
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The main difference between perspective projection and orthographic projection is that perspective projection:
C · Represents objects as seen by the eye with depth
Perspective projection represents objects as seen by the eye, including depth and foreshortening, unlike orthographic projection which uses parallel lines and shows true size.
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Refer to the diagram below showing a cube in one-point perspective projection.
Which line represents the vanishing point direction?
B · Line CD converging towards point V
In one-point perspective, lines converging towards the vanishing point (V) represent depth direction, as shown by line CD.
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Which type of perspective projection uses three vanishing points?
C · Three-point perspective
Three-point perspective uses three vanishing points, typically for representing objects viewed from above or below with depth in all three axes.
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In two-point perspective projection, the object is oriented such that:
B · Two edges recede to two separate vanishing points
In two-point perspective, two edges of the object recede towards two different vanishing points on the horizon line.
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Refer to the diagram below of a cube in two-point perspective.
What is the purpose of points V1 and V2 in the drawing?
B · They are the vanishing points for receding edges
V1 and V2 are the vanishing points where the parallel edges of the cube recede, essential for constructing two-point perspective.
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Which of the following is a correct sequence of steps in constructing a one-point perspective drawing?
A · Draw object outline, locate vanishing point, project lines to VP
First, the object outline is drawn, then the vanishing point is located, and finally, lines are projected from object edges to the vanishing point.
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Refer to the diagram below showing construction lines for perspective projection.
What is the role of the station point (SP) in this construction?
A · It is the position of the observer's eye
The station point represents the observer's eye position from which the perspective view is constructed.
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Which of the following construction steps is essential for creating a three-point perspective drawing?
C · Locating two vanishing points on the horizon and one above or below
Three-point perspective requires two vanishing points on the horizon for horizontal edges and one vanishing point above or below for vertical edges.
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Refer to the diagram below illustrating construction of a cube in three-point perspective.
Which point represents the vertical vanishing point?
C · Point V3 above the cube
In three-point perspective, the vertical vanishing point is located above or below the object, here represented by V3 above the cube.
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Vanishing points in perspective projection are located on which of the following?
B · Horizon line
Vanishing points are located on the horizon line, representing the eye level where parallel lines appear to converge.
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Refer to the diagram below showing a perspective drawing with two vanishing points V1 and V2.
What does the horizon line represent in this drawing?
B · The eye level of the observer
The horizon line represents the observer's eye level and is where vanishing points lie in perspective drawings.
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Which of the following statements about vanishing points is FALSE?
D · Vanishing points are fixed points on the object
Vanishing points are not fixed on the object but are points on the horizon line where parallel lines appear to converge.
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In a perspective drawing, if the observer's eye level is raised, what happens to the position of the horizon line?
C · It moves upward
The horizon line represents the eye level of the observer, so raising the eye level moves the horizon line upward.
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Refer to the diagram below showing a perspective projection and an orthographic projection of the same object.
Which feature distinguishes the perspective projection from the orthographic projection?
B · Objects appear foreshortened in perspective
Perspective projection shows foreshortening and depth, while orthographic projection preserves true dimensions without depth.
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Which of the following is TRUE about orthographic projection compared to perspective projection?
C · It maintains true scale and shape
Orthographic projection maintains true scale and shape without foreshortening, unlike perspective projection.
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Which of the following is NOT an application of perspective projection in engineering drawing?
B · Creating exploded views of mechanical assemblies
Exploded views are typically created using orthographic or isometric projections, not perspective projection.
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Refer to the diagram below showing a perspective projection of a building.
Which aspect of this drawing demonstrates the application of perspective projection?
B · Walls appear to converge towards vanishing points
The walls converging towards vanishing points show the use of perspective projection to represent depth realistically.
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Which of the following best explains why perspective projection is used in engineering presentations?
B · To give a realistic visual impression of the object
Perspective projection provides a realistic visual impression, helping clients and designers visualize the object in 3D.
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Which of the following is a common error when constructing perspective drawings?
