Question 1

Objects sketched in isometric projection provide a descriptive view of only one surface. &#10; .

Accepted Answer

Isometric projection allows for a three-dimensional representation, showing three sides of an object simultaneously, not just one surface.

Question 2

Receding lines in oblique projection are sometimes shortened to reduce visual distortion.

Accepted Answer

In oblique projection, receding lines are often shortened to make the object appear more natural and to reduce the visual distortion that can occur when these lines are projected at their true lengths.

Question 3

Isometric projection is one type of:&#10;A)Oblique projection&#10;B)Pictorial sketch&#10;C)Orthographic projection

Accepted Answer

Isometric projection is a method used in pictorial sketching where dimensions along each axis are equal, making it a type of pictorial sketch that provides a three-dimensional representation of an object.

Question 4

The main advantage of a pictorial view is that:&#10;A)It is easier to draw&#10;B)It is more difficult to draw&#10;C)It makes it easier for the user to visualize the part&#10;D)It shows information that could not be shown in any other way

Accepted Answer

Pictorial views are advantageous because they help users visualize the part more easily, offering a more intuitive understanding of its shape and features compared to other types of technical drawings.

Question 5

In this type of projection, the object is placed with one principal face parallel to the plane of projection:&#10;A)Isometric&#10;B)Oblique&#10;C)Orthographic

Accepted Answer

The answer of In this type of projection, the object...

Question 6

In isometric projection, the angle between a horizontal line and the line showing the lower right edge of the part is:&#10;A)20 degrees&#10;B)30 degrees&#10;C)45 degrees&#10;D)60 degrees

Accepted Answer

In isometric projection, the angles between the axes (and thus the angles between a horizontal line and the lines showing the edges of the part) are 120 degrees apart, making each angle with the horizontal 30 degrees.

Question 7

In isometric projection, holes drawn on the principal surface appear as circles.

Accepted Answer

In isometric projection, holes on the principal surfaces appear as ellipses because of the angle at which the surfaces are viewed.

Question 8

True isometric projections must be drawn using a special isometric scale that is two-thirds full size.

Accepted Answer

Isometric projections are drawn using a special isometric scale that is two-thirds full size because this scale preserves the true proportions of the object being drawn.

Question 9

In oblique projection, the angle most commonly used for lines that recede from the principal face is:&#10;A)20 degrees&#10;B)30 degrees&#10;C)45 degrees&#10;D)60 degrees

Accepted Answer

In oblique projection, 45 degrees is commonly used for receding lines to maintain a balance between distortion and clarity.

Question 10

In this type of projection, the three principal angles are of equal size.&#10;A)Isometric&#10;B)Oblique&#10;C)Orthographic

Accepted Answer

In isometric projection, the three principal axes (height, width, depth) are equally foreshortened and the angle between any two axes is 120 degrees, making the three principal angles appear of equal size. This contrasts with oblique and orthographic projections, where this equality does not apply.

Deck 4: Pictorial Sketching