A · Incorrect placement of vanishing points
Incorrect placement of vanishing points leads to distorted or unrealistic perspective drawings.
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Refer to the diagram below showing a perspective drawing with misaligned vanishing points.
What is the main error in this drawing?
B · Vanishing points are not on the horizon line
Vanishing points must lie on the horizon line; placing them off causes incorrect perspective and distortion.
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Which troubleshooting step is recommended if the perspective drawing appears distorted?
A · Check if the station point is correctly positioned
Correct positioning of the station point is crucial for accurate perspective; misplacement causes distortion.
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Which of the following errors will cause the vertical edges of a building to converge incorrectly in a perspective drawing?
B · Incorrect location of the vertical vanishing point
Incorrect placement of the vertical vanishing point causes vertical edges to converge improperly, distorting the building's shape.
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Refer to the diagram below showing construction steps for a two-point perspective.
Which line should be drawn first to establish the perspective framework?
A · Line connecting the two vanishing points
Drawing the line connecting the two vanishing points establishes the horizon line and framework for perspective construction.
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What is the primary purpose of auxiliary projection in engineering drawing?
A · To show the true shape and size of inclined surfaces
Auxiliary projection is mainly used to show the true shape and size of surfaces that are inclined to the principal planes, which cannot be accurately represented in standard orthographic views.
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Which of the following best defines auxiliary projection?
A · A method of projecting views onto planes inclined to the principal planes
Auxiliary projection involves projecting views onto auxiliary planes that are inclined to the principal planes to reveal true shapes and sizes of inclined surfaces.
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Which statement correctly describes the purpose of auxiliary views?
A · To provide additional views for complex shapes not clear in principal views
Auxiliary views are used to clarify complex shapes by projecting onto planes inclined to the principal planes, revealing details not visible or clear in standard views.
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Which of the following is NOT a type of auxiliary projection?
D · Quaternary auxiliary projection
Auxiliary projections are classified as primary, secondary, and tertiary. There is no recognized quaternary auxiliary projection.
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Primary auxiliary projection is used when the auxiliary plane is inclined to which plane?
A · Only one principal plane
Primary auxiliary projection involves projecting onto a plane inclined to only one of the principal planes (horizontal or vertical).
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Secondary auxiliary projections are constructed from which type of auxiliary view?
A · Primary auxiliary view
Secondary auxiliary projections are constructed from primary auxiliary views when the surface is inclined to two principal planes.
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Which of the following is true about tertiary auxiliary projections?
A · They are projections on planes inclined to both primary and secondary auxiliary planes
Tertiary auxiliary projections are used when the surface is inclined to both primary and secondary auxiliary planes, requiring projection onto a tertiary plane.
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Refer to the diagram below showing the construction of a primary auxiliary view. What is the first step in constructing this auxiliary view?
A · Project lines perpendicular to the auxiliary plane from the inclined surface
The first step in constructing an auxiliary view is projecting lines perpendicular from the inclined surface to the auxiliary plane to obtain the true shape.
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Which of the following is the correct sequence in constructing an auxiliary view?
A · Draw the reference view → Project perpendicular lines → Transfer points → Connect points
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Refer to the diagram below showing an inclined surface and its auxiliary projection. What is the true length of the inclined edge AB?
A · \( 70\,mm \)
The true length is obtained by projecting the inclined edge onto the auxiliary plane perpendicular to the edge, which measures 70 mm as shown in the diagram.
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Which of the following is an application of auxiliary projection in engineering drawing?
A · To find the true shape of an inclined surface
Auxiliary projection is primarily used to find the true shape and size of surfaces inclined to the principal planes, which is essential for accurate dimensioning and manufacturing.
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In which scenario is auxiliary projection most useful?
A · When surfaces are inclined and their true shape is not visible in principal views
Auxiliary projection is used when surfaces are inclined to the principal planes and their true shape cannot be accurately represented in standard orthographic views.
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Which of the following is a practical application of auxiliary views in engineering?
A · Determining the true size of a slanted hole
Auxiliary views help determine the true size and shape of features like slanted holes, which are not clearly visible in orthographic views.
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Which of the following best differentiates auxiliary projection from orthographic projection?
A · Auxiliary projection uses inclined planes; orthographic uses principal planes
Auxiliary projection involves projecting views onto planes inclined to the principal planes, whereas orthographic projection uses the principal horizontal and vertical planes.
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Which statement is true regarding orthographic and auxiliary projections?
A · Orthographic projections are on principal planes; auxiliary projections are on inclined planes
Orthographic projections are made on principal planes (horizontal, vertical), while auxiliary projections are made on planes inclined to these principal planes to reveal true shapes.
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Which of the following is NOT a characteristic of auxiliary projection compared to orthographic projection?
C · Always replaces front view
Auxiliary projections do not replace the front view; they supplement orthographic views to show true shapes of inclined surfaces.
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In first angle auxiliary projection, where is the auxiliary view placed relative to the reference view?
A · On the opposite side of the auxiliary plane
In first angle projection, the auxiliary view is placed on the opposite side of the auxiliary plane relative to the reference view.
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In third angle auxiliary projection, the auxiliary view is placed:
A · On the same side as the auxiliary plane
In third angle projection, the auxiliary view is placed on the same side as the auxiliary plane relative to the reference view.
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Which of the following correctly distinguishes first angle from third angle auxiliary projection?
A · First angle places auxiliary view opposite; third angle places it on the same side
The key difference is the placement of the auxiliary view relative to the auxiliary plane: opposite side in first angle, same side in third angle projection.
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Refer to the diagram below showing first angle auxiliary projection. Where should the auxiliary view be placed relative to the front view?
A · To the left of the front view
In first angle auxiliary projection, the auxiliary view is placed on the opposite side of the auxiliary plane, which is to the left of the front view in this diagram.
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Which of the following statements is true about determining true length of an inclined line using auxiliary projection?
A · Project the line onto an auxiliary plane perpendicular to it
True length of an inclined line is obtained by projecting it onto an auxiliary plane perpendicular to the line, revealing its actual length.
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Refer to the diagram below. The inclined edge AB is projected onto an auxiliary plane. What is the true length of AB?
B · \( 60\,mm \)
The true length is measured directly on the auxiliary projection where the edge AB is projected perpendicular to the auxiliary plane, showing 60 mm.
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Which of the following steps is essential for determining the true shape of an inclined surface using auxiliary projection?
A · Project the surface onto an auxiliary plane parallel to the surface
To find the true shape of an inclined surface, it must be projected onto an auxiliary plane parallel to that surface.
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Refer to the diagram below showing an inclined surface and its auxiliary projection. What does the auxiliary view represent?
A · The true shape of the inclined surface
The auxiliary view represents the true shape of the inclined surface by projecting it onto a plane parallel to the surface.
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Which of the following is true about the auxiliary view of an inclined surface?
A · It shows the true shape and size of the surface
The auxiliary view shows the true shape and size of the inclined surface by projecting it onto a plane parallel to the surface.
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Refer to the diagram below showing an inclined surface and its auxiliary projection. Which property of the surface is accurately represented in the auxiliary view?
A · True shape
The auxiliary view accurately represents the true shape of the inclined surface, which is not visible in the principal views.
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Which of the following is a challenge in constructing tertiary auxiliary projections?
A · Multiple inclined planes requiring sequential projections
Tertiary auxiliary projections involve multiple inclined planes, requiring sequential construction of primary and secondary auxiliary views before the tertiary view.
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Refer to the diagram below showing an inclined line AB and its auxiliary projection. What is the significance of the angle \( \theta \) between the inclined line and the horizontal plane?
A · It helps in determining the true length of AB
The angle \( \theta \) between the inclined line and the horizontal plane is essential to project the line correctly and determine its true length.
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Which of the following best defines auxiliary projection in engineering drawing?
B · A technique to show true size and shape of inclined surfaces
Auxiliary projection is used to show the true size and shape of surfaces that are inclined to the principal planes, which cannot be accurately represented in standard orthographic views.
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What is the primary purpose of auxiliary views in engineering drawings?
B · To accurately represent features that are not parallel to the principal planes
Auxiliary views are used to accurately represent features such as inclined or oblique surfaces that are not parallel to the principal projection planes.
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Auxiliary projection is mainly used to obtain the true shape of which type of surfaces?
C · Inclined or oblique surfaces
Auxiliary projection is specifically used to show the true size and shape of surfaces that are inclined or oblique to the principal planes.
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Which statement correctly describes the difference between primary and secondary auxiliary projections?
B · Primary auxiliary projections are taken from principal views; secondary are taken from primary auxiliary views
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Refer to the diagram below showing a primary auxiliary projection of an inclined surface. Which plane is used for projecting the auxiliary view?
A · A plane perpendicular to the inclined surface
The auxiliary view is projected onto a plane perpendicular to the inclined surface to show its true size and shape.
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Which of the following is a correct sequence for constructing an auxiliary view?
A · Project inclined surface → Draw auxiliary plane → Project view onto auxiliary plane
The correct method is to first identify the inclined surface, then draw an auxiliary plane perpendicular to it, and finally project the view onto this auxiliary plane.
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Refer to the diagram below showing an object with an inclined surface. Which step correctly follows after drawing the auxiliary plane perpendicular to the inclined surface?
A · Project points from the front view onto the auxiliary plane using perpendicular projectors
After drawing the auxiliary plane, points from the front view are projected perpendicularly onto it to create the auxiliary view showing the true size of the inclined surface.
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Which of the following is NOT a typical application of auxiliary projections in engineering drawing?
C · To replace sectional views in all cases
Auxiliary projections do not replace sectional views in all cases; sectional views are still necessary for showing internal features.
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In which scenario would an engineer most likely use a secondary auxiliary projection?
B · When the surface is inclined to the primary auxiliary plane
Secondary auxiliary projections are used when a surface is inclined to the primary auxiliary plane and its true size needs to be shown.
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Refer to the diagram below showing an inclined surface and its auxiliary projection. What is the main advantage of this auxiliary view?
A · It shows the surface in true shape and size
The auxiliary view shows the inclined surface in its true shape and size, which cannot be accurately represented in standard orthographic views.
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Which of the following correctly distinguishes auxiliary projection from orthographic projection?
C · Auxiliary projection uses planes perpendicular to inclined surfaces; orthographic uses principal planes
Auxiliary projection involves projecting views onto planes perpendicular to inclined surfaces, whereas orthographic projection uses principal planes (front, top, side).
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Which feature is unique to auxiliary projection compared to orthographic projection?
B · Projection on planes perpendicular to inclined surfaces
Auxiliary projection uniquely projects views onto planes perpendicular to inclined surfaces to show true size and shape, unlike orthographic projection which uses principal planes.
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Refer to the diagram below showing an orthographic front view and an auxiliary view of an inclined surface. What is the key difference between these two views?
B · The auxiliary view is projected on a plane perpendicular to the inclined surface
The auxiliary view is projected onto a plane perpendicular to the inclined surface, allowing it to show the true size and shape, unlike the orthographic view.
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When representing an inclined surface using auxiliary projection, which of the following is true about the surface's edges?
B · Edges appear in their true length in the auxiliary view
Auxiliary projection shows the edges of inclined surfaces in their true length, which is not possible in principal orthographic views.
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Refer to the diagram below of an inclined rectangular surface and its auxiliary view. What does the auxiliary view reveal that the front view does not?
A · True length and shape of the inclined surface
The auxiliary view reveals the true length and shape of the inclined surface, which appears foreshortened in the front view.
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Which of the following is a correct statement about the representation of inclined surfaces in auxiliary projection?
B · Inclined surfaces appear in true size and shape in auxiliary views
Auxiliary views are specifically constructed to show inclined surfaces in their true size and shape.
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In the first angle method of projection, where is the auxiliary view typically placed relative to the front view?
B · Opposite side to the inclined surface
In the first angle method, the auxiliary view is placed on the opposite side of the inclined surface relative to the front view.
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Which of the following correctly describes the difference between first angle and third angle methods in auxiliary projection?
C · In first angle, the auxiliary view is projected opposite the surface; in third angle, on the same side
In first angle method, auxiliary views are projected on the opposite side of the inclined surface, while in third angle method, they are projected on the same side.
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Refer to the diagram below illustrating first angle and third angle auxiliary projections. Which statement correctly identifies the placement of the auxiliary view in the third angle method?
B · Auxiliary view is placed on the same side as the inclined surface
In the third angle method, the auxiliary view is placed on the same side as the inclined surface to which it corresponds.
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Which of the following best describes the interpretation of an auxiliary view in engineering drawing?
B · It shows the true size and shape of inclined surfaces
Auxiliary views help in interpreting the true size and shape of surfaces inclined to the principal planes, aiding in accurate visualization.
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Refer to the diagram below showing an auxiliary view of a complex object. Which skill is primarily tested when interpreting this view?
A · Ability to visualize true shape of inclined surfaces
Interpreting auxiliary views requires spatial visualization skills to understand the true shape and size of inclined surfaces.
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Which of the following is a challenge when visualizing auxiliary views in engineering drawing?
A · Understanding the projection plane orientation
Visualizing auxiliary views requires understanding the orientation of the auxiliary projection plane relative to the object and principal planes.
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Which of the following steps is essential for constructing a secondary auxiliary view after obtaining a primary auxiliary view?
A · Projecting the primary auxiliary view onto a new auxiliary plane perpendicular to the inclined surface
Secondary auxiliary views are constructed by projecting the primary auxiliary view onto another auxiliary plane perpendicular to the surface of interest.
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Refer to the diagram below showing an inclined surface and its auxiliary projection. If the surface is inclined at 45° to the horizontal plane, what will be the angle between the auxiliary plane and the horizontal plane?
B · 90°
The auxiliary plane is drawn perpendicular (90°) to the inclined surface to show the true size and shape in the auxiliary view.
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Which of the following statements is true regarding the first angle and third angle methods in auxiliary projection?
C · First angle method places the auxiliary view opposite to the inclined surface; third angle places it on the same side
In first angle projection, auxiliary views are placed opposite the inclined surface, while in third angle, they are placed on the same side.
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Refer to the diagram below showing an object with an inclined surface and its auxiliary view constructed using the third angle method. Which of the following is true about the auxiliary view placement?
B · Auxiliary view is placed on the same side as the inclined surface
In the third angle method, the auxiliary view is placed on the same side as the inclined surface to which it corresponds.
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A plane surface ABCD is inclined at 60° to HP and 45° to VP. Edge AB lies in HP and edge BC is perpendicular to VP. If AB = 100 mm and BC = 70 mm, find the true length of diagonal AC using auxiliary projections.
B · 130 mm
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A line segment MN of length 95 mm is inclined at 50° to HP and 40° to VP. The auxiliary plane is drawn perpendicular to MN and inclined at 20° to HP. What is the angle between the auxiliary plane and VP?
B · 60°
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A line AB is 100 mm long and is inclined at 60° to HP and 45° to VP. The auxiliary plane is drawn perpendicular to HP and inclined at 30° to VP. What is the length of the projection of AB on this auxiliary plane?
B · 70.7 mm
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A line segment CD is 120 mm long and is inclined at 30° to HP and 75° to VP. The auxiliary plane is drawn perpendicular to VP and inclined at 45° to HP. What is the length of the projection of CD on this auxiliary plane?
A · 82.4 mm
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A line EF is 100 mm long, inclined at 60° to HP and 30° to VP. The auxiliary plane is drawn perpendicular to HP and inclined at 45° to VP. What is the length of the projection of EF on this auxiliary plane?
B · 86.6 mm
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A line GH is 130 mm long and is inclined at 40° to HP and 70° to VP. The auxiliary plane is drawn perpendicular to GH and inclined at 35° to HP. What is the angle between the auxiliary plane and VP?
B · 65°